微软SqlServerHelper
2024-07-02 01:57:52
1. 自己用
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;// 先引用 System.Configurationnamespace Common
{/// <summary>/// 数据库访问辅助类，add by ngye, on 2013-08-14./// </summary>public static class DBHelper{#region [ Tools ]//public static string ConnectionString = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;public static string ConnectionString = "Data Source=leaf-home\\sqlserver2005;Initial Catalog=Test;Persist Security Info=True;User ID=??;Password=??";public static SqlConnection GetConnection(){return new SqlConnection(ConnectionString);}public static SqlCommand AddTimeout(this SqlCommand cmd) {cmd.CommandTimeout = 3600;return cmd;}/// <summary>/// 执行cmd得到 DataTable. by ngye, on 2013-08-01/// </summary>/// <param name="cmd"></param>/// <returns></returns>public static DataTable ExecuteDataTable(this SqlCommand cmd){DataTable dt = new DataTable();using (SqlDataAdapter adapter = new SqlDataAdapter(cmd)){adapter.Fill(dt);}return dt;}/// <summary>/// 为SqlParameter设置参数. by ngye, on 2013-08-15./// </summary>/// <param name="sp"></param>/// <returns></returns>public static SqlParameter SetValue(this SqlParameter sp, object value){sp.Value = value;return sp;}/// <summary>/// 为SqlParameter设置类型. by ngye, on 2013-08-15./// </summary>/// <param name="sp"></param>/// <returns></returns>public static SqlParameter SetDbType(this SqlParameter sp, DbType dbType){sp.DbType = dbType;return sp;}#endregion#region [ ExecuteNonQuery_ForProc (无参/有参) ]/ <summary>/// 根据存储过程，返回受影响行数/// </summary>/// <param name="proc">proc</param>/// <returns>受影响行数</returns>public static int ExecuteNonQuery_ForProc(string proc){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(proc, conn).AddTimeout();cmd.CommandType = CommandType.StoredProcedure;return cmd.ExecuteNonQuery();}}/ <summary>/// 根据存储过程和参数，返回受影响行数/// </summary>/// <param name="proc">proc</param>/// <param name="spArr">可变参数</param>/// <returns>受影响行数</returns>public static int ExecuteNonQuery_ForProc(string proc, params SqlParameter[] spArr){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(proc, conn).AddTimeout();cmd.CommandType = CommandType.StoredProcedure;cmd.Parameters.AddRange(spArr);return cmd.ExecuteNonQuery();}}#endregion#region [ ExecuteNonQuery (无参/有参) ]/ <summary>/// 根据sql语句，返回受影响行数/// </summary>/// <param name="sql">sql语句</param>/// <returns>受影响行数</returns>public static int ExecuteNonQuery(string sql){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();return cmd.ExecuteNonQuery();}}/ <summary>/// 根据sql语句和参数，返回受影响行数/// </summary>/// <param name="sql">sql语句</param>/// <param name="spArr">可变参数</param>/// <returns>受影响行数</returns>public static int ExecuteNonQuery(string sql, params SqlParameter[] spArr){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();cmd.Parameters.AddRange(spArr);return cmd.ExecuteNonQuery();}}#endregion#region [ ExecuteScalar (无参/有参) ]/// <summary>/// 根据sql语句，返回Scalar结果/// </summary>/// <param name="sql">sql语句</param>/// <returns>object</returns>public static object ExecuteScalar(string sql){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();object obj = cmd.ExecuteScalar();return obj;}}/// <summary>/// 根据sql语句和参数，返回Scalar结果/// </summary>/// <param name="sql">sql语句</param>/// <param name="spArr">可变参数</param>/// <returns>object</returns>public static object ExecuteScalar(string sql, params SqlParameter[] spArr){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();cmd.Parameters.AddRange(spArr);object obj = cmd.ExecuteScalar();return obj;}}#endregion#region [ QueryByProc (无参/有参) ]/// <summary>/// 根据存储过程，返回DataTable/// </summary>/// <param name="proc">proc</param>/// <returns>DataTable</returns>public static DataTable GetDataTableByProc(string proc){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(proc, conn).AddTimeout();cmd.CommandType = CommandType.StoredProcedure;DataTable dt = cmd.ExecuteDataTable();return dt;}}/// <summary>/// 根据存储过程及参数，返回DataTable/// </summary>/// <returns>DataTable</returns>public static DataTable GetDataTableByProc(string proc, params SqlParameter[] spArr){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(proc, conn).AddTimeout();cmd.CommandType = CommandType.StoredProcedure;cmd.Parameters.AddRange(spArr);DataTable dt = cmd.ExecuteDataTable();return dt;}}#endregion#region [ Query (无参) ]/// <summary>/// 根据sql语句和参数，返回DataTable/// </summary>/// <param name="sql">sql语句</param>/// <returns>DataTable</returns>public static DataTable GetDataTableBySql(string sql){using (SqlConnection conn = GetConnection()){conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();DataTable dt = cmd.ExecuteDataTable();return dt;}}/// <summary>/// 根据sql语句，返回DataRow/// </summary>/// <param name="sql">sql语句</param>/// <returns>DataRow</returns>public static DataRow GetDataRowBySql(string sql){DataTable dt = GetDataTableBySql(sql);if (dt == null || dt.Rows.Count == 0)return null;return dt.Rows[0];}#endregion #region [ Query (有参) ]/// <summary>/// 根据sql语句和参数，返回DataTable/// </summary>/// <param name="sql">sql语句</param>/// <param name="spArr">可变参数</param>/// <returns>DataTable</returns>public static DataTable GetDataTableBySql(string sql, params SqlParameter[] spArr){using (SqlConnection conn = GetConnection()) {conn.Open();SqlCommand cmd = new SqlCommand(sql, conn).AddTimeout();cmd.Parameters.AddRange(spArr);DataTable dt = cmd.ExecuteDataTable();return dt;}}/// <summary>/// 根据sql语句和参数，返回DataRow/// </summary>/// <param name="sql">sql语句</param>/// <param name="spArr">可变参数</param>/// <returns>DataRow</returns>public static DataRow GetDataRowBySql(string sql, params SqlParameter[] spArr){DataTable dt = GetDataTableBySql(sql, spArr);if (dt == null || dt.Rows.Count==0)return null;return dt.Rows[0];}#endregion}//end of class
}//end of namespace
2. 微软
//===============================================================================
// This file is based on the Microsoft Data Access Application Block for .NET
// For more information please go to
// http://msdn.microsoft.com/library/en-us/dnbda/html/daab-rm.asp
//===============================================================================using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Collections;namespace FingerLink.Core.Communal
{/// <summary>/// The SqlHelper class is intended to encapsulate high performance, /// scalable best practices for common uses of SqlClient./// </summary>public class SqlServerHelper{//Database connection stringspublic static string connString = ConfigurationManager.ConnectionStrings["sqlserver"].ConnectionString;// Hashtable to store cached parametersprivate static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());/// <summary>/// Execute a SqlCommand (that returns no resultset) against the database specified in the connection string /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">a valid connection string for a SqlConnection</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>an int representing the number of rows affected by the command</returns>public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();using (SqlConnection conn = new SqlConnection(connectionString)){PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);int val = cmd.ExecuteNonQuery();cmd.Parameters.Clear();return val;}}/// <summary>/// Execute a SqlCommand (that returns no resultset) against an existing database connection /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="conn">an existing database connection</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>an int representing the number of rows affected by the command</returns>public static int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);int val = cmd.ExecuteNonQuery();cmd.Parameters.Clear();return val;}/// <summary>/// Execute a SqlCommand (that returns no resultset) using an existing SQL Transaction /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="trans">an existing sql transaction</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>an int representing the number of rows affected by the command</returns>public static int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);int val = cmd.ExecuteNonQuery();cmd.Parameters.Clear();return val;}/// <summary>/// Execute a SqlCommand that returns a resultset against the database specified in the connection string /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// SqlDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">a valid connection string for a SqlConnection</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>A SqlDataReader containing the results</returns>public static SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();SqlConnection conn = new SqlConnection(connectionString);// we use a try/catch here because if the method throws an exception we want to // close the connection throw code, because no datareader will exist, hence the // commandBehaviour.CloseConnection will not worktry{PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);cmd.Parameters.Clear();return rdr;}catch{conn.Close();throw;}}/// <summary>/// Execute a SqlCommand that returns the first column of the first record against the database specified in the connection string /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">a valid connection string for a SqlConnection</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();using (SqlConnection connection = new SqlConnection(connectionString)){PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);object val = cmd.ExecuteScalar();cmd.Parameters.Clear();return val;}}/// <summary>/// Execute a SqlCommand that returns the first column of the first record against an existing database connection /// using the provided parameters./// </summary>/// <remarks>/// e.g.: /// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="conn">an existing database connection</param>/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>/// <param name="commandText">the stored procedure name or T-SQL command</param>/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>public static object ExecuteScalar(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters){SqlCommand cmd = new SqlCommand();PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);object val = cmd.ExecuteScalar();cmd.Parameters.Clear();return val;}/// <summary>/// add parameter array to the cache/// </summary>/// <param name="cacheKey">Key to the parameter cache</param>/// <param name="cmdParms">an array of SqlParamters to be cached</param>public static void CacheParameters(string cacheKey, params SqlParameter[] commandParameters){parmCache[cacheKey] = commandParameters;}/// <summary>/// Retrieve cached parameters/// </summary>/// <param name="cacheKey">key used to lookup parameters</param>/// <returns>Cached SqlParamters array</returns>public static SqlParameter[] GetCachedParameters(string cacheKey){SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];if (cachedParms == null)return null;SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];for (int i = 0, j = cachedParms.Length; i < j; i++)clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();return clonedParms;}/// <summary>/// Prepare a command for execution/// </summary>/// <param name="cmd">SqlCommand object</param>/// <param name="conn">SqlConnection object</param>/// <param name="trans">SqlTransaction object</param>/// <param name="cmdType">Cmd type e.g. stored procedure or text</param>/// <param name="cmdText">Command text, e.g. Select * from Products</param>/// <param name="cmdParms">SqlParameters to use in the command</param>private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms){if (conn.State != ConnectionState.Open)conn.Open();cmd.Connection = conn;cmd.CommandText = cmdText;if (trans != null)cmd.Transaction = trans;cmd.CommandType = cmdType;if (cmdParms != null){foreach (SqlParameter parm in cmdParms)cmd.Parameters.Add(parm);}}}
}3. 下载人家的
using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;
using System.Collections;
namespace Book.DAL
{/// <summary>/// SqlServer数据访问帮助类/// </summary>public sealed class SqlHelper{#region 私有构造函数和方法private SqlHelper() { }/// <summary>/// 将SqlParameter参数数组(参数值)分配给SqlCommand命令./// 这个方法将给任何一个参数分配DBNull.Value;/// 该操作将阻止默认值的使用./// </summary>/// <param name="command">命令名</param>/// <param name="commandParameters">SqlParameters数组</param>private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters){if (command == null) throw new ArgumentNullException("command");if (commandParameters != null){foreach (SqlParameter p in commandParameters){if (p != null){// 检查未分配值的输出参数,将其分配以DBNull.Value.if ((p.Direction == ParameterDirection.InputOutput || p.Direction == ParameterDirection.Input) &&(p.Value == null)){p.Value = DBNull.Value;}command.Parameters.Add(p);}}}}/// <summary>/// 将DataRow类型的列值分配到SqlParameter参数数组./// </summary>/// <param name="commandParameters">要分配值的SqlParameter参数数组</param>/// <param name="dataRow">将要分配给存储过程参数的DataRow</param>private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow){if ((commandParameters == null) || (dataRow == null)){return;}int i = 0;// 设置参数值foreach (SqlParameter commandParameter in commandParameters){// 创建参数名称,如果不存在,只抛出一个异常.if (commandParameter.ParameterName == null ||commandParameter.ParameterName.Length <= 1)throw new Exception(string.Format("请提供参数{0}一个有效的名称{1}.", i, commandParameter.ParameterName));// 从dataRow的表中获取为参数数组中数组名称的列的索引.// 如果存在和参数名称相同的列,则将列值赋给当前名称的参数.if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];i++;}}/// <summary>/// 将一个对象数组分配给SqlParameter参数数组./// </summary>/// <param name="commandParameters">要分配值的SqlParameter参数数组</param>/// <param name="parameterValues">将要分配给存储过程参数的对象数组</param>private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues){if ((commandParameters == null) || (parameterValues == null)){return;}// 确保对象数组个数与参数个数匹配,如果不匹配,抛出一个异常.if (commandParameters.Length != parameterValues.Length){throw new ArgumentException("参数值个数与参数不匹配.");}// 给参数赋值for (int i = 0, j = commandParameters.Length; i < j; i++){// If the current array value derives from IDbDataParameter, then assign its Value propertyif (parameterValues[i] is IDbDataParameter){IDbDataParameter paramInstance = (IDbDataParameter)parameterValues[i];if (paramInstance.Value == null){commandParameters[i].Value = DBNull.Value;}else{commandParameters[i].Value = paramInstance.Value;}}else if (parameterValues[i] == null){commandParameters[i].Value = DBNull.Value;}else{commandParameters[i].Value = parameterValues[i];}}}/// <summary>/// 预处理用户提供的命令,数据库连接/事务/命令类型/参数/// </summary>/// <param name="command">要处理的SqlCommand</param>/// <param name="connection">数据库连接</param>/// <param name="transaction">一个有效的事务或者是null值</param>/// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>/// <param name="commandText">存储过程名或都T-SQL命令文本</param>/// <param name="commandParameters">和命令相关联的SqlParameter参数数组,如果没有参数为'null'</param>/// <param name="mustCloseConnection"><c>true</c> 如果连接是打开的,则为true,其它情况下为false.</param>private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, out bool mustCloseConnection){if (command == null) throw new ArgumentNullException("command");if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");// If the provided connection is not open, we will open itif (connection.State != ConnectionState.Open){mustCloseConnection = true;connection.Open();}else{mustCloseConnection = false;}// 给命令分配一个数据库连接.command.Connection = connection;// 设置命令文本(存储过程名或SQL语句)command.CommandText = commandText;// 分配事务if (transaction != null){if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");command.Transaction = transaction;}// 设置命令类型.command.CommandType = commandType;// 分配命令参数if (commandParameters != null){AttachParameters(command, commandParameters);}return;}#endregion 私有构造函数和方法结束#region ExecuteNonQuery命令/// <summary>/// 执行指定连接字符串,类型的SqlCommand./// </summary>/// <remarks>/// 示例: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>/// <param name="commandText">存储过程名称或SQL语句</param>/// <returns>返回命令影响的行数</returns>public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText){return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定连接字符串,类型的SqlCommand.如果没有提供参数,不返回结果./// </summary>/// <remarks>/// 示例: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本, 其它.)</param>/// <param name="commandText">存储过程名称或SQL语句</param>/// <param name="commandParameters">SqlParameter参数数组</param>/// <returns>返回命令影响的行数</returns>public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();return ExecuteNonQuery(connection, commandType, commandText, commandParameters);}}/// <summary>/// 执行指定连接字符串的存储过程,将对象数组的值赋给存储过程参数,/// 此方法需要在参数缓存方法中探索参数并生成参数./// </summary>/// <remarks>/// 这个方法没有提供访问输出参数和返回值./// 示例: /// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串/param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配到存储过程输入参数的对象数组</param>/// <returns>返回受影响的行数</returns>public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果存在参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从探索存储过程参数(加载到缓存)并分配给存储过程参数数组.SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数情况下return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库连接对象的命令 /// </summary>/// <remarks>/// 示例: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText){return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接对象的命令/// </summary>/// <remarks>/// 示例: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>/// <param name="commandText">T存储过程名称或T-SQL语句</param>/// <param name="commandParameters">SqlParamter参数数组</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");// 创建SqlCommand命令,并进行预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// Finally, execute the commandint retval = cmd.ExecuteNonQuery();// 清除参数,以便再次使用.cmd.Parameters.Clear();if (mustCloseConnection)connection.Close();return retval;}/// <summary>/// 执行指定数据库连接对象的命令,将对象数组的值赋给存储过程参数./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值/// 示例: /// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 给存储过程分配参数值AssignParameterValues(commandParameters, parameterValues);return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行带事务的SqlCommand./// </summary>/// <remarks>/// 示例.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="transaction">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回影响的行数/returns>public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行带事务的SqlCommand(指定参数)./// </summary>/// <remarks>/// 示例: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型(存储过程,命令文本或其它.)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">SqlParamter参数数组</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");// 预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 执行int retval = cmd.ExecuteNonQuery();// 清除参数集,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 执行带事务的SqlCommand(指定参数值)./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值/// 示例: /// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);/// </remarks>/// <param name="transaction">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回受影响的行数</returns>public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteNonQuery方法结束#region ExecuteDataset方法/// <summary>/// 执行指定数据库连接字符串的命令,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText){return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接字符串的命令,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">SqlParamters参数数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");// 创建并打开数据库连接对象,操作完成释放对象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 调用指定数据库连接字符串重载方法.return ExecuteDataset(connection, commandType, commandText, commandParameters);}}/// <summary>/// 执行指定数据库连接字符串的命令,直接提供参数值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值./// 示例: /// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中检索存储过程参数SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 给存储过程参数分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库连接对象的命令,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText){return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接对象的命令,指定存储过程参数,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <param name="commandParameters">SqlParamter参数数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");// 预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 创建SqlDataAdapter和DataSet.using (SqlDataAdapter da = new SqlDataAdapter(cmd)){DataSet ds = new DataSet();// 填充DataSet.da.Fill(ds);cmd.Parameters.Clear();if (mustCloseConnection)connection.Close();return ds;}}/// <summary>/// 执行指定数据库连接对象的命令,指定参数值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供访问存储过程输入参数和返回值./// 示例.: /// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");if ((parameterValues != null) && (parameterValues.Length > 0)){// 比缓存中加载存储过程参数SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 给存储过程参数分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定事务的命令,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定事务的命令,指定参数,返回DataSet./// </summary>/// <remarks>/// 示例: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <param name="commandParameters">SqlParamter参数数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");// 预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 创建 DataAdapter & DataSetusing (SqlDataAdapter da = new SqlDataAdapter(cmd)){DataSet ds = new DataSet();da.Fill(ds);cmd.Parameters.Clear();return ds;}}/// <summary>/// 执行指定事务的命令,指定参数值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供访问存储过程输入参数和返回值./// 示例.: /// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">事务</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回一个包含结果集的DataSet</returns>public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 给存储过程参数分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteDataset数据集命令结束#region ExecuteReader 数据阅读器/// <summary>/// 枚举,标识数据库连接是由SqlHelper提供还是由调用者提供/// </summary>private enum SqlConnectionOwnership{/// <summary>由SqlHelper提供连接</summary>Internal,/// <summary>由调用者提供连接</summary>External}/// <summary>/// 执行指定数据库连接对象的数据阅读器./// </summary>/// <remarks>/// 如果是SqlHelper打开连接,当连接关闭DataReader也将关闭./// 如果是调用都打开连接,DataReader由调用都管理./// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="transaction">一个有效的事务,或者为 'null'</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <param name="commandParameters">SqlParameters参数数组,如果没有参数则为'null'</param>/// <param name="connectionOwnership">标识数据库连接对象是由调用者提供还是由SqlHelper提供</param>/// <returns>返回包含结果集的SqlDataReader</returns>private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership){if (connection == null) throw new ArgumentNullException("connection");bool mustCloseConnection = false;// 创建命令SqlCommand cmd = new SqlCommand();try{PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 创建数据阅读器SqlDataReader dataReader;if (connectionOwnership == SqlConnectionOwnership.External){dataReader = cmd.ExecuteReader();}else{dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);}// 清除参数,以便再次使用..// HACK: There is a problem here, the output parameter values are fletched // when the reader is closed, so if the parameters are detached from the command// then the SqlReader can磘 set its values. // When this happen, the parameters can磘 be used again in other command.bool canClear = true;foreach (SqlParameter commandParameter in cmd.Parameters){if (commandParameter.Direction != ParameterDirection.Input)canClear = false;}if (canClear){cmd.Parameters.Clear();}return dataReader;}catch{if (mustCloseConnection)connection.Close();throw;}}/// <summary>/// 执行指定数据库连接字符串的数据阅读器./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText){return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接字符串的数据阅读器,指定参数./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <param name="commandParameters">SqlParamter参数数组(new SqlParameter("@prodid", 24))</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");SqlConnection connection = null;try{connection = new SqlConnection(connectionString);connection.Open();return ExecuteReader(connection, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal);}catch{// If we fail to return the SqlDatReader, we need to close the connection ourselvesif (connection != null) connection.Close();throw;}}/// <summary>/// 执行指定数据库连接字符串的数据阅读器,指定参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// 示例: /// SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");if ((parameterValues != null) && (parameterValues.Length > 0)){SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);AssignParameterValues(commandParameters, parameterValues);return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库连接对象的数据阅读器./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名或T-SQL语句</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText){return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// [调用者方式]执行指定数据库连接对象的数据阅读器,指定参数./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandParameters">SqlParamter参数数组</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External);}/// <summary>/// [调用者方式]执行指定数据库连接对象的数据阅读器,指定参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// 示例: /// SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">T存储过程名</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");if ((parameterValues != null) && (parameterValues.Length > 0)){SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);AssignParameterValues(commandParameters, parameterValues);return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// [调用者方式]执行指定数据库事务的数据阅读器,指定参数值./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// [调用者方式]执行指定数据库事务的数据阅读器,指定参数./// </summary>/// <remarks>/// 示例: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External);}/// <summary>/// [调用者方式]执行指定数据库事务的数据阅读器,指定参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);AssignParameterValues(commandParameters, parameterValues);return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteReader(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteReader数据阅读器#region ExecuteScalar 返回结果集中的第一行第一列/// <summary>/// 执行指定数据库连接字符串的命令,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText){// 执行参数为空的方法return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接字符串的命令,指定参数,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");// 创建并打开数据库连接对象,操作完成释放对象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 调用指定数据库连接字符串重载方法.return ExecuteScalar(connection, commandType, commandText, commandParameters);}}/// <summary>/// 执行指定数据库连接字符串的命令,指定参数值,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库连接对象的命令,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText){// 执行参数为空的方法return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接对象的命令,指定参数,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");// 创建SqlCommand命令,并进行预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 执行SqlCommand命令,并返回结果.object retval = cmd.ExecuteScalar();// 清除参数,以便再次使用.cmd.Parameters.Clear();if (mustCloseConnection)connection.Close();return retval;}/// <summary>/// 执行指定数据库连接对象的命令,指定参数值,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteScalar(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库事务的命令,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText){// 执行参数为空的方法return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库事务的命令,指定参数,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 示例: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");// 创建SqlCommand命令,并进行预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 执行SqlCommand命令,并返回结果.object retval = cmd.ExecuteScalar();// 清除参数,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 执行指定数据库事务的命令,指定参数值,返回结果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// PPull the parameters for this stored procedure from the parameter cache ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteScalar#region ExecuteXmlReader XML阅读器/// <summary>/// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回./// </summary>/// <remarks>/// 示例: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText){// 执行参数为空的方法return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数./// </summary>/// <remarks>/// 示例: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");bool mustCloseConnection = false;// 创建SqlCommand命令,并进行预处理SqlCommand cmd = new SqlCommand();try{PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 执行命令XmlReader retval = cmd.ExecuteXmlReader();// 清除参数,以便再次使用.cmd.Parameters.Clear();return retval;}catch{if (mustCloseConnection)connection.Close();throw;}}/// <summary>/// 执行指定数据库连接对象的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称 using "FOR XML AUTO"</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回./// </summary>/// <remarks>/// 示例: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText){// 执行参数为空的方法return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数./// </summary>/// <remarks>/// 示例: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句 using "FOR XML AUTO"</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");// 创建SqlCommand命令,并进行预处理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 执行命令XmlReader retval = cmd.ExecuteXmlReader();// 清除参数,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 执行指定数据库事务的SqlCommand命令,并产生一个XmlReader对象做为结果集返回,指定参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="spName">存储过程名称</param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>/// <returns>返回一个包含结果集的DataSet.</returns>public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 没有参数值return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteXmlReader 阅读器结束#region FillDataset 填充数据集/// <summary>/// 执行指定数据库连接字符串的命令,映射数据表并填充数据集./// </summary>/// <remarks>/// 示例: /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)</param>public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (dataSet == null) throw new ArgumentNullException("dataSet");// 创建并打开数据库连接对象,操作完成释放对象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 调用指定数据库连接字符串重载方法.FillDataset(connection, commandType, commandText, dataSet, tableNames);}}/// <summary>/// 执行指定数据库连接字符串的命令,映射数据表并填充数据集.指定命令参数./// </summary>/// <remarks>/// 示例: /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>public static void FillDataset(string connectionString, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames,params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (dataSet == null) throw new ArgumentNullException("dataSet");// 创建并打开数据库连接对象,操作完成释放对象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 调用指定数据库连接字符串重载方法.FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);}}/// <summary>/// 执行指定数据库连接字符串的命令,映射数据表并填充数据集,指定存储过程参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);/// </remarks>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param> /// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>public static void FillDataset(string connectionString, string spName,DataSet dataSet, string[] tableNames,params object[] parameterValues){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (dataSet == null) throw new ArgumentNullException("dataSet");// 创建并打开数据库连接对象,操作完成释放对象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 调用指定数据库连接字符串重载方法.FillDataset(connection, spName, dataSet, tableNames, parameterValues);}}/// <summary>/// 执行指定数据库连接对象的命令,映射数据表并填充数据集./// </summary>/// <remarks>/// 示例: /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param> public static void FillDataset(SqlConnection connection, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames){FillDataset(connection, commandType, commandText, dataSet, tableNames, null);}/// <summary>/// 执行指定数据库连接对象的命令,映射数据表并填充数据集,指定参数./// </summary>/// <remarks>/// 示例: /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>public static void FillDataset(SqlConnection connection, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames,params SqlParameter[] commandParameters){FillDataset(connection, null, commandType, commandText, dataSet, tableNames, commandParameters);}/// <summary>/// 执行指定数据库连接对象的命令,映射数据表并填充数据集,指定存储过程参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>public static void FillDataset(SqlConnection connection, string spName,DataSet dataSet, string[] tableNames,params object[] parameterValues){if (connection == null) throw new ArgumentNullException("connection");if (dataSet == null) throw new ArgumentNullException("dataSet");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);}else{// 没有参数值FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);}}/// <summary>/// 执行指定数据库事务的命令,映射数据表并填充数据集./// </summary>/// <remarks>/// 示例: /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>public static void FillDataset(SqlTransaction transaction, CommandType commandType,string commandText,DataSet dataSet, string[] tableNames){FillDataset(transaction, commandType, commandText, dataSet, tableNames, null);}/// <summary>/// 执行指定数据库事务的命令,映射数据表并填充数据集,指定参数./// </summary>/// <remarks>/// 示例: /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>public static void FillDataset(SqlTransaction transaction, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames,params SqlParameter[] commandParameters){FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);}/// <summary>/// 执行指定数据库事务的命令,映射数据表并填充数据集,指定存储过程参数值./// </summary>/// <remarks>/// 此方法不提供访问存储过程输出参数和返回值参数./// /// 示例: /// FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);/// </remarks>/// <param name="transaction">一个有效的连接事务</param>/// <param name="spName">存储过程名称</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>/// <param name="parameterValues">分配给存储过程输入参数的对象数组</param>public static void FillDataset(SqlTransaction transaction, string spName,DataSet dataSet, string[] tableNames,params object[] parameterValues){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (dataSet == null) throw new ArgumentNullException("dataSet");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果有参数值if ((parameterValues != null) && (parameterValues.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 给存储过程参数赋值AssignParameterValues(commandParameters, parameterValues);// 调用重载方法FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);}else{// 没有参数值FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);}}/// <summary>/// [私有方法][内部调用]执行指定数据库连接对象/事务的命令,映射数据表并填充数据集,DataSet/TableNames/SqlParameters./// </summary>/// <remarks>/// 示例: /// FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="transaction">一个有效的连接事务</param>/// <param name="commandType">命令类型 (存储过程,命令文本或其它)</param>/// <param name="commandText">存储过程名称或T-SQL语句</param>/// <param name="dataSet">要填充结果集的DataSet实例</param>/// <param name="tableNames">表映射的数据表数组/// 用户定义的表名 (可有是实际的表名.)/// </param>/// <param name="commandParameters">分配给命令的SqlParamter参数数组</param>private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames,params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");if (dataSet == null) throw new ArgumentNullException("dataSet");// 创建SqlCommand命令,并进行预处理SqlCommand command = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 执行命令using (SqlDataAdapter dataAdapter = new SqlDataAdapter(command)){// 追加表映射if (tableNames != null && tableNames.Length > 0){string tableName = "Table";for (int index = 0; index < tableNames.Length; index++){if (tableNames[index] == null || tableNames[index].Length == 0) throw new ArgumentException("The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames");dataAdapter.TableMappings.Add(tableName, tableNames[index]);tableName += (index + 1).ToString();}}// 填充数据集使用默认表名称dataAdapter.Fill(dataSet);// 清除参数,以便再次使用.command.Parameters.Clear();}if (mustCloseConnection)connection.Close();}#endregion#region UpdateDataset 更新数据集/// <summary>/// 执行数据集更新到数据库,指定inserted, updated, or deleted命令./// </summary>/// <remarks>/// 示例: /// UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");/// </remarks>/// <param name="insertCommand">[追加记录]一个有效的T-SQL语句或存储过程</param>/// <param name="deleteCommand">[删除记录]一个有效的T-SQL语句或存储过程</param>/// <param name="updateCommand">[更新记录]一个有效的T-SQL语句或存储过程</param>/// <param name="dataSet">要更新到数据库的DataSet</param>/// <param name="tableName">要更新到数据库的DataTable</param>public static void UpdateDataset(SqlCommand insertCommand, SqlCommand deleteCommand, SqlCommand updateCommand, DataSet dataSet, string tableName){if (insertCommand == null) throw new ArgumentNullException("insertCommand");if (deleteCommand == null) throw new ArgumentNullException("deleteCommand");if (updateCommand == null) throw new ArgumentNullException("updateCommand");if (tableName == null || tableName.Length == 0) throw new ArgumentNullException("tableName");// 创建SqlDataAdapter,当操作完成后释放.using (SqlDataAdapter dataAdapter = new SqlDataAdapter()){// 设置数据适配器命令dataAdapter.UpdateCommand = updateCommand;dataAdapter.InsertCommand = insertCommand;dataAdapter.DeleteCommand = deleteCommand;// 更新数据集改变到数据库dataAdapter.Update(dataSet, tableName);// 提交所有改变到数据集.dataSet.AcceptChanges();}}#endregion#region CreateCommand 创建一条SqlCommand命令/// <summary>/// 创建SqlCommand命令,指定数据库连接对象,存储过程名和参数./// </summary>/// <remarks>/// 示例: /// SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");/// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="sourceColumns">源表的列名称数组</param>/// <returns>返回SqlCommand命令</returns>public static SqlCommand CreateCommand(SqlConnection connection, string spName, params string[] sourceColumns){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 创建命令SqlCommand cmd = new SqlCommand(spName, connection);cmd.CommandType = CommandType.StoredProcedure;// 如果有参数值if ((sourceColumns != null) && (sourceColumns.Length > 0)){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 将源表的列到映射到DataSet命令中.for (int index = 0; index < sourceColumns.Length; index++)commandParameters[index].SourceColumn = sourceColumns[index];// Attach the discovered parameters to the SqlCommand objectAttachParameters(cmd, commandParameters);}return cmd;}#endregion#region ExecuteNonQueryTypedParams 类型化参数(DataRow)/// <summary>/// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回受影响的行数./// </summary>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回受影响的行数./// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQueryTypedParams(SqlConnection connection, String spName, DataRow dataRow){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回受影响的行数./// </summary>/// <param name="transaction">一个有效的连接事务 object</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回影响的行数</returns>public static int ExecuteNonQueryTypedParams(SqlTransaction transaction, String spName, DataRow dataRow){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// Sf the row has values, the store procedure parameters must be initializedif (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteDatasetTypedParams 类型化参数(DataRow)/// <summary>/// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataSet./// </summary>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回一个包含结果集的DataSet.</returns>public static DataSet ExecuteDatasetTypedParams(string connectionString, String spName, DataRow dataRow){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");//如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataSet./// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回一个包含结果集的DataSet.</returns>/// public static DataSet ExecuteDatasetTypedParams(SqlConnection connection, String spName, DataRow dataRow){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回DataSet./// </summary>/// <param name="transaction">一个有效的连接事务 object</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回一个包含结果集的DataSet.</returns>public static DataSet ExecuteDatasetTypedParams(SqlTransaction transaction, String spName, DataRow dataRow){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteReaderTypedParams 类型化参数(DataRow)/// <summary>/// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回DataReader./// </summary>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回DataReader./// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库事物的存储过程,使用DataRow做为参数值,返回DataReader./// </summary>/// <param name="transaction">一个有效的连接事务 object</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回包含结果集的SqlDataReader</returns>public static SqlDataReader ExecuteReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteScalarTypedParams 类型化参数(DataRow)/// <summary>/// 执行指定连接数据库连接字符串的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列./// </summary>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列./// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalarTypedParams(SqlConnection connection, String spName, DataRow dataRow){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回结果集中的第一行第一列./// </summary>/// <param name="transaction">一个有效的连接事务 object</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回结果集中的第一行第一列</returns>public static object ExecuteScalarTypedParams(SqlTransaction transaction, String spName, DataRow dataRow){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteXmlReaderTypedParams 类型化参数(DataRow)/// <summary>/// 执行指定连接数据库连接对象的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集./// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReaderTypedParams(SqlConnection connection, String spName, DataRow dataRow){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 执行指定连接数据库事务的存储过程,使用DataRow做为参数值,返回XmlReader类型的结果集./// </summary>/// <param name="transaction">一个有效的连接事务 object</param>/// <param name="spName">存储过程名称</param>/// <param name="dataRow">使用DataRow作为参数值</param>/// <returns>返回XmlReader结果集对象.</returns>public static XmlReader ExecuteXmlReaderTypedParams(SqlTransaction transaction, String spName, DataRow dataRow){if (transaction == null) throw new ArgumentNullException("transaction");if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");// 如果row有值,存储过程必须初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 从缓存中加载存储过程参数,如果缓存中不存在则从数据库中检索参数信息并加载到缓存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配参数值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);}}#endregion}/// <summary>/// SqlHelperParameterCache提供缓存存储过程参数,并能够在运行时从存储过程中探索参数./// </summary>public sealed class SqlHelperParameterCache{#region 私有方法,字段,构造函数// 私有构造函数,妨止类被实例化.private SqlHelperParameterCache() { }// 这个方法要注意private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());/// <summary>/// 探索运行时的存储过程,返回SqlParameter参数数组./// 初始化参数值为 DBNull.Value./// </summary>/// <param name="connection">一个有效的数据库连接</param>/// <param name="spName">存储过程名称</param>/// <param name="includeReturnValueParameter">是否包含返回值参数</param>/// <returns>返回SqlParameter参数数组</returns>private static SqlParameter[] DiscoverSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");SqlCommand cmd = new SqlCommand(spName, connection);cmd.CommandType = CommandType.StoredProcedure;connection.Open();// 检索cmd指定的存储过程的参数信息,并填充到cmd的Parameters参数集中.SqlCommandBuilder.DeriveParameters(cmd);connection.Close();// 如果不包含返回值参数,将参数集中的每一个参数删除.if (!includeReturnValueParameter){cmd.Parameters.RemoveAt(0);}// 创建参数数组SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count];// 将cmd的Parameters参数集复制到discoveredParameters数组.cmd.Parameters.CopyTo(discoveredParameters, 0);// 初始化参数值为 DBNull.Value.foreach (SqlParameter discoveredParameter in discoveredParameters){discoveredParameter.Value = DBNull.Value;}return discoveredParameters;}/// <summary>/// SqlParameter参数数组的深层拷贝./// </summary>/// <param name="originalParameters">原始参数数组</param>/// <returns>返回一个同样的参数数组</returns>private static SqlParameter[] CloneParameters(SqlParameter[] originalParameters){SqlParameter[] clonedParameters = new SqlParameter[originalParameters.Length];for (int i = 0, j = originalParameters.Length; i < j; i++){clonedParameters[i] = (SqlParameter)((ICloneable)originalParameters[i]).Clone();}return clonedParameters;}#endregion 私有方法,字段,构造函数结束#region 缓存方法/// <summary>/// 追加参数数组到缓存./// </summary>/// <param name="connectionString">一个有效的数据库连接字符串</param>/// <param name="commandText">存储过程名或SQL语句</param>/// <param name="commandParameters">要缓存的参数数组</param>public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");string hashKey = connectionString + ":" + commandText;paramCache[hashKey] = commandParameters;}/// <summary>/// 从缓存中获取参数数组./// </summary>/// <param name="connectionString">一个有效的数据库连接字符</param>/// <param name="commandText">存储过程名或SQL语句</param>/// <returns>参数数组</returns>public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (commandText == null || commandText.Length == 0) throw new ArgumentNullException("commandText");string hashKey = connectionString + ":" + commandText;SqlParameter[] cachedParameters = paramCache[hashKey] as SqlParameter[];if (cachedParameters == null){return null;}else{return CloneParameters(cachedParameters);}}#endregion 缓存方法结束#region 检索指定的存储过程的参数集/// <summary>/// 返回指定的存储过程的参数集/// </summary>/// <remarks>/// 这个方法将查询数据库,并将信息存储到缓存./// </remarks>/// <param name="connectionString">一个有效的数据库连接字符</param>/// <param name="spName">存储过程名</param>/// <returns>返回SqlParameter参数数组</returns>public static SqlParameter[] GetSpParameterSet(string connectionString, string spName){return GetSpParameterSet(connectionString, spName, false);}/// <summary>/// 返回指定的存储过程的参数集/// </summary>/// <remarks>/// 这个方法将查询数据库,并将信息存储到缓存./// </remarks>/// <param name="connectionString">一个有效的数据库连接字符.</param>/// <param name="spName">存储过程名</param>/// <param name="includeReturnValueParameter">是否包含返回值参数</param>/// <returns>返回SqlParameter参数数组</returns>public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter){if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");using (SqlConnection connection = new SqlConnection(connectionString)){return GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);}}/// <summary>/// [内部]返回指定的存储过程的参数集(使用连接对象)./// </summary>/// <remarks>/// 这个方法将查询数据库,并将信息存储到缓存./// </remarks>/// <param name="connection">一个有效的数据库连接字符</param>/// <param name="spName">存储过程名</param>/// <returns>返回SqlParameter参数数组</returns>internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName){return GetSpParameterSet(connection, spName, false);}/// <summary>/// [内部]返回指定的存储过程的参数集(使用连接对象)/// </summary>/// <remarks>/// 这个方法将查询数据库,并将信息存储到缓存./// </remarks>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名</param>/// <param name="includeReturnValueParameter">/// 是否包含返回值参数/// </param>/// <returns>返回SqlParameter参数数组</returns>internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter){if (connection == null) throw new ArgumentNullException("connection");using (SqlConnection clonedConnection = (SqlConnection)((ICloneable)connection).Clone()){return GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);}}/// <summary>/// [私有]返回指定的存储过程的参数集(使用连接对象)/// </summary>/// <param name="connection">一个有效的数据库连接对象</param>/// <param name="spName">存储过程名</param>/// <param name="includeReturnValueParameter">是否包含返回值参数</param>/// <returns>返回SqlParameter参数数组</returns>private static SqlParameter[] GetSpParameterSetInternal(SqlConnection connection, string spName, bool includeReturnValueParameter){if (connection == null) throw new ArgumentNullException("connection");if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");string hashKey = connection.ConnectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");SqlParameter[] cachedParameters;cachedParameters = paramCache[hashKey] as SqlParameter[];if (cachedParameters == null){SqlParameter[] spParameters = DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);paramCache[hashKey] = spParameters;cachedParameters = spParameters;}return CloneParameters(cachedParameters);}#endregion 参数集检索结束}
}
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