功能特点

表结构设计，数据维护，ddl生成，加密数据库支持，sqlite2,3支持

唯一缺憾，收费，有试用期

破解方法：

注册表删除 HKEY_CURRENT_USER\SharpPlus\SqliteDev 下的 StartDate 可继续使用

    protected void Page_Load(object sender, EventArgs e){//这个文件是预先生成的数据库文件string sqliteFilePath = "Data Source=" + Server.MapPath("~/App_Data/demo2012.db");DataSet ds = new DataSet();MSCL.SqliteHelper sqlite = new MSCL.SqliteHelper(sqliteFilePath);ds = sqlite.ExecuteDataSet("Select * From LoginTable",CommandType.Text);gv1.DataSource = ds;gv1.DataBind();}

using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SQLite;
using System.Data;
using System.Data.Common;namespace MSCL
{/// <summary>   /// 本类为SQLite数据库帮助类   /// 轻量级数据库SQLite的连接字符串写法："Data Source=D:\database\test.s3db"   /// 轻量级数据库SQLite的加密后的连接字符串写法："Data Source=Maximus.db;Version=3;Password=myPassword;"   /// </summary>   public class SqliteHelper{//数据库连接字符串   private readonly string _conn = string.Empty;public SqliteHelper(string connectionString){_conn = connectionString;}#region ExecuteNonQuery/// <summary>   /// 执行数据库操作(新增、更新或删除)   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="cmd">SqlCommand对象</param>   /// <returns>所受影响的行数</returns>   public int ExecuteNonQuery(SQLiteCommand cmd){int result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, cmd.CommandType, cmd.CommandText);try{result = cmd.ExecuteNonQuery();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}/// <summary>   /// 执行数据库操作(新增、更新或删除)   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <returns>所受影响的行数</returns>   public int ExecuteNonQuery(string commandText, CommandType commandType){int result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteCommand cmd = new SQLiteCommand();using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, commandType, commandText);try{result = cmd.ExecuteNonQuery();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}/// <summary>   /// 执行数据库操作(新增、更新或删除)   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <param name="cmdParms">SQL参数对象</param>   /// <returns>所受影响的行数</returns>   public int ExecuteNonQuery(string commandText, CommandType commandType, params SQLiteParameter[] cmdParms){int result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteCommand cmd = new SQLiteCommand();using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, commandType, commandText, cmdParms);try{result = cmd.ExecuteNonQuery();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}#endregion#region ExecuteScalar/// <summary>   /// 执行数据库操作(新增、更新或删除)同时返回执行后查询所得的第1行第1列数据   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="cmd">SqlCommand对象</param>   /// <returns>查询所得的第1行第1列数据</returns>   public object ExecuteScalar(SQLiteCommand cmd){object result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, cmd.CommandType, cmd.CommandText);try{result = cmd.ExecuteScalar();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}/// <summary>   /// 执行数据库操作(新增、更新或删除)同时返回执行后查询所得的第1行第1列数据   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <returns>查询所得的第1行第1列数据</returns>   public object ExecuteScalar(string commandText, CommandType commandType){object result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteCommand cmd = new SQLiteCommand();using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, commandType, commandText);try{result = cmd.ExecuteScalar();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}/// <summary>   /// 执行数据库操作(新增、更新或删除)同时返回执行后查询所得的第1行第1列数据   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <param name="cmdParms">SQL参数对象</param>   /// <returns>查询所得的第1行第1列数据</returns>   public object ExecuteScalar(string commandText, CommandType commandType, params SQLiteParameter[] cmdParms){object result = 0;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteCommand cmd = new SQLiteCommand();using (SQLiteConnection con = new SQLiteConnection(_conn)){SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, true, commandType, commandText);try{result = cmd.ExecuteScalar();trans.Commit();}catch (Exception ex){trans.Rollback();throw ex;}}return result;}#endregion#region ExecuteReader/// <summary>   /// 执行数据库查询，返回SqlDataReader对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="cmd">SqlCommand对象</param>   /// <returns>SqlDataReader对象</returns>   public DbDataReader ExecuteReader(SQLiteCommand cmd){DbDataReader reader = null;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");SQLiteConnection con = new SQLiteConnection(_conn);SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, false, cmd.CommandType, cmd.CommandText);try{reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);}catch (Exception ex){throw ex;}return reader;}/// <summary>   /// 执行数据库查询，返回SqlDataReader对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <returns>SqlDataReader对象</returns>   public DbDataReader ExecuteReader(string commandText, CommandType commandType){DbDataReader reader = null;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteConnection con = new SQLiteConnection(_conn);SQLiteCommand cmd = new SQLiteCommand();SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, false, commandType, commandText);try{reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);}catch (Exception ex){throw ex;}return reader;}/// <summary>   /// 执行数据库查询，返回SqlDataReader对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <param name="cmdParms">SQL参数对象</param>   /// <returns>SqlDataReader对象</returns>   public DbDataReader ExecuteReader(string commandText, CommandType commandType, params SQLiteParameter[] cmdParms){DbDataReader reader = null;if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");SQLiteConnection con = new SQLiteConnection(_conn);SQLiteCommand cmd = new SQLiteCommand();SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, false, commandType, commandText, cmdParms);try{reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);}catch (Exception ex){throw ex;}return reader;}#endregion#region ExecuteDataSet/// <summary>   /// 执行数据库查询，返回DataSet对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="cmd">SqlCommand对象</param>   /// <returns>DataSet对象</returns>   public DataSet ExecuteDataSet(SQLiteCommand cmd){DataSet ds = new DataSet();SQLiteConnection con = new SQLiteConnection(_conn);SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, false, cmd.CommandType, cmd.CommandText);try{SQLiteDataAdapter sda = new SQLiteDataAdapter(cmd);sda.Fill(ds);}catch (Exception ex){throw ex;}finally{if (cmd.Connection != null){if (cmd.Connection.State == ConnectionState.Open){cmd.Connection.Close();}}}return ds;}/// <summary>   /// 执行数据库查询，返回DataSet对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <returns>DataSet对象</returns>   public DataSet ExecuteDataSet(string commandText, CommandType commandType){if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");DataSet ds = new DataSet();SQLiteConnection con = new SQLiteConnection(_conn);SQLiteCommand cmd = new SQLiteCommand();SQLiteTransaction trans = null;PrepareCommand(cmd, con, ref trans, false, commandType, commandText);try{SQLiteDataAdapter sda = new SQLiteDataAdapter(cmd);sda.Fill(ds);}catch (Exception ex){throw ex;}finally{if (con != null){if (con.State == ConnectionState.Open){con.Close();}}}return ds;}/// <summary>   /// 执行数据库查询，返回DataSet对象   /// </summary>   /// <param name="connectionString">连接字符串</param>   /// <param name="commandText">执行语句或存储过程名</param>   /// <param name="commandType">执行类型</param>   /// <param name="cmdParms">SQL参数对象</param>   /// <returns>DataSet对象</returns>   public DataSet ExecuteDataSet(string commandText, CommandType commandType, params SQLiteParameter[] cmdParms){if (string.IsNullOrEmpty(_conn))throw new ArgumentNullException("Connection string is missing.");if (string.IsNullOrEmpty(commandText))throw new ArgumentNullException("commandText");DataSet ds = new DataSet();SQLiteConnection con = null;SQLiteCommand cmd = new SQLiteCommand();SQLiteTransaction trans = null;try{con = new SQLiteConnection(_conn);PrepareCommand(cmd, con, ref trans, false, commandType, commandText, cmdParms);SQLiteDataAdapter sda = new SQLiteDataAdapter(cmd);sda.Fill(ds);}catch (Exception ex){throw ex;}finally{if (con != null){if (con.State == ConnectionState.Open){con.Close();}}}return ds;}#endregion/// <summary>   /// 通用分页查询方法   /// </summary>   /// <param name="connString">连接字符串</param>   /// <param name="tableName">表名</param>   /// <param name="strColumns">查询字段名</param>   /// <param name="strWhere">where条件</param>   /// <param name="strOrder">排序条件</param>   /// <param name="pageSize">每页数据数量</param>   /// <param name="currentIndex">当前页数</param>   /// <param name="recordOut">数据总量</param>   /// <returns>DataTable数据表</returns>   public DataTable SelectPaging(string tableName, string strColumns, string strWhere, string strOrder, int pageSize, int currentIndex, out int recordOut){DataTable dt = new DataTable();//查询总数   string countSql = "select count(*) from " + tableName + " where {0}";countSql = String.Format(countSql, strWhere);recordOut = Convert.ToInt32(ExecuteScalar(countSql, CommandType.Text));//分页   string pagingTemplate = "select {0} from {1} where {2} order by {3} limit {4} offset {5} ";int offsetCount = (currentIndex - 1) * pageSize;string commandText = String.Format(pagingTemplate, strColumns, tableName, strWhere, strOrder, pageSize.ToString(), offsetCount.ToString());using (DbDataReader reader = ExecuteReader(commandText, CommandType.Text)){if (reader != null){dt.Load(reader);}}return dt;}/// <summary>   /// 预处理Command对象,数据库链接,事务,需要执行的对象,参数等的初始化   /// </summary>   /// <param name="cmd">Command对象</param>   /// <param name="conn">Connection对象</param>   /// <param name="trans">Transcation对象</param>   /// <param name="useTrans">是否使用事务</param>   /// <param name="cmdType">SQL字符串执行类型</param>   /// <param name="cmdText">SQL Text</param>   /// <param name="cmdParms">SQLiteParameters to use in the command</param>   private void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, ref SQLiteTransaction trans, bool useTrans, CommandType cmdType, string cmdText, params SQLiteParameter[] cmdParms){if (conn.State != ConnectionState.Open)conn.Open();cmd.Connection = conn;cmd.CommandText = cmdText;if (useTrans){trans = conn.BeginTransaction(IsolationLevel.ReadCommitted);cmd.Transaction = trans;}cmd.CommandType = cmdType;if (cmdParms != null){foreach (SQLiteParameter parm in cmdParms)cmd.Parameters.Add(parm);}}}
}