SQLiteHelper public class SQLiteHelper{/// <summary>/// ConnectionString样¨´例：阰Datasource=Test.db3;Pooling=true;FailIfMissing=false/// </summary>public static string path = System.AppDomain.CurrentDomain.BaseDirectory + "Dal\\x2010.dll";public static string ConnectionString = "Data Source="+path+";Pooling=true;FailIfMissing=false";private static void PrepareCommand(SQLiteCommand cmd, SQLiteConnection conn, string cmdText, params SQLiteParameter[] p){if (conn.State != ConnectionState.Open)conn.Open();cmd.Parameters.Clear();cmd.Connection = conn;cmd.CommandText = cmdText;cmd.CommandType = CommandType.Text;cmd.CommandTimeout = 30;if (p != null){foreach (object parm in p)//cmd.Parameters.AddWithValue(string.Empty, parm);cmd.Parameters.Add(parm);}}public static DataSet ExecuteQuery(string cmdText, params SQLiteParameter[] p){using (SQLiteConnection conn = new SQLiteConnection(ConnectionString)){using (SQLiteCommand command = new SQLiteCommand()){DataSet ds = new DataSet();PrepareCommand(command, conn, cmdText, p);SQLiteDataAdapter da = new SQLiteDataAdapter(command);da.Fill(ds);return ds;}}}public static int ExecuteNonQuery(string cmdText, params SQLiteParameter[] p){using (SQLiteConnection conn = new SQLiteConnection(ConnectionString)){using (SQLiteCommand command = new SQLiteCommand()){PrepareCommand(command, conn, cmdText, p);return command.ExecuteNonQuery();}}}public static SQLiteDataReader ExecuteReader(string cmdText, params SQLiteParameter[] p){using (SQLiteConnection conn = new SQLiteConnection(ConnectionString)){using (SQLiteCommand command = new SQLiteCommand()){PrepareCommand(command, conn, cmdText, p);return command.ExecuteReader(CommandBehavior.CloseConnection);}}}public static object ExecuteScalar(string cmdText, params SQLiteParameter [] p){using (SQLiteConnection conn = new SQLiteConnection(ConnectionString)){using (SQLiteCommand command = new SQLiteCommand()){PrepareCommand(command, conn, cmdText, p);return command.ExecuteScalar();}}}

sqlCREATE TABLE "tb_nodes" (
"id"  INTEGER,
"fid"  INTEGER,
"NodeName"  TEXT(50),
"Remark"  TEXT(500),
PRIMARY KEY ("id" ASC)
);

/// <summary>/// 添ｬｨｪ加ó一?条?数簓据Y/// </summary>/// <param name="node"></param>/// <returns></returns>public int NodeAdd(Model.Nodes node){if (node != null){string sql = "insert into tb_Nodes(fid,NodeName,Remark) values (@fid,@NodeName,@Remark);select last_insert_rowid();";SQLiteParameter[] parameter = {new SQLiteParameter("@fid",node.fid),new SQLiteParameter("@NodeName",node .NodeName),new SQLiteParameter("@Remark",node .Remark)};object i = Dal.SQLiteHelper.ExecuteScalar(sql, parameter);if (i != null)return Convert.ToInt16(i);elsereturn 0;}elsereturn 0;}/// <summary>/// 修T改?一ｰ?条?数簓据Y/// </summary>/// <param name="node"></param>/// <returns></returns>public int NodeUpdate(Model.Nodes node){if (node != null){string sql = "update tb_Nodes set fid=@fid,NodeName=@NodeName,Remark=@Remark where id=@id ";SQLiteParameter[] parameter = {new SQLiteParameter("@id",node.id ),new SQLiteParameter("@fid",node.fid),new SQLiteParameter("@NodeName",node .NodeName),new SQLiteParameter("@Remark",node .Remark)};int i = Dal.SQLiteHelper.ExecuteNonQuery(sql, parameter);return i;}elsereturn 0;}/// <summary>/// 删ｦ?除yid为aNodeId的?数簓据Y/// </summary>/// <param name="NodeId"></param>/// <returns></returns>public int NodeDelete(int NodeId){string sql = "delete from tb_Nodes where id=@NodeId";SQLiteParameter[] parameter = { new SQLiteParameter("@NodeId",NodeId)};int i= Dal.SQLiteHelper.ExecuteNonQuery(sql,parameter);return i;}