sqlHelper类 2.0

 //===============================================================================// 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//modify by kingson . [e-mail] . 2007.04.13//===============================================================================using System;using System.Configuration;using System.Data;using System.Data.SqlClient;using System.Collections; /**//// <summary> /// The SqlHelper class is intended to encapsulate high performance, /// scalable best practices for common uses of SqlClient. /// </summary> public abstract class SqlHelper ...{ //Database connection strings public static readonly string strConnection = ConfigurationManager.ConnectionStrings["ConnectionString1"].ConnectionString; //public static readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.ConnectionStrings["SQLConnString2"].ConnectionString; //public static readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.ConnectionStrings["SQLConnString3"].ConnectionString; //public static readonly string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["SQLProfileConnString"].ConnectionString; // Hashtable to store cached parameters private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable()); ExecuteNonQuery#region ExecuteNonQuery /**//// <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> /// 使用默认连接 /// </summary> /// <param name="cmdType">命令文本类型</param> /// <param name="cmdText">命令文本</param> /// <param name="commandParameters">参数集</param> /// <returns>int</returns> public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); using (SqlConnection conn = new SqlConnection(strConnection)) ...{ PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters); int val = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); return val; } } /**//// <summary> /// 使用默认连接,CommandType默认为StoredProcedure /// </summary> /// <param name="cmdText">存储过程名</param> /// <param name="commandParameters">参数集</param> /// <returns>int</returns> public static int ExecuteNonQuery(string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); using (SqlConnection conn = new SqlConnection(strConnection)) ...{ PrepareCommand(cmd, conn, null, CommandType.StoredProcedure,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> #endregion ExecuteReader#region ExecuteReader 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 work try ...{ PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return rdr; } catch ...{ conn.Close(); throw; } } /**//// <summary> /// 使用默认连接 /// </summary> /// <param name="cmdType">命令文本类型</param> /// <param name="cmdText">命令文本</param> /// <param name="commandParameters">参数集</param> /// <returns>SqlDataReader</returns> public static SqlDataReader ExecuteReader(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); SqlConnection conn = new SqlConnection(strConnection); // 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 work try ...{ PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return rdr; } catch ...{ conn.Close(); throw; } } /**//// <summary> /// 使用默认连接,CommandType默认为StoredProcedure /// </summary> /// <param name="cmdText">存储过程名</param> /// <param name="commandParameters">参数集</param> /// <returns>SqlDataReader</returns> public static SqlDataReader ExecuteReader(string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); SqlConnection conn = new SqlConnection(strConnection); // 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 work try ...{ PrepareCommand(cmd, conn, null, CommandType.StoredProcedure, cmdText, commandParameters); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); cmd.Parameters.Clear(); return rdr; } catch ...{ conn.Close(); throw; } } #endregion ExecuteScalar#region ExecuteScalar /**//// <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> /// 使用定义好的连接字符串 /// </summary> /// <param name="cmdType">命令文本类型</param> /// <param name="cmdText">命令文本</param> /// <param name="commandParameters">参数集</param> /// <returns>object</returns> public static object ExecuteScalar(CommandType cmdType, string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); using (SqlConnection connection = new SqlConnection(strConnection)) ...{ PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters); object val = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return val; } } /**//// <summary> /// 使用定义好的连接字符串,CommandType默认为StoredProcedure /// </summary> /// <param name="cmdText">存储过程名</param> /// <param name="commandParameters">参数集</param> /// <returns>object</returns> public static object ExecuteScalar(string cmdText, params SqlParameter[] commandParameters) ...{ SqlCommand cmd = new SqlCommand(); using (SqlConnection connection = new SqlConnection(strConnection)) ...{ PrepareCommand(cmd, connection, null, CommandType.StoredProcedure, 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; } #endregion ExecuteDataSet#region ExecuteDataSet /**//// <summary> /// 返加dataset /// </summary> /// <param name="connectionString">连接字符串</param> /// <param name="cmdType">命令类型，如StoredProcedure,Text</param> /// <param name="cmdText">the stored procedure name or T-SQL command</param> /// <returns>DataSet</returns> public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText) ...{ SqlConnection SqlDataConn = new SqlConnection(connectionString); SqlCommand SqlComm = new SqlCommand(cmdText, SqlDataConn); SqlComm.CommandType = cmdType; SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } /**//// <summary> /// 使用定义好的连接字符串 /// </summary> /// <param name="cmdType">命令文本类型</param> /// <param name="cmdText">命令文本</param> /// <returns>DataSet</returns> public static DataSet ExecuteDataSet(CommandType cmdType, string cmdText) ...{ SqlConnection SqlDataConn = new SqlConnection(strConnection); SqlCommand SqlComm = new SqlCommand(cmdText, SqlDataConn); SqlComm.CommandType = cmdType; SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } /**//// <summary> /// 使用定义好的连接字符串,CommandType默认为StoredProcedure /// </summary> /// <param name="cmdText">存储过程名</param> /// <returns>object</returns> public static DataSet ExecuteDataSet(string cmdText) ...{ SqlConnection SqlDataConn = new SqlConnection(strConnection); SqlCommand SqlComm = new SqlCommand(cmdText, SqlDataConn); SqlComm.CommandType = CommandType.StoredProcedure; SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } /**//// <summary> /// 返加dataset /// </summary> /// <param name="connectionString">连接字符串</param> /// <param name="cmdType">命令类型，如StoredProcedure,Text</param> /// <param name="cmdText">the stored procedure name or T-SQL command</param> /// <param name="SQLparams">参数集</param> /// <returns>DataSet</returns> public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] SQLparams) ...{ SqlConnection SqlDataConn = new SqlConnection(connectionString); SqlCommand SqlComm = AddSqlParas(SQLparams, cmdText, cmdType, SqlDataConn); SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } public static DataSet ExecuteDataSet( CommandType cmdType, string cmdText, params SqlParameter[] SQLparams) ...{ SqlConnection SqlDataConn = new SqlConnection(strConnection); SqlCommand SqlComm = AddSqlParas(SQLparams, cmdText, cmdType, SqlDataConn); SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } /**//// <summary> /// 使用定义好的连接字符串,CommandType默认为StoredProcedure /// </summary> /// <param name="cmdText">存储过程名</param> /// <param name="commandParameters">参数集</param> /// <returns>DataSet</returns> public static DataSet ExecuteDataSet(string cmdText, params SqlParameter[] SQLparams) ...{ SqlConnection SqlDataConn = new SqlConnection(strConnection); SqlCommand SqlComm = AddSqlParas(SQLparams,cmdText,CommandType.StoredProcedure, SqlDataConn); SqlDataAdapter SqlDA = new SqlDataAdapter(SqlComm); DataSet DS = new DataSet(); SqlDA.Fill(DS); return DS; } #endregion CacheParameters#region CacheParameters /**//// <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; } #endregion GetCachedParameters#region GetCachedParameters /**//// <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; } #endregion PrepareCommand#region PrepareCommand /**//// <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); } } #endregion AddSqlParas#region AddSqlParas /**//// <summary> /// 获得一个完整的Command /// </summary> /// <param name="SqlParas">SQL的参数数组</param> /// <param name="CommandText">命令文本</param> /// <param name="IsStoredProcedure">命令文本是否是存储过程</param> /// <param name="SqlDataConn">数据连接</param> /// <returns></returns> private static SqlCommand AddSqlParas(SqlParameter[] SqlParas, string cmdText, CommandType cmdType, SqlConnection SqlDataConn) ...{ SqlCommand SqlComm = new SqlCommand(cmdText, SqlDataConn); SqlComm.CommandType = cmdType; if (SqlParas != null) ...{ foreach (SqlParameter p in SqlParas) ...{ SqlComm.Parameters.Add(p); } } return SqlComm; } #endregion }