一.中文注釋

using System;
using System.Data;
using System.Xml;
using System.Data.SqlClient;
using System.Collections;namespace Microsoft.ApplicationBlocks.Data.Ch
{/// <summary>/// SqlServer數據訪問幫助類/// </summary>public sealed class SqlHelper{#region 私有構造函數和方法private SqlHelper() { }/// <summary>/// 將SqlParameter參數數組(參數值)分配給SqlCommand命令./// 這個方法將給任何一個參數分配DBNull.Value;  /// 該操作將阻止默認值的使用./// </summary>/// <param name="command">命令名</param>/// <param name="commandParameters">SqlParameters數組</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){// 檢查未分配值的輸出參數,將其分配以DBNull.Value.if ((p.Direction == ParameterDirection.InputOutput || p.Direction == ParameterDirection.Input) &&(p.Value == null)){p.Value = DBNull.Value;}command.Parameters.Add(p);}}}}/// <summary>/// 將DataRow類型的列值分配到SqlParameter參數數組./// </summary>/// <param name="commandParameters">要分配值的SqlParameter參數數組</param>/// <param name="dataRow">將要分配給存儲過程參數的DataRow</param>private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow){if ((commandParameters == null) || (dataRow == null)){return;}int i = 0;// 設置參數值foreach (SqlParameter commandParameter in commandParameters){// 創建參數名稱,如果不存在,只拋出一個異常.if (commandParameter.ParameterName == null ||commandParameter.ParameterName.Length <= 1)throw new Exception(string.Format("請提供參數{0}一個有效的名稱{1}.", i, commandParameter.ParameterName));// 從dataRow的表中獲取為參數數組中數組名稱的列的索引.// 如果存在和參數名稱相同的列,則將列值賦給當前名稱的參數.if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];i++;}}/// <summary>/// 將一個對象數組分配給SqlParameter參數數組./// </summary>/// <param name="commandParameters">要分配值的SqlParameter參數數組</param>/// <param name="parameterValues">將要分配給存儲過程參數的對象數組</param>private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues){if ((commandParameters == null) || (parameterValues == null)){return;}// 確保對象數組個數與參數個數匹配,如果不匹配,拋出一個異常.if (commandParameters.Length != parameterValues.Length){throw new ArgumentException("參數值個數與參數不匹配.");}// 給參數賦值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>/// 預處理用戶提供的命令,數據庫連接/事務/命令類型/參數/// </summary>/// <param name="command">要處理的SqlCommand</param>/// <param name="connection">數據庫連接</param>/// <param name="transaction">一個有效的事務或者是null值</param>/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>/// <param name="commandText">存儲過程名或都T-SQL命令文本</param>/// <param name="commandParameters">和命令相關聯的SqlParameter參數數組,如果沒有參數為'null'</param>/// <param name="mustCloseConnection"><c>true</c> 如果連接是打開的,則為true,其它情況下為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;}// 給命令分配一個數據庫連接.command.Connection = connection;// 設置命令文本(存儲過程名或SQL語句)command.CommandText = commandText;// 分配事務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;}// 設置命令類型.command.CommandType = commandType;// 分配命令參數if (commandParameters != null){AttachParameters(command, commandParameters);}return;}#endregion 私有構造函數和方法結束#region ExecuteNonQuery命令/// <summary>/// 執行指定連接字符串,類型的SqlCommand./// </summary>/// <remarks>/// 示例: ///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>/// <param name="commandText">存儲過程名稱或SQL語句</param>/// <returns>返回命令影響的行數</returns>public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText){return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定連接字符串,類型的SqlCommand.如果沒有提供參數,不返回結果./// </summary>/// <remarks>/// 示例: ///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本, 其它.)</param>/// <param name="commandText">存儲過程名稱或SQL語句</param>/// <param name="commandParameters">SqlParameter參數數組</param>/// <returns>返回命令影響的行數</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>/// 執行指定連接字符串的存儲過程,將對象數組的值賦給存儲過程參數,/// 此方法需要在參數緩存方法中探索參數并生成參數./// </summary>/// <remarks>/// 這個方法沒有提供訪問輸出參數和返回值./// 示例: ///  int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串/param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配到存儲過程輸入參數的對象數組</param>/// <returns>返回受影響的行數</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");// 如果存在參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從探索存儲過程參數(加載到緩存)并分配給存儲過程參數數組.SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數情況下return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定數據庫連接對象的命令/// </summary>/// <remarks>/// 示例: ///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回影響的行數</returns>public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText){return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接對象的命令/// </summary>/// <remarks>/// 示例: ///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>/// <param name="commandText">T存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">SqlParamter參數數組</param>/// <returns>返回影響的行數</returns>public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");// 創建SqlCommand命令,并進行預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// Finally, execute the commandint retval = cmd.ExecuteNonQuery();// 清除參數,以便再次使用.cmd.Parameters.Clear();if (mustCloseConnection)connection.Close();return retval;}/// <summary>/// 執行指定數據庫連接對象的命令,將對象數組的值賦給存儲過程參數./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值/// 示例: ///  int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回影響的行數</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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 給存儲過程分配參數值AssignParameterValues(commandParameters, parameterValues);return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行帶事務的SqlCommand./// </summary>/// <remarks>/// 示例.: ///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");/// </remarks>/// <param name="transaction">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回影響的行數/returns>public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行帶事務的SqlCommand(指定參數)./// </summary>/// <remarks>/// 示例: ///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型(存儲過程,命令文本或其它.)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">SqlParamter參數數組</param>/// <returns>返回影響的行數</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");// 預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 執行int retval = cmd.ExecuteNonQuery();// 清除參數集,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 執行帶事務的SqlCommand(指定參數值)./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值/// 示例: ///  int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);/// </remarks>/// <param name="transaction">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回受影響的行數</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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteNonQuery方法結束#region ExecuteDataset方法/// <summary>/// 執行指定數據庫連接字符串的命令,返回DataSet./// </summary>/// <remarks>/// 示例: ///  DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回一個包含結果集的DataSet</returns>public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText){return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接字符串的命令,返回DataSet./// </summary>/// <remarks>/// 示例:///  DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">SqlParamters參數數組</param>/// <returns>返回一個包含結果集的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");// 創建并打開數據庫連接對象,操作完成釋放對象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 調用指定數據庫連接字符串重載方法.return ExecuteDataset(connection, commandType, commandText, commandParameters);}}/// <summary>/// 執行指定數據庫連接字符串的命令,直接提供參數值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值./// 示例:///  DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回一個包含結果集的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)){// 從緩存中檢索存儲過程參數SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 給存儲過程參數分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定數據庫連接對象的命令,返回DataSet./// </summary>/// <remarks>/// 示例: ///  DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <returns>返回一個包含結果集的DataSet</returns>public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText){return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接對象的命令,指定存儲過程參數,返回DataSet./// </summary>/// <remarks>/// 示例: ///  DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <param name="commandParameters">SqlParamter參數數組</param>/// <returns>返回一個包含結果集的DataSet</returns>public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");// 預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 創建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>/// 執行指定數據庫連接對象的命令,指定參數值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸入參數和返回值./// 示例.: ///  DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回一個包含結果集的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)){// 比緩存中加載存儲過程參數SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 給存儲過程參數分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定事務的命令,返回DataSet./// </summary>/// <remarks>/// 示例: ///  DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <returns>返回一個包含結果集的DataSet</returns>public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定事務的命令,指定參數,返回DataSet./// </summary>/// <remarks>/// 示例: ///  DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <param name="commandParameters">SqlParamter參數數組</param>/// <returns>返回一個包含結果集的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");// 預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 創建 DataAdapter & DataSetusing (SqlDataAdapter da = new SqlDataAdapter(cmd)){DataSet ds = new DataSet();da.Fill(ds);cmd.Parameters.Clear();return ds;}}/// <summary>/// 執行指定事務的命令,指定參數值,返回DataSet./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸入參數和返回值./// 示例.: ///  DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">事務</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回一個包含結果集的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)){// 從緩存中加載存儲過程參數SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 給存儲過程參數分配值AssignParameterValues(commandParameters, parameterValues);return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteDataset數據集命令結束#region ExecuteReader 數據閱讀器/// <summary>/// 枚舉,標識數據庫連接是由SqlHelper提供還是由調用者提供/// </summary>private enum SqlConnectionOwnership{/// <summary>由SqlHelper提供連接</summary>Internal,/// <summary>由調用者提供連接</summary>External}/// <summary>/// 執行指定數據庫連接對象的數據閱讀器./// </summary>/// <remarks>/// 如果是SqlHelper打開連接,當連接關閉DataReader也將關閉./// 如果是調用都打開連接,DataReader由調用都管理./// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="transaction">一個有效的事務,或者為 'null'</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <param name="commandParameters">SqlParameters參數數組,如果沒有參數則為'null'</param>/// <param name="connectionOwnership">標識數據庫連接對象是由調用者提供還是由SqlHelper提供</param>/// <returns>返回包含結果集的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;// 創建命令SqlCommand cmd = new SqlCommand();try{PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 創建數據閱讀器SqlDataReader dataReader;if (connectionOwnership == SqlConnectionOwnership.External){dataReader = cmd.ExecuteReader();}else{dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);}// 清除參數,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>/// 執行指定數據庫連接字符串的數據閱讀器./// </summary>/// <remarks>/// 示例: ///  SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <returns>返回包含結果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText){return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接字符串的數據閱讀器,指定參數./// </summary>/// <remarks>/// 示例: ///  SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <param name="commandParameters">SqlParamter參數數組(new SqlParameter("@prodid", 24))</param>/// <returns>返回包含結果集的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>/// 執行指定數據庫連接字符串的數據閱讀器,指定參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數./// 示例: ///  SqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回包含結果集的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>/// 執行指定數據庫連接對象的數據閱讀器./// </summary>/// <remarks>/// 示例: ///  SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名或T-SQL語句</param>/// <returns>返回包含結果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText){return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// [調用者方式]執行指定數據庫連接對象的數據閱讀器,指定參數./// </summary>/// <remarks>/// 示例: ///  SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandParameters">SqlParamter參數數組</param>/// <returns>返回包含結果集的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>/// [調用者方式]執行指定數據庫連接對象的數據閱讀器,指定參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數./// 示例: ///  SqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">T存儲過程名</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回包含結果集的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>/// [調用者方式]執行指定數據庫事務的數據閱讀器,指定參數值./// </summary>/// <remarks>/// 示例: ///  SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回包含結果集的SqlDataReader</returns>public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText){return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// [調用者方式]執行指定數據庫事務的數據閱讀器,指定參數./// </summary>/// <remarks>/// 示例: ///   SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回包含結果集的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>/// [調用者方式]執行指定數據庫事務的數據閱讀器,指定參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  SqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回包含結果集的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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);AssignParameterValues(commandParameters, parameterValues);return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteReader(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteReader數據閱讀器#region ExecuteScalar 返回結果集中的第一行第一列/// <summary>/// 執行指定數據庫連接字符串的命令,返回結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">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回結果集中的第一行第一列</returns>public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText){// 執行參數為空的方法return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接字符串的命令,指定參數,返回結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">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回結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");// 創建并打開數據庫連接對象,操作完成釋放對象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 調用指定數據庫連接字符串重載方法.return ExecuteScalar(connection, commandType, commandText, commandParameters);}}/// <summary>/// 執行指定數據庫連接字符串的命令,指定參數值,返回結果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回結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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定數據庫連接對象的命令,返回結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">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回結果集中的第一行第一列</returns>public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText){// 執行參數為空的方法return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接對象的命令,指定參數,返回結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">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回結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");// 創建SqlCommand命令,并進行預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 執行SqlCommand命令,并返回結果.object retval = cmd.ExecuteScalar();// 清除參數,以便再次使用.cmd.Parameters.Clear();if (mustCloseConnection)connection.Close();return retval;}/// <summary>/// 執行指定數據庫連接對象的命令,指定參數值,返回結果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回結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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteScalar(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定數據庫事務的命令,返回結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">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <returns>返回結果集中的第一行第一列</returns>public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText){// 執行參數為空的方法return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫事務的命令,指定參數,返回結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">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回結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");// 創建SqlCommand命令,并進行預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 執行SqlCommand命令,并返回結果.object retval = cmd.ExecuteScalar();// 清除參數,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 執行指定數據庫事務的命令,指定參數值,返回結果集中的第一行第一列./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回結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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// PPull the parameters for this stored procedure from the parameter cache ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteScalar   #region ExecuteXmlReader XML閱讀器/// <summary>/// 執行指定數據庫連接對象的SqlCommand命令,并產生一個XmlReader對象做為結果集返回./// </summary>/// <remarks>/// 示例: ///  XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>/// <returns>返回XmlReader結果集對象.</returns>public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText){// 執行參數為空的方法return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫連接對象的SqlCommand命令,并產生一個XmlReader對象做為結果集返回,指定參數./// </summary>/// <remarks>/// 示例: ///  XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回XmlReader結果集對象.</returns>public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters){if (connection == null) throw new ArgumentNullException("connection");bool mustCloseConnection = false;// 創建SqlCommand命令,并進行預處理SqlCommand cmd = new SqlCommand();try{PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);// 執行命令XmlReader retval = cmd.ExecuteXmlReader();// 清除參數,以便再次使用.cmd.Parameters.Clear();return retval;}catch{if (mustCloseConnection)connection.Close();throw;}}/// <summary>/// 執行指定數據庫連接對象的SqlCommand命令,并產生一個XmlReader對象做為結果集返回,指定參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱 using "FOR XML AUTO"</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回XmlReader結果集對象.</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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定數據庫事務的SqlCommand命令,并產生一個XmlReader對象做為結果集返回./// </summary>/// <remarks>/// 示例: ///  XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders");/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>/// <returns>返回XmlReader結果集對象.</returns>public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText){// 執行參數為空的方法return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null);}/// <summary>/// 執行指定數據庫事務的SqlCommand命令,并產生一個XmlReader對象做為結果集返回,指定參數./// </summary>/// <remarks>/// 示例: ///  XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句 using "FOR XML AUTO"</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <returns>返回XmlReader結果集對象.</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");// 創建SqlCommand命令,并進行預處理SqlCommand cmd = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 執行命令XmlReader retval = cmd.ExecuteXmlReader();// 清除參數,以便再次使用.cmd.Parameters.Clear();return retval;}/// <summary>/// 執行指定數據庫事務的SqlCommand命令,并產生一個XmlReader對象做為結果集返回,指定參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  XmlReader r = ExecuteXmlReader(trans, "GetOrders", 24, 36);/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="spName">存儲過程名稱</param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</param>/// <returns>返回一個包含結果集的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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{// 沒有參數值return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);}}#endregion ExecuteXmlReader 閱讀器結束#region FillDataset 填充數據集/// <summary>/// 執行指定數據庫連接字符串的命令,映射數據表并填充數據集./// </summary>/// <remarks>/// 示例: ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)</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");// 創建并打開數據庫連接對象,操作完成釋放對象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 調用指定數據庫連接字符串重載方法.FillDataset(connection, commandType, commandText, dataSet, tableNames);}}/// <summary>/// 執行指定數據庫連接字符串的命令,映射數據表并填充數據集.指定命令參數./// </summary>/// <remarks>/// 示例: ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </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");// 創建并打開數據庫連接對象,操作完成釋放對象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 調用指定數據庫連接字符串重載方法.FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);}}/// <summary>/// 執行指定數據庫連接字符串的命令,映射數據表并填充數據集,指定存儲過程參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);/// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>   /// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</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");// 創建并打開數據庫連接對象,操作完成釋放對象.using (SqlConnection connection = new SqlConnection(connectionString)){connection.Open();// 調用指定數據庫連接字符串重載方法.FillDataset(connection, spName, dataSet, tableNames, parameterValues);}}/// <summary>/// 執行指定數據庫連接對象的命令,映射數據表并填充數據集./// </summary>/// <remarks>/// 示例: ///  FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>   public static void FillDataset(SqlConnection connection, CommandType commandType,string commandText, DataSet dataSet, string[] tableNames){FillDataset(connection, commandType, commandText, dataSet, tableNames, null);}/// <summary>/// 執行指定數據庫連接對象的命令,映射數據表并填充數據集,指定參數./// </summary>/// <remarks>/// 示例: ///  FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</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>/// 執行指定數據庫連接對象的命令,映射數據表并填充數據集,指定存儲過程參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);}else{// 沒有參數值FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);}}/// <summary>/// 執行指定數據庫事務的命令,映射數據表并填充數據集./// </summary>/// <remarks>/// 示例: ///  FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>public static void FillDataset(SqlTransaction transaction, CommandType commandType,string commandText,DataSet dataSet, string[] tableNames){FillDataset(transaction, commandType, commandText, dataSet, tableNames, null);}/// <summary>/// 執行指定數據庫事務的命令,映射數據表并填充數據集,指定參數./// </summary>/// <remarks>/// 示例: ///  FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new SqlParameter("@prodid", 24));/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</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>/// 執行指定數據庫事務的命令,映射數據表并填充數據集,指定存儲過程參數值./// </summary>/// <remarks>/// 此方法不提供訪問存儲過程輸出參數和返回值參數.////// 示例: ///  FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);/// </remarks>/// <param name="transaction">一個有效的連接事務</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>/// <param name="parameterValues">分配給存儲過程輸入參數的對象數組</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");// 如果有參數值if ((parameterValues != null) && (parameterValues.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 給存儲過程參數賦值AssignParameterValues(commandParameters, parameterValues);// 調用重載方法FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);}else{// 沒有參數值FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);}}/// <summary>/// [私有方法][內部調用]執行指定數據庫連接對象/事務的命令,映射數據表并填充數據集,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">一個有效的數據庫連接對象</param>/// <param name="transaction">一個有效的連接事務</param>/// <param name="commandType">命令類型 (存儲過程,命令文本或其它)</param>/// <param name="commandText">存儲過程名稱或T-SQL語句</param>/// <param name="dataSet">要填充結果集的DataSet實例</param>/// <param name="tableNames">表映射的數據表數組/// 用戶定義的表名 (可有是實際的表名.)/// </param>/// <param name="commandParameters">分配給命令的SqlParamter參數數組</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");// 創建SqlCommand命令,并進行預處理SqlCommand command = new SqlCommand();bool mustCloseConnection = false;PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);// 執行命令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();}}// 填充數據集使用默認表名稱dataAdapter.Fill(dataSet);// 清除參數,以便再次使用.command.Parameters.Clear();}if (mustCloseConnection)connection.Close();}#endregion#region UpdateDataset 更新數據集/// <summary>/// 執行數據集更新到數據庫,指定inserted, updated, or deleted命令./// </summary>/// <remarks>/// 示例: ///  UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");/// </remarks>/// <param name="insertCommand">[追加記錄]一個有效的T-SQL語句或存儲過程</param>/// <param name="deleteCommand">[刪除記錄]一個有效的T-SQL語句或存儲過程</param>/// <param name="updateCommand">[更新記錄]一個有效的T-SQL語句或存儲過程</param>/// <param name="dataSet">要更新到數據庫的DataSet</param>/// <param name="tableName">要更新到數據庫的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");// 創建SqlDataAdapter,當操作完成后釋放.using (SqlDataAdapter dataAdapter = new SqlDataAdapter()){// 設置數據適配器命令dataAdapter.UpdateCommand = updateCommand;dataAdapter.InsertCommand = insertCommand;dataAdapter.DeleteCommand = deleteCommand;// 更新數據集改變到數據庫dataAdapter.Update(dataSet, tableName);// 提交所有改變到數據集.dataSet.AcceptChanges();}}#endregion#region CreateCommand 創建一條SqlCommand命令/// <summary>/// 創建SqlCommand命令,指定數據庫連接對象,存儲過程名和參數./// </summary>/// <remarks>/// 示例: ///  SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");/// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="sourceColumns">源表的列名稱數組</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");// 創建命令SqlCommand cmd = new SqlCommand(spName, connection);cmd.CommandType = CommandType.StoredProcedure;// 如果有參數值if ((sourceColumns != null) && (sourceColumns.Length > 0)){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 將源表的列到映射到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 類型化參數(DataRow)/// <summary>/// 執行指定連接數據庫連接字符串的存儲過程,使用DataRow做為參數值,返回受影響的行數./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回影響的行數</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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫連接對象的存儲過程,使用DataRow做為參數值,返回受影響的行數./// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回影響的行數</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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫事物的存儲過程,使用DataRow做為參數值,返回受影響的行數./// </summary>/// <param name="transaction">一個有效的連接事務 object</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回影響的行數</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){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteDatasetTypedParams 類型化參數(DataRow)/// <summary>/// 執行指定連接數據庫連接字符串的存儲過程,使用DataRow做為參數值,返回DataSet./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回一個包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫連接對象的存儲過程,使用DataRow做為參數值,返回DataSet./// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回一個包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫事務的存儲過程,使用DataRow做為參數值,返回DataSet./// </summary>/// <param name="transaction">一個有效的連接事務 object</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回一個包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteDataset(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteReaderTypedParams 類型化參數(DataRow)/// <summary>/// 執行指定連接數據庫連接字符串的存儲過程,使用DataRow做為參數值,返回DataReader./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫連接對象的存儲過程,使用DataRow做為參數值,返回DataReader./// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫事物的存儲過程,使用DataRow做為參數值,返回DataReader./// </summary>/// <param name="transaction">一個有效的連接事務 object</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回包含結果集的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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteReader(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteScalarTypedParams 類型化參數(DataRow)/// <summary>/// 執行指定連接數據庫連接字符串的存儲過程,使用DataRow做為參數值,返回結果集中的第一行第一列./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回結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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫連接對象的存儲過程,使用DataRow做為參數值,返回結果集中的第一行第一列./// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回結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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫事務的存儲過程,使用DataRow做為參數值,返回結果集中的第一行第一列./// </summary>/// <param name="transaction">一個有效的連接事務 object</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回結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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteScalar(transaction, CommandType.StoredProcedure, spName);}}#endregion#region ExecuteXmlReaderTypedParams 類型化參數(DataRow)/// <summary>/// 執行指定連接數據庫連接對象的存儲過程,使用DataRow做為參數值,返回XmlReader類型的結果集./// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回XmlReader結果集對象.</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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);}}/// <summary>/// 執行指定連接數據庫事務的存儲過程,使用DataRow做為參數值,返回XmlReader類型的結果集./// </summary>/// <param name="transaction">一個有效的連接事務 object</param>/// <param name="spName">存儲過程名稱</param>/// <param name="dataRow">使用DataRow作為參數值</param>/// <returns>返回XmlReader結果集對象.</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,存儲過程必須初始化.if (dataRow != null && dataRow.ItemArray.Length > 0){// 從緩存中加載存儲過程參數,如果緩存中不存在則從數據庫中檢索參數信息并加載到緩存中. ()SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);// 分配參數值AssignParameterValues(commandParameters, dataRow);return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);}else{return SqlHelper.ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);}}#endregion}/// <summary>/// SqlHelperParameterCache提供緩存存儲過程參數,并能夠在運行時從存儲過程中探索參數./// </summary>public sealed class SqlHelperParameterCache{#region 私有方法,字段,構造函數// 私有構造函數,妨止類被實例化.private SqlHelperParameterCache() { }// 這個方法要注意private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());/// <summary>/// 探索運行時的存儲過程,返回SqlParameter參數數組./// 初始化參數值為 DBNull.Value./// </summary>/// <param name="connection">一個有效的數據庫連接</param>/// <param name="spName">存儲過程名稱</param>/// <param name="includeReturnValueParameter">是否包含返回值參數</param>/// <returns>返回SqlParameter參數數組</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();// 檢索cmd指定的存儲過程的參數信息,并填充到cmd的Parameters參數集中.SqlCommandBuilder.DeriveParameters(cmd);connection.Close();// 如果不包含返回值參數,將參數集中的每一個參數刪除.if (!includeReturnValueParameter){cmd.Parameters.RemoveAt(0);}// 創建參數數組SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count];// 將cmd的Parameters參數集復制到discoveredParameters數組.cmd.Parameters.CopyTo(discoveredParameters, 0);// 初始化參數值為 DBNull.Value.foreach (SqlParameter discoveredParameter in discoveredParameters){discoveredParameter.Value = DBNull.Value;}return discoveredParameters;}/// <summary>/// SqlParameter參數數組的深層拷貝./// </summary>/// <param name="originalParameters">原始參數數組</param>/// <returns>返回一個同樣的參數數組</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,構造函數結束#region 緩存方法/// <summary>/// 追加參數數組到緩存./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符串</param>/// <param name="commandText">存儲過程名或SQL語句</param>/// <param name="commandParameters">要緩存的參數數組</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>/// 從緩存中獲取參數數組./// </summary>/// <param name="connectionString">一個有效的數據庫連接字符</param>/// <param name="commandText">存儲過程名或SQL語句</param>/// <returns>參數數組</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 緩存方法結束#region 檢索指定的存儲過程的參數集/// <summary>/// 返回指定的存儲過程的參數集/// </summary>/// <remarks>/// 這個方法將查詢數據庫,并將信息存儲到緩存./// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符</param>/// <param name="spName">存儲過程名</param>/// <returns>返回SqlParameter參數數組</returns>public static SqlParameter[] GetSpParameterSet(string connectionString, string spName){return GetSpParameterSet(connectionString, spName, false);}/// <summary>/// 返回指定的存儲過程的參數集/// </summary>/// <remarks>/// 這個方法將查詢數據庫,并將信息存儲到緩存./// </remarks>/// <param name="connectionString">一個有效的數據庫連接字符.</param>/// <param name="spName">存儲過程名</param>/// <param name="includeReturnValueParameter">是否包含返回值參數</param>/// <returns>返回SqlParameter參數數組</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>/// [內部]返回指定的存儲過程的參數集(使用連接對象)./// </summary>/// <remarks>/// 這個方法將查詢數據庫,并將信息存儲到緩存./// </remarks>/// <param name="connection">一個有效的數據庫連接字符</param>/// <param name="spName">存儲過程名</param>/// <returns>返回SqlParameter參數數組</returns>internal static SqlParameter[] GetSpParameterSet(SqlConnection connection, string spName){return GetSpParameterSet(connection, spName, false);}/// <summary>/// [內部]返回指定的存儲過程的參數集(使用連接對象)/// </summary>/// <remarks>/// 這個方法將查詢數據庫,并將信息存儲到緩存./// </remarks>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名</param>/// <param name="includeReturnValueParameter">/// 是否包含返回值參數/// </param>/// <returns>返回SqlParameter參數數組</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]返回指定的存儲過程的參數集(使用連接對象)/// </summary>/// <param name="connection">一個有效的數據庫連接對象</param>/// <param name="spName">存儲過程名</param>/// <param name="includeReturnValueParameter">是否包含返回值參數</param>/// <returns>返回SqlParameter參數數組</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 參數集檢索結束}
}