C# SqlHelper類的數據庫操做
#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; /// 該操做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) { // 建立參數名稱,若是不存在,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的表中獲取爲參數數組中數組名稱的列的索引. // 若是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,若是不匹配,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 property if (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,數據庫鏈接/事務/命令類型/參數 /// </summary> /// <param name="command">要處理的SqlCommand</param> /// <param name="connection">數據庫鏈接</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,若是沒有參數爲'null'</param> /// <param name="mustCloseConnection"><c>true</c> 若是鏈接是打開的,則爲true,其它狀況下爲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 it if (connection.State != ConnectionState.Open) { mustCloseConnection = true; connection.Open(); } else { mustCloseConnection = false; } // 給命令分配一個數據庫鏈接. 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 數據庫鏈接 /// <summary> /// 一個有效的數據庫鏈接字符串 /// </summary> /// <returns></returns> public static string GetConnSting() { return ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString; } /// <summary> /// 一個有效的數據庫鏈接對象 /// </summary> /// <returns></returns> public static SqlConnection GetConnection() { SqlConnection Connection = new SqlConnection(SqlHelper.GetConnSting()); return Connection; } #endregion #region ExecuteNonQuery命令 /// <summary> /// 執行指定鏈接字符串,類型的SqlCommand. /// </summary> /// <remarks> /// 示例: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符串</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> /// 執行指定鏈接字符串,類型的SqlCommand.若是沒有提供參數,不返回結果. /// </summary> /// <remarks> /// 示例: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符串</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> /// 執行指定鏈接字符串的存儲過程,將對象數組的值賦給存儲過程參數, /// 此方法須要在參數緩存方法中探索參數並生成參數. /// </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">一個有效的數據庫鏈接字符串/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"); // 若是存在參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從探索存儲過程參數(加載到緩存)並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 { // 沒有參數狀況下 return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName); } } /// <summary> /// 執行指定數據庫鏈接對象的命令 /// </summary> /// <remarks> /// 示例: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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> /// 執行指定數據庫鏈接對象的命令 /// </summary> /// <remarks> /// 示例: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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"); // 建立SqlCommand命令,並進行預處理 SqlCommand cmd = new SqlCommand(); bool mustCloseConnection = false; PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection); // Finally, execute the command int retval = cmd.ExecuteNonQuery(); // 清除參數,以便再次使用. cmd.Parameters.Clear(); if (mustCloseConnection) connection.Close(); return retval; } /// <summary> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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"); // 若是有參數值 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">一個有效的數據庫鏈接對象</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">一個有效的數據庫鏈接對象</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">一個有效的數據庫鏈接對象</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定數據庫鏈接字符串的命令,返回DataSet. /// </summary> /// <remarks> /// 示例: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符串</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> /// 執行指定數據庫鏈接字符串的命令,返回DataSet. /// </summary> /// <remarks> /// 示例: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符串</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"); // 建立並打開數據庫鏈接對象,操做完成釋放對象. using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // 調用指定數據庫鏈接字符串重載方法. return ExecuteDataset(connection, commandType, commandText, commandParameters); } } /// <summary> /// 執行指定數據庫鏈接字符串的命令,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">一個有效的數據庫鏈接字符串</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> /// 執行指定數據庫鏈接對象的命令,返回DataSet. /// </summary> /// <remarks> /// 示例: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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); // 建立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> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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); // 建立 DataAdapter & DataSet using (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,標識數據庫鏈接是由SqlHelper提供仍是由調用者提供 /// </summary> private enum SqlConnectionOwnership { /// <summary>由SqlHelper提供鏈接</summary> Internal, /// <summary>由調用者提供鏈接</summary> External } /// <summary> /// 執行指定數據庫鏈接對象的數據閱讀器. /// </summary> /// <remarks> /// 若是是SqlHelper打開鏈接,當鏈接關閉DataReader也將關閉. /// 若是是調用都打開鏈接,DataReader由調用都管理. /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="transaction">一個有效的事務,或者爲 '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,若是沒有參數則爲'null'</param> /// <param name="connectionOwnership">標識數據庫鏈接對象是由調用者提供仍是由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; // 建立命令 SqlCommand cmd = new SqlCommand(); try { PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection); // 建立數據閱讀器 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> /// 執行指定數據庫鏈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">一個有效的數據庫鏈接字符串</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> /// 執行指定數據庫鏈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">一個有效的數據庫鏈接字符串</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 ourselves if (connection != null) connection.Close(); throw; } } /// <summary> /// 執行指定數據庫鏈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">一個有效的數據庫鏈接字符串</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> /// 執行指定數據庫鏈接對象的數據閱讀器. /// </summary> /// <remarks> /// 示例: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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]執行指定數據庫鏈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">一個有效的數據庫鏈接對象</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]執行指定數據庫鏈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">一個有效的數據庫鏈接對象</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">一個有效的鏈接事務</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">一個有效的鏈接事務</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">一個有效的鏈接事務</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"); // 若是有參數值 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> /// 執行指定數據庫鏈接字符串的命令,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">一個有效的數據庫鏈接字符串</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) { // 執行參數爲空的方法 return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// 執行指定數據庫鏈接字符串的命令,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">一個有效的數據庫鏈接字符串</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"); // 建立並打開數據庫鏈接對象,操做完成釋放對象. using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // 調用指定數據庫鏈接字符串重載方法. return ExecuteScalar(connection, commandType, commandText, commandParameters); } } /// <summary> /// 執行指定數據庫鏈接字符串的命令,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">一個有效的數據庫鏈接字符串</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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) { // 執行參數爲空的方法 return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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"); // 建立SqlCommand命令,並進行預處理 SqlCommand cmd = new SqlCommand(); bool mustCloseConnection = false; PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection); // 執行SqlCommand命令,並返回結果. object retval = cmd.ExecuteScalar(); // 清除參數,以便再次使用. cmd.Parameters.Clear(); if (mustCloseConnection) connection.Close(); return retval; } /// <summary> /// 執行指定數據庫鏈接對象的命令,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">一個有效的數據庫鏈接對象</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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">一個有效的鏈接事務</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) { // 執行參數爲空的方法 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">一個有效的鏈接事務</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"); // 建立SqlCommand命令,並進行預處理 SqlCommand cmd = new SqlCommand(); bool mustCloseConnection = false; PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection); // 執行SqlCommand命令,並返回結果. 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">一個有效的鏈接事務</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"); // 若是有參數值 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> /// 執行指定數據庫鏈接對象的SqlCommand命令,併產生一個XmlReader對象作爲結果集返回. /// </summary> /// <remarks> /// 示例: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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) { // 執行參數爲空的方法 return ExecuteXmlReader(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// 執行指定數據庫鏈接對象的SqlCommand命令,併產生一個XmlReader對象作爲結果集返回,指定參數. /// </summary> /// <remarks> /// 示例: /// XmlReader r = ExecuteXmlReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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; // 建立SqlCommand命令,並進行預處理 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> /// 執行指定數據庫鏈接對象的SqlCommand命令,併產生一個XmlReader對象作爲結果集返回,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">一個有效的數據庫鏈接對象</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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,併產生一個XmlReader對象作爲結果集返回. /// </summary> /// <remarks> /// 示例: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">一個有效的鏈接事務</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) { // 執行參數爲空的方法 return ExecuteXmlReader(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// 執行指定數據庫事務的SqlCommand命令,併產生一個XmlReader對象作爲結果集返回,指定參數. /// </summary> /// <remarks> /// 示例: /// XmlReader r = ExecuteXmlReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("@prodid", 24)); /// </remarks> /// <param name="transaction">一個有效的鏈接事務</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"); // 建立SqlCommand命令,並進行預處理 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,併產生一個XmlReader對象作爲結果集返回,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">一個有效的鏈接事務</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定數據庫鏈接字符串的命令,映射數據表並填充數據集. /// </summary> /// <remarks> /// 示例: /// FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}); /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符串</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"); // 建立並打開數據庫鏈接對象,操做完成釋放對象. using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // 調用指定數據庫鏈接字符串重載方法. FillDataset(connection, commandType, commandText, dataSet, tableNames); } } /// <summary> /// 執行指定數據庫鏈接字符串的命令,映射數據表並填充數據集.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">一個有效的數據庫鏈接字符串</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"); // 建立並打開數據庫鏈接對象,操做完成釋放對象. using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // 調用指定數據庫鏈接字符串重載方法. FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters); } } /// <summary> /// 執行指定數據庫鏈接字符串的命令,映射數據表並填充數據集,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">一個有效的數據庫鏈接字符串</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"); // 建立並打開數據庫鏈接對象,操做完成釋放對象. using (SqlConnection connection = new SqlConnection(connectionString)) { connection.Open(); // 調用指定數據庫鏈接字符串重載方法. FillDataset(connection, spName, dataSet, tableNames, parameterValues); } } /// <summary> /// 執行指定數據庫鏈接對象的命令,映射數據表並填充數據集. /// </summary> /// <remarks> /// 示例: /// FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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> /// 執行指定數據庫鏈接對象的命令,映射數據表並填充數據集,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">一個有效的數據庫鏈接對象</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> /// 執行指定數據庫鏈接對象的命令,映射數據表並填充數據集,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">一個有效的數據庫鏈接對象</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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,映射數據表並填充數據集. /// </summary> /// <remarks> /// 示例: /// FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}); /// </remarks> /// <param name="transaction">一個有效的鏈接事務</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,映射數據表並填充數據集,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">一個有效的鏈接事務</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,映射數據表並填充數據集,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">一個有效的鏈接事務</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"); // 若是有參數值 if ((parameterValues != null) && (parameterValues.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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]執行指定數據庫鏈接對象/事務的命令,映射數據表並填充數據集,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">一個有效的數據庫鏈接對象</param> /// <param name="transaction">一個有效的鏈接事務</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"); // 建立SqlCommand命令,並進行預處理 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"); // 建立SqlDataAdapter,當操做完成後釋放. 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); // 提交全部改變到數據集. dataSet.AcceptChanges(); } } #endregion #region CreateCommand 建立一條SqlCommand命令 /// <summary> /// 建立SqlCommand命令,指定數據庫鏈接對象,存儲過程名和參數. /// </summary> /// <remarks> /// 示例: /// SqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName"); /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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"); // 建立命令 SqlCommand cmd = new SqlCommand(spName, connection); cmd.CommandType = CommandType.StoredProcedure; // 若是有參數值 if ((sourceColumns != null) && (sourceColumns.Length > 0)) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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 object AttachParameters(cmd, commandParameters); } return cmd; } #endregion #region ExecuteNonQueryTypedParams 類型化參數(DataRow) /// <summary> /// 執行指定鏈接數據庫鏈接字符串的存儲過程,使用DataRow作爲參數值,返回受影響的行數. /// </summary> /// <param name="connectionString">一個有效的數據庫鏈接字符串</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接對象的存儲過程,使用DataRow作爲參數值,返回受影響的行數. /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫事物的存儲過程,使用DataRow作爲參數值,返回受影響的行數. /// </summary> /// <param name="transaction">一個有效的鏈接事務 object</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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 initialized if (dataRow != null && dataRow.ItemArray.Length > 0) { // 從緩存中加載存儲過程參數,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接字符串的存儲過程,使用DataRow作爲參數值,返回DataSet. /// </summary> /// <param name="connectionString">一個有效的數據庫鏈接字符串</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); //若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接對象的存儲過程,使用DataRow作爲參數值,返回DataSet. /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫事務的存儲過程,使用DataRow作爲參數值,返回DataSet. /// </summary> /// <param name="transaction">一個有效的鏈接事務 object</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接字符串的存儲過程,使用DataRow作爲參數值,返回DataReader. /// </summary> /// <param name="connectionString">一個有效的數據庫鏈接字符串</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接對象的存儲過程,使用DataRow作爲參數值,返回DataReader. /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫事物的存儲過程,使用DataRow作爲參數值,返回DataReader. /// </summary> /// <param name="transaction">一個有效的鏈接事務 object</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接字符串的存儲過程,使用DataRow作爲參數值,返回結果集中的第一行第一列. /// </summary> /// <param name="connectionString">一個有效的數據庫鏈接字符串</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接對象的存儲過程,使用DataRow作爲參數值,返回結果集中的第一行第一列. /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫事務的存儲過程,使用DataRow作爲參數值,返回結果集中的第一行第一列. /// </summary> /// <param name="transaction">一個有效的鏈接事務 object</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫鏈接對象的存儲過程,使用DataRow作爲參數值,返回XmlReader類型的結果集. /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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> /// 執行指定鏈接數據庫事務的存儲過程,使用DataRow作爲參數值,返回XmlReader類型的結果集. /// </summary> /// <param name="transaction">一個有效的鏈接事務 object</param> /// <param name="spName">存儲過程名稱</param> /// <param name="dataRow">使用DataRow做爲參數值</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"); // 若是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,若是緩存中不存在則從數據庫中檢索參數信息並加載到緩存中. () 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,並可以在運行時從存儲過程當中探索參數. /// </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. /// 初始化參數值爲 DBNull.Value. /// </summary> /// <param name="connection">一個有效的數據庫鏈接</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,並填充到cmd的Parameters參數集中. SqlCommandBuilder.DeriveParameters(cmd); connection.Close(); // 若是不包含返回值參數,將參數集中的每個參數刪除. if (!includeReturnValueParameter) { cmd.Parameters.RemoveAt(0); } // 建立參數數組 SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count]; // 將cmd的Parameters參數集複製到discoveredParameters數組. cmd.Parameters.CopyTo(discoveredParameters, 0); // 初始化參數值爲 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>返回一個一樣的參數數組</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">一個有效的數據庫鏈接字符串</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">一個有效的數據庫鏈接字符</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,並將信息存儲到緩存. /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符</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,並將信息存儲到緩存. /// </remarks> /// <param name="connectionString">一個有效的數據庫鏈接字符.</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(使用鏈接對象). /// </summary> /// <remarks> /// 這個方法將查詢數據庫,並將信息存儲到緩存. /// </remarks> /// <param name="connection">一個有效的數據庫鏈接字符</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(使用鏈接對象) /// </summary> /// <remarks> /// 這個方法將查詢數據庫,並將信息存儲到緩存. /// </remarks> /// <param name="connection">一個有效的數據庫鏈接對象</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(使用鏈接對象) /// </summary> /// <param name="connection">一個有效的數據庫鏈接對象</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
1.添加名爲SqlHelper的類，將以上代碼複製進去。
2.添加引用
using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Xml;
3.添加連接字符串
打開App.config增長如下代碼：
<connectionStrings>
< add name = "ConStr" connectionString = "server=.\;database=test;uid=sa;pwd=123456" / >
< / connectionStrings >
4.數據庫鏈接以及增刪改查操做
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Data.SqlClient; namespace SqlhelperTest { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { //鏈接數據庫 SqlConnection con = SqlHelper.GetConnection(); Console.WriteLine("數據庫鏈接成功"); //創建一張表 SqlHelper.ExecuteNonQuery(con, CommandType.Text, "create table student(id int primary key,name varchar(20),age int)"); Console.WriteLine("建表成功"); //插入數據 SqlHelper.ExecuteNonQuery(con, CommandType.Text, "insert into student values(1,'Ghazi',21)"); SqlHelper.ExecuteNonQuery(con, CommandType.Text, "insert into student values(2,'Jack',20)"); Console.WriteLine("數據插入成功"); //查詢 DataSet ds = SqlHelper.ExecuteDataset(con, CommandType.Text, "select* from student"); foreach (DataRow col in ds.Tables[0].Rows) { for (int i = 0; i < 3; i++) { Console.WriteLine(col[i].ToString()); } } //修改 SqlHelper.ExecuteNonQuery(con, CommandType.Text, "update student set age=22 where id=2"); Console.WriteLine("數據修改爲功"); DataSet ds1 = SqlHelper.ExecuteDataset(con, CommandType.Text, "select* from student"); foreach (DataRow col in ds1.Tables[0].Rows) { for (int i = 0; i < 3; i++) { Console.WriteLine(col[i].ToString()); } } //刪除 SqlHelper.ExecuteNonQuery(con, CommandType.Text, "delete from student where id=2"); Console.WriteLine("數據刪除成功"); DataSet ds2 = SqlHelper.ExecuteDataset(con, CommandType.Text, "select* from student"); foreach (DataRow col in ds2.Tables[0].Rows) { for (int i = 0; i < 3; i++) { Console.WriteLine(col[i].ToString()); } } } } }
5.相關知識
DataSet類詳解 https://msdn.microsoft.com/zh-cn/library/system.data.dataset.aspxhtml
http://www.cnblogs.com/losesea/archive/2012/12/08/2809142.html數據庫
經常使用SQL語句 http://www.cnblogs.com/buzaixian/archive/2009/09/21/1571365.html數組
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