/// <summary> /// SQLServerHelper的摘要说明。 /// </summary> public class SQLServerHelper { public static string connectionString = ConfigurationManager.ConnectionStrings["SQLConnString"].ConnectionString; #region private utility methods & constructors //Since this class provides only static methods, make the default constructor private to prevent //instances from being created with "new SqlHelper()". private SQLServerHelper() { } /// <summary> /// This method is used to attach array of SqlParameters to a SqlCommand. /// /// This method will assign a value of DbNull to any parameter with a direction of /// InputOutput and a value of null. /// /// This behavior will prevent default values from being used, but /// this will be the less common case than an intended pure output parameter (derived as InputOutput) /// where the user provided no input value. /// </summary> /// <param name="command">The command to which the parameters will be added</param> /// <param name="commandParameters">an array of SqlParameters tho be added to command</param> private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters) { try { foreach (SqlParameter p in commandParameters) { //check for derived output value with no value assigned if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null)) { p.Value = DBNull.Value; } else { if (p.Value == null) { p.Value = DBNull.Value; } } command.Parameters.Add(p); } } catch (Exception ex) { Utils.WriteLogFile(ex.Message.ToString(), "异常日志"); } } /// <summary> /// This method assigns an array of values to an array of SqlParameters. /// </summary> /// <param name="commandParameters">array of SqlParameters to be assigned values</param> /// <param name="parameterValues">array of Components holding the values to be assigned</param> private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues) { try { if ((commandParameters == null) || (parameterValues == null)) { //do nothing if we get no data return; } // we must have the same number of values as we pave parameters to put them in if (commandParameters.Length != parameterValues.Length) { throw new ArgumentException("Parameter count does not match Parameter Value count."); } //iterate through the SqlParameters, assigning the values from the corresponding position in the //value array for (int i = 0, j = commandParameters.Length; i < j; i++) { commandParameters[i].Value = parameterValues[i]; } } catch (Exception ex) { Utils.WriteLogFile(ex.Message.ToString(), "异常日志"); } } /// <summary> /// This method opens (if necessary) and assigns a connection, transaction, command type and parameters /// to the provided command. /// </summary> /// <param name="command">the SqlCommand to be prepared</param> /// <param name="connection">a valid SqlConnection, on which to execute this command</param> /// <param name="transaction">a valid SqlTransaction, or 'null'</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParameters to be associated with the command or 'null' if no parameters are required</param> private static void PrepareCommand(SqlCommand command, SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters) { try { //if the provided connection is not open, we will open it if (connection.State != ConnectionState.Open) { connection.Open(); } //associate the connection with the command command.Connection = connection; //set the command text (stored procedure name or SQL statement) command.CommandText = commandText; //if we were provided a transaction, assign it. if (transaction != null) { command.Transaction = transaction; } //set the command type command.CommandType = commandType; //attach the command parameters if they are provided if (commandParameters != null) { AttachParameters(command, commandParameters); } } catch (Exception ex) { Utils.WriteLogFile(ex.Message.ToString(), "异常日志"); } return; } #endregion private utility methods & constructors #region DataHelpers public static string CheckNull(object obj) { return (string)obj; } public static string CheckNull(DBNull obj) { return null; } #endregion #region AddParameters public static object CheckForNullString(string text) { if (text == null || text.Trim().Length == 0) { return System.DBNull.Value; } else { return text; } } public static SqlParameter MakeInParam(string ParamName, object Value) { return new SqlParameter(ParamName, Value); } /// <summary> /// Make input param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <param name="Value">Param value.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeInParam(string ParamName, SqlDbType DbType, int Size, object Value) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value); } /// <summary> /// Make input param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeOutParam(string ParamName, SqlDbType DbType, int Size) { return MakeParam(ParamName, DbType, Size, ParameterDirection.Output, null); } /// <summary> /// Make stored procedure param. /// </summary> /// <param name="ParamName">Name of param.</param> /// <param name="DbType">Param type.</param> /// <param name="Size">Param size.</param> /// <param name="Direction">Parm direction.</param> /// <param name="Value">Param value.</param> /// <returns>New parameter.</returns> public static SqlParameter MakeParam(string ParamName, SqlDbType DbType, Int32 Size, ParameterDirection Direction, object Value) { SqlParameter param; if (Size > 0) param = new SqlParameter(ParamName, DbType, Size); else param = new SqlParameter(ParamName, DbType); param.Direction = Direction; if (!(Direction == ParameterDirection.Output && Value == null)) param.Value = Value; return param; } #endregion #region ExecuteNonQuery /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(connectionString, commandType, commandText, (SqlParameter[])null); } public static int ExecuteNonQuery(CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(connectionString, commandType, commandText, commandParameters); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteNonQuery(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { SqlTransaction sqltran; sqltran = connection.BeginTransaction(); int retval = -1; try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, sqltran, commandType, commandText, commandParameters); //cmd.CommandTimeout = 5; //finally, execute the command. retval = cmd.ExecuteNonQuery(); sqltran.Commit(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); } catch (Exception ex) { try { sqltran.Rollback(); } catch (Exception e) { } string str = string.Empty; for (int i = 0; i < commandParameters.Length - 1; i++) { str += commandParameters[i].ParameterName + "=" + commandParameters[i].Value.ToString() + ","; } Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString() + "参数值为:" + str, "异常日志"); retval = -1; } finally { connection.Close(); } return retval; } /// <summary> /// Execute a SqlCommand (that returns no resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteNonQuery(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns no resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an int representing the number of rows affected by the command</returns> public static int ExecuteNonQuery(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //cmd.CommandTimeout = 5; //finally, execute the command. int retval = cmd.ExecuteNonQuery(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } catch (Exception ex) { string str = string.Empty; if (commandParameters != null) { for (int i = 0; i < commandParameters.Length - 1; i++) { str += commandParameters[i].ParameterName + "=" + commandParameters[i].Value.ToString() + ","; } } Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString() + "参数值为:" + str, "异常日志"); return -1; } finally { //transaction.Connection.Close(); } } #endregion ExecuteNonQuery #region ExecuteDataSet public static DataSet ExecuteDataset(CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(connectionString, commandType, commandText, commandParameters); } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteDataset(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //create the DataAdapter & DataSet SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc. da.Fill(ds); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); //return the dataset return ds; } catch (Exception ex) { Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } finally { connection.Close(); } return null; } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataset(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a dataset containing the resultset generated by the command</returns> public static DataSet ExecuteDataset(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //create the DataAdapter & DataSet SqlDataAdapter da = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); //fill the DataSet using default values for DataTable names, etc. da.Fill(ds); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); //return the dataset return ds; } catch (Exception ex) { transaction.Connection.Close(); Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } return null; } #endregion ExecuteDataSet #region ExecuteDataTable public static DataTable ExecuteDataTable(CommandType commandType, string commandText) { return ExecuteDataTable(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataTable(connectionString, commandType, commandText, (SqlParameter[])null); } public static DataTable ExecuteDataTable(CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteDataTable(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteDataTable(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataTable(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); cmd.CommandTimeout = 140; PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //create the DataAdapter & DataTable SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); //fill the DataTable using default values for DataTable names, etc. da.Fill(dt); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return dt; } catch (Exception ex) { Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } finally { connection.Close(); } return null; } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteDataTable(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// DataTable dt = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a DataTable containing the resultset generated by the command</returns> public static DataTable ExecuteDataTable(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); cmd.CommandTimeout = 140; PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //create the DataAdapter & DataTable SqlDataAdapter da = new SqlDataAdapter(cmd); DataTable dt = new DataTable(); //fill the DataTable using default values for DataTable names, etc. da.Fill(dt); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); //return the DataTable return dt; } catch (Exception ex) { transaction.Connection.Close(); Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } return null; } #endregion ExecuteDataTable #region ExecuteReader /// <summary> /// this enum is used to indicate whether the connection was provided by the caller, or created by SqlHelper, so that /// we can set the appropriate CommandBehavior when calling ExecuteReader() /// </summary> private enum SqlConnectionOwnership { /// <summary>Connection is owned and managed by SqlHelper</summary> Internal, /// <summary>Connection is owned and managed by the caller</summary> External } /// <summary> /// Create and prepare a SqlCommand, and call ExecuteReader with the appropriate CommandBehavior. /// </summary> /// <remarks> /// If we created and opened the connection, we want the connection to be closed when the DataReader is closed. /// /// If the caller provided the connection, we want to leave it to them to manage. /// </remarks> /// <param name="connection">a valid SqlConnection, on which to execute this command</param> /// <param name="transaction">a valid SqlTransaction, or 'null'</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParameters to be associated with the command or 'null' if no parameters are required</param> /// <param name="connectionOwnership">indicates whether the connection parameter was provided by the caller, or created by SqlHelper</param> /// <returns>SqlDataReader containing the results of the command</returns> private static SqlDataReader ExecuteReader(SqlConnection connection, SqlTransaction transaction, CommandType commandType, string commandText, SqlParameter[] commandParameters, SqlConnectionOwnership connectionOwnership) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters); //create a reader SqlDataReader dr; // call ExecuteReader with the appropriate CommandBehavior if (connectionOwnership == SqlConnectionOwnership.External) { dr = cmd.ExecuteReader(); } else { dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); } // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return dr; } catch (Exception ex) { connection.Close(); Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } return null; } public static SqlDataReader ExecuteReader(CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null); } public static SqlDataReader ExecuteReader(CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connectionString, commandType, commandText, commandParameters); } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connectionString, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection SqlConnection cn = new SqlConnection(connectionString); cn.Open(); try { //call the private overload that takes an internally owned connection in place of the connection string return ExecuteReader(cn, null, commandType, commandText, commandParameters, SqlConnectionOwnership.Internal); } catch { //if we fail to return the SqlDatReader, we need to close the connection ourselves cn.Close(); throw; } } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call to the private overload using a null transaction value and an externally owned connection return ExecuteReader(connection, (SqlTransaction)null, commandType, commandText, commandParameters, SqlConnectionOwnership.External); } /// <summary> /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteReader(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// SqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>a SqlDataReader containing the resultset generated by the command</returns> public static SqlDataReader ExecuteReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through to private overload, indicating that the connection is owned by the caller return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, SqlConnectionOwnership.External); } #endregion ExecuteReader #region ExecuteScalar /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in /// the connection string. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(connectionString, commandType, commandText, (SqlParameter[])null); } public static object ExecuteScalar(CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(connectionString, commandType, commandText, commandParameters); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the database specified in the connection string /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connectionString">a valid connection string for a SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { //create & open a SqlConnection, and dispose of it after we are done. using (SqlConnection cn = new SqlConnection(connectionString)) { cn.Open(); //call the overload that takes a connection in place of the connection string return ExecuteScalar(cn, commandType, commandText, commandParameters); } } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlConnection. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(connection, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlConnection /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="connection">a valid SqlConnection</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters); //execute the command & return the results object retval = cmd.ExecuteScalar(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } catch (Exception ex) { Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } finally { connection.Close(); } return null; } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided SqlTransaction. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount"); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText) { //pass through the call providing null for the set of SqlParameters return ExecuteScalar(transaction, commandType, commandText, (SqlParameter[])null); } /// <summary> /// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlTransaction /// using the provided parameters. /// </summary> /// <remarks> /// e.g.: /// int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new SqlParameter("?prodid", 24)); /// </remarks> /// <param name="transaction">a valid SqlTransaction</param> /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param> /// <param name="commandText">the stored procedure name or T-SQL command</param> /// <param name="commandParameters">an array of SqlParamters used to execute the command</param> /// <returns>an object containing the value in the 1x1 resultset generated by the command</returns> public static object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters) { try { //create a command and prepare it for execution SqlCommand cmd = new SqlCommand(); PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters); //execute the command & return the results object retval = cmd.ExecuteScalar(); // detach the SqlParameters from the command object, so they can be used again. cmd.Parameters.Clear(); return retval; } catch (Exception ex) { transaction.Connection.Close(); Utils.WriteLogFile("执行" + commandText + "时" + ex.Message.ToString(), "异常日志"); } return null; } #endregion ExecuteScalar }