/MDXParameter/MDXParameter/SqlHelper.cs
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- // ===============================================================================
- // Microsoft Data Access Application Block for .NET
- // http://msdn.microsoft.com/library/en-us/dnbda/html/daab-rm.asp
- //
- // SQLHelper.cs
- //
- // This file contains the implementations of the SqlHelper and SqlHelperParameterCache
- // classes.
- //
- // For more information see the Data Access Application Block Implementation Overview.
- // ===============================================================================
- // Release history
- // VERSION DESCRIPTION
- // 2.0 Added support for FillDataset, UpdateDataset and "Param" helper methods
- //
- // ===============================================================================
- // Copyright (C) 2000-2001 Microsoft Corporation
- // All rights reserved.
- // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
- // OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
- // LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR
- // FITNESS FOR A PARTICULAR PURPOSE.
- // ==============================================================================
-
- using System;
- using System.Data;
- using System.Xml;
- using System.Data.SqlClient;
- using System.Collections;
-
- namespace Microsoft.ApplicationBlocks.Data
- {
- /// <summary>
- /// The SqlHelper class is intended to encapsulate high performance, scalable best practices for
- /// common uses of SqlClient
- /// </summary>
- internal sealed class SqlHelper
- {
- #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 SqlHelper() { }
-
- /// <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 to be added to command</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)
- {
- // Check for derived output value with no value assigned
- if ((p.Direction == ParameterDirection.InputOutput ||
- p.Direction == ParameterDirection.Input) &&
- (p.Value == null))
- {
- p.Value = DBNull.Value;
- }
- command.Parameters.Add(p);
- }
- }
- }
- }
-
- /// <summary>
- /// This method assigns dataRow column values to an array of SqlParameters
- /// </summary>
- /// <param name="commandParameters">Array of SqlParameters to be assigned values</param>
- /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values</param>
- private static void AssignParameterValues(SqlParameter[] commandParameters, DataRow dataRow)
- {
- if ((commandParameters == null) || (dataRow == null))
- {
- // Do nothing if we get no data
- return;
- }
-
- int i = 0;
- // Set the parameters values
- foreach (SqlParameter commandParameter in commandParameters)
- {
- // Check the parameter name
- if (commandParameter.ParameterName == null ||
- commandParameter.ParameterName.Length <= 1)
- throw new Exception(
- string.Format(
- "Please provide a valid parameter name on the parameter #{0}, the ParameterName property has the following value: '{1}'.",
- i, commandParameter.ParameterName));
- if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)
- commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];
- i++;
- }
- }
-
- /// <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 objects holding the values to be assigned</param>
- private static void AssignParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
- {
- 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++)
- {
- // 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];
- }
- }
- }
-
-
-
-
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-
-
-
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-
-
-
-
-
-
- /// <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 objects holding the values to be assigned</param>
- private static void UpdateParameterValues(SqlParameter[] commandParameters, object[] parameterValues)
- {
- 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++)
- {
- //Update the Return Value
- if (commandParameters[i].Direction == ParameterDirection.ReturnValue)
- {
- parameterValues[i] = commandParameters[i].Value;
- }
-
- if (commandParameters[i].Direction == ParameterDirection.InputOutput)
- parameterValues[i] = commandParameters[i].Value;
- }
- }
-
-
-
-
-
- /// <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>
- /// <param name="mustCloseConnection"><c>true</c> if the connection was opened by the method, otherwose is 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;
- }
-
- // 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)
- {
- if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
- command.Transaction = transaction;
- }
-
- // Set the command type
- command.CommandType = commandType;
-
- // Attach the command parameters if they are provided
- if (commandParameters != null)
- {
- AttachParameters(command, commandParameters);
- }
- return;
- }
-
- #endregion private utility methods & constructors
-
- #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>
- internal 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);
- }
-
- /// <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>
- internal static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
-
- // Create & open a SqlConnection, and dispose of it after we are done
- using (SqlConnection connection = new SqlConnection(connectionString))
- {
- connection.Open();
-
- // Call the overload that takes a connection in place of the connection string
- return ExecuteNonQuery(connection, commandType, commandText, commandParameters);
- }
- }
-
-
-
-
-
-
-
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the database specified in
- /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
- /// </remarks>
- /// <param name="connectionString">A valid connection string for a SqlConnection</param>
- /// <param name="spName">The name of the stored prcedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>An int representing the number of rows affected by the command</returns>
- internal static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
- {
- int intReturn;
- if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
- if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
-
- // If we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName,true);
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- //return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
- intReturn = ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
-
- //Update the array - parameterValues from the new CommandParameters that should have the ReturnValue
- UpdateParameterValues(commandParameters, parameterValues);
- return intReturn;
- }
- else
- {
- // Otherwise we can just call the SP without params
- return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
- }
- }
-
- /// <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>
- internal 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>
- internal static int ExecuteNonQuery(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- if (connection == null) throw new ArgumentNullException("connection");
-
- // Create a command and prepare it for execution
- 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();
-
- // Detach the SqlParameters from the command object, so they can be used again
- cmd.Parameters.Clear();
- if (mustCloseConnection)
- connection.Close();
- return retval;
- }
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the specified SqlConnection
- /// using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
- /// </remarks>
- /// <param name="connection">A valid SqlConnection</param>
- /// <param name="spName">The name of the stored procedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>An int representing the number of rows affected by the command</returns>
- internal 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");
-
- // If we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- else
- {
- // Otherwise we can just call the SP without params
- return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
- }
- }
-
- /// <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>
- internal 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>
- internal 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");
-
- // Create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- bool mustCloseConnection = false;
- PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
-
- // 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;
- }
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns no resultset) against the specified
- /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
- /// </remarks>
- /// <param name="transaction">A valid SqlTransaction</param>
- /// <param name="spName">The name of the stored procedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>An int representing the number of rows affected by the command</returns>
- internal 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");
-
- // If we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- else
- {
- // Otherwise we can just call the SP without params
- return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
- }
- }
-
- #endregion ExecuteNonQuery
-
- #region ExecuteDataset
-
- /// <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>
- internal 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>
- internal static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
-
- // Create & open a SqlConnection, and dispose of it after we are done
- using (SqlConnection connection = new SqlConnection(connectionString))
- {
- connection.Open();
-
- // Call the overload that takes a connection in place of the connection string
- return ExecuteDataset(connection, commandType, commandText, commandParameters);
- }
- }
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the database specified in
- /// the connection string using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
- /// </remarks>
- /// <param name="connectionString">A valid connection string for a SqlConnection</param>
- /// <param name="spName">The name of the stored procedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>A dataset containing the resultset generated by the command</returns>
- internal static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
- {
- DataSet dsReturn;
- if (connectionString == null || connectionString.Length == 0) throw new ArgumentNullException("connectionString");
- if (spName == null || spName.Length == 0) throw new ArgumentNullException("spName");
-
- // If we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- //SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName); -- Original code from sqlHelper
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName,true ); // Added Parameter true to support ReturnValues
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- //return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
- //Modify code - just store the dataset to dsReturn
- dsReturn = ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
-
- //Update the array - parameterValues from the new CommandParameters that should have the ReturnValue
- UpdateParameterValues(commandParameters, parameterValues);
- }
- else
- {
- // Otherwise we can just call the SP without params
- //return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
- //Modify code
- dsReturn = ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
- }
- //Modify code
- return dsReturn;
- }
-
- /// <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>
- internal 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>
- internal static DataSet ExecuteDataset(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- if (connection == null) throw new ArgumentNullException("connection");
-
- // Create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- bool mustCloseConnection = false;
- PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);
-
- // Create the DataAdapter & DataSet
- using (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();
-
- if (mustCloseConnection)
- connection.Close();
-
- // Return the dataset
- return ds;
- }
- }
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified SqlConnection
- /// using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
- /// </remarks>
- /// <param name="connection">A valid SqlConnection</param>
- /// <param name="spName">The name of the stored procedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>A dataset containing the resultset generated by the command</returns>
- internal 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 we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- else
- {
- // Otherwise we can just call the SP without params
- return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
- }
- }
-
- /// <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>
- internal 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>
- internal 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");
-
- // Create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- bool mustCloseConnection = false;
- PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
-
- // Create the DataAdapter & DataSet
- using (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;
- }
- }
-
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns a resultset) against the specified
- /// SqlTransaction using the provided parameter values. This method will query the database to discover the parameters for the
- /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
- /// </summary>
- /// <remarks>
- /// This method provides no access to output parameters or the stored procedure's return value parameter.
- ///
- /// e.g.:
- /// DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
- /// </remarks>
- /// <param name="transaction">A valid SqlTransaction</param>
- /// <param name="spName">The name of the stored procedure</param>
- /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>A dataset containing the resultset generated by the command</returns>
- internal 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 we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);
-
- // Assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
-
- // Call the overload that takes an array of SqlParameters
- return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- else
- {
- // Otherwise we can just call the SP without params
- return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
- }
- }
-
- #endregion ExecuteDataset
-
- #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)
- {
- if (connection == null) throw new ArgumentNullException("connection");
-
- bool mustCloseConnection = false;
- // Create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- try
- {
- PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);
-
- // Create a reader
- SqlDataReader dataReader;
-
- // Call ExecuteReader with the appropriate CommandBehavior
- if (connectionOwnership == SqlConnectionOwnership.External)
- {
- dataReader = cmd.ExecuteReader();
- }
- else
- {
- dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
- }
-
- //We need to Close the DataReader in order to get the Return value
- //if (dataReader.IsClosed == false)
- // dataReader.Close();
-
- // Detach the SqlParameters from the command object, so they can be used again.
- // 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´t set its values.
- // When this happen, the parameters can´t 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>
- /// 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>
- internal 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…
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