SqlHelper.cs
2018-06-18 01:10:36来源:未知 阅读 ()
- using System;
- using System.Data;
- using System.Xml;
- using System.Data.SqlClient;
- using System.Collections;
- using System.Configuration;
- using FPAD.ADModel;
- namespace FPAD.DBUtility
- {
- /// <summary>
- /// The SqlHelper class is intended to encapsulate high performance, scalable best practices for
- /// common uses of SqlClient.
- /// </summary>
- public 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 tho be added to command</param>
- private static void AttachParameters(SqlCommand command, SqlParameter[] commandParameters)
- {
- 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;
- }
- command.Parameters.Add(p);
- }
- }
- /// <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++)
- {
- commandParameters[i].Value = parameterValues[i];
- }
- }
- /// <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)
- {
- //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);
- }
- return;
- }
- #endregion private utility methods & constructors
- #region GetConnSt & GetConnection
- /// <summary>
- /// 获取登录账套数据库连接字符串
- /// </summary>
- /// <param name="ZTNF">要连接的账套年份,为空时表示当前账套</param>
- /// <returns></returns>
- public static string GetConnStr(string ZTNF = "")
- {
- string DataSource = System.Configuration.ConfigurationManager.AppSettings["DataSource"].ToString();
- string UserName = System.Configuration.ConfigurationManager.AppSettings["DataUser"].ToString();
- string Pwd = System.Configuration.ConfigurationManager.AppSettings["DataPwd"].ToString();
- string DataBase;
- if (ZTNF != "")
- DataBase = "AdManage_" + ZTNF;
- else
- DataBase = "AdManage_" + LoginUserInfo.ZTNF;
- string sqlconnstr = "server=" + DataSource + ";database=" + DataBase + ";Uid=" + UserName + ";Pwd=" + Pwd + ";Timeout=36000;";
- return sqlconnstr;
- }
- /// <summary>
- /// 获取基础库连接字符串
- /// </summary>
- /// <returns></returns>
- public static string GetConnStr_Pub()
- {
- string DataSource = System.Configuration.ConfigurationManager.AppSettings["DataSource"].ToString();
- string UserName = System.Configuration.ConfigurationManager.AppSettings["DataUser"].ToString();
- string Pwd = System.Configuration.ConfigurationManager.AppSettings["DataPwd"].ToString();
- string DataBase = "AdManage_Pub";
- string sqlconnstr = "server=" + DataSource + ";database=" + DataBase + ";Uid=" + UserName + ";Pwd=" + Pwd + ";Timeout=36000;";
- return sqlconnstr;
- }
- /// <summary>
- /// 获取当前登录账套数据库连接
- /// </summary>
- /// <param name="ZTNF">要连接的账套年份,为空时表示当前账套</param>
- /// <returns></returns>
- public static SqlConnection GetConnection(string ZTNF = "")
- {
- string sqlconnstr = GetConnStr(ZTNF);
- SqlConnection cn = new SqlConnection(sqlconnstr);
- return cn;
- }
- /// <summary>
- /// 获取基础数据库连接
- /// </summary>
- /// <returns></returns>
- public static SqlConnection GetConnection_Pub()
- {
- string sqlconnstr = GetConnStr_Pub();
- SqlConnection cn = new SqlConnection(sqlconnstr);
- return cn;
- }
- #endregion GetConnSt & GetConnection
- #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);
- }
- /// <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 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>
- public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
- {
- //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);
- //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);
- }
- //otherwise we can just call the SP without params
- else
- {
- 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>
- 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)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
- //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 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>
- public static int ExecuteNonQuery(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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);
- }
- //otherwise we can just call the SP without params
- else
- {
- 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>
- 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)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
- //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>
- public static int ExecuteNonQuery(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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);
- }
- //otherwise we can just call the SP without params
- else
- {
- 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>
- 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 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>
- public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
- {
- //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);
- //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);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
- }
- }
- /// <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)
- {
- //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;
- }
- /// <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>
- public static DataSet ExecuteDataset(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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);
- }
- //otherwise we can just call the SP without params
- else
- {
- 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>
- 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)
- {
- //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;
- }
- /// <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>
- public static DataSet ExecuteDataset(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
- }
- }
- #endregion ExecuteDataSet
- #region ExecuteDataTable
- /// <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);
- }
- /// <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 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.:
- /// DataTable dt = ExecuteDataTable(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 DataTable containing the resultset generated by the command</returns>
- public static DataTable ExecuteDataTable(string connectionString, string spName, params object[] parameterValues)
- {
- //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);
- //assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
- //call the overload that takes an array of SqlParameters
- return ExecuteDataTable(connectionString, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteDataTable(connectionString, CommandType.StoredProcedure, spName);
- }
- }
- /// <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)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- 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 the DataTable
- return dt;
- }
- /// <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.:
- /// DataTable dt = ExecuteDataTable(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 DataTable containing the resultset generated by the command</returns>
- public static DataTable ExecuteDataTable(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteDataTable(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteDataTable(connection, CommandType.StoredProcedure, spName);
- }
- }
- /// <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)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- 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;
- }
- /// <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.:
- /// DataTable dt = ExecuteDataTable(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 DataTable containing the resultset generated by the command</returns>
- public static DataTable ExecuteDataTable(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteDataTable(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteDataTable(transaction, CommandType.StoredProcedure, spName);
- }
- }
- #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)
- {
- //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;
- }
- /// <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 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.:
- /// SqlDataReader dr = ExecuteReader(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 SqlDataReader containing the resultset generated by the command</returns>
- public static SqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
- {
- //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);
- //assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
- //call the overload that takes an array of SqlParameters
- return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
- }
- }
- /// <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 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.:
- /// SqlDataReader dr = ExecuteReader(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 SqlDataReader containing the resultset generated by the command</returns>
- public static SqlDataReader ExecuteReader(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //if we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName);
- AssignParameterValues(commandParameters, parameterValues);
- return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteReader(connection, CommandType.StoredProcedure, spName);
- }
- }
- /// <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);
- }
- /// <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.:
- /// SqlDataReader dr = ExecuteReader(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 SqlDataReader containing the resultset generated by the command</returns>
- public static SqlDataReader ExecuteReader(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //if we receive parameter values, we need to figure out where they go
- if ((parameterValues != null) && (parameterValues.Length > 0))
- {
- SqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName);
- AssignParameterValues(commandParameters, parameterValues);
- return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
- }
- }
- #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);
- }
- /// <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 stored procedure via a SqlCommand (that returns a 1x1 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 orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 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>an object containing the value in the 1x1 resultset generated by the command</returns>
- public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
- {
- //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);
- //assign the provided values to these parameters based on parameter order
- AssignParameterValues(commandParameters, parameterValues);
- //call the overload that takes an array of SqlParameters
- return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
- }
- }
- /// <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)
- {
- //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;
- }
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns a 1x1 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 orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 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 object containing the value in the 1x1 resultset generated by the command</returns>
- public static object ExecuteScalar(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
- }
- }
- /// <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)
- {
- //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;
- }
- /// <summary>
- /// Execute a stored procedure via a SqlCommand (that returns a 1x1 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 orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 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 object containing the value in the 1x1 resultset generated by the command</returns>
- public static object ExecuteScalar(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
- }
- }
- #endregion ExecuteScalar
- #region ExecuteXmlReader
- /// <summary>
- /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlConnection.
- /// </summary>
- /// <remarks>
- /// e.g.:
- /// XmlReader r = ExecuteXmlReader(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 using "FOR XML AUTO"</param>
- /// <returns>an XmlReader containing the resultset generated by the command</returns>
- public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText)
- {
- //pass through the call providing null for the set of SqlParameters
- return ExecuteXmlReader(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.:
- /// XmlReader r = ExecuteXmlReader(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 using "FOR XML AUTO"</param>
- /// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
- /// <returns>an XmlReader containing the resultset generated by the command</returns>
- public static XmlReader ExecuteXmlReader(SqlConnection connection, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- PrepareCommand(cmd, connection, (SqlTransaction)null, commandType, commandText, commandParameters);
- //create the DataAdapter & DataSet
- XmlReader retval = cmd.ExecuteXmlReader();
- // 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 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.:
- /// XmlReader r = ExecuteXmlReader(conn, "GetOrders", 24, 36);
- /// </remarks>
- /// <param name="connection">a valid SqlConnection</param>
- /// <param name="spName">the name of the stored procedure using "FOR XML AUTO"</param>
- /// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
- /// <returns>an XmlReader containing the resultset generated by the command</returns>
- public static XmlReader ExecuteXmlReader(SqlConnection connection, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteXmlReader(connection, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteXmlReader(connection, CommandType.StoredProcedure, spName);
- }
- }
- /// <summary>
- /// Execute a SqlCommand (that returns a resultset and takes no parameters) against the provided SqlTransaction.
- /// </summary>
- /// <remarks>
- /// e.g.:
- /// XmlReader r = ExecuteXmlReader(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 using "FOR XML AUTO"</param>
- /// <returns>an XmlReader containing the resultset generated by the command</returns>
- public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText)
- {
- //pass through the call providing null for the set of SqlParameters
- return ExecuteXmlReader(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.:
- /// XmlReader r = ExecuteXmlReader(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 using "FOR XML AUTO"</param>
- /// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
- /// <returns>an XmlReader containing the resultset generated by the command</returns>
- public static XmlReader ExecuteXmlReader(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
- {
- //create a command and prepare it for execution
- SqlCommand cmd = new SqlCommand();
- PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
- //create the DataAdapter & DataSet
- XmlReader retval = cmd.ExecuteXmlReader();
- // 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 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.:
- /// XmlReader r = ExecuteXmlReader(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>
- public static XmlReader ExecuteXmlReader(SqlTransaction transaction, string spName, params object[] parameterValues)
- {
- //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.ConnectionString, 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 ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
- }
- //otherwise we can just call the SP without params
- else
- {
- return ExecuteXmlReader(transaction, CommandType.StoredProcedure, spName);
- }
- }
- #endregion ExecuteXmlReader
- }
- /// <summary>
- /// SqlHelperParameterCache provides functions to leverage a static cache of procedure parameters, and the
- /// ability to discover parameters for stored procedures at run-time.
- /// </summary>
- public sealed class SqlHelperParameterCache
- {
- #region private methods, variables, and constructors
- //Since this class provides only static methods, make the default constructor private to prevent
- //instances from being created with "new SqlHelperParameterCache()".
- private SqlHelperParameterCache() { }
- private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());
- /// <summary>
- /// resolve at run time the appropriate set of SqlParameters for a stored procedure
- /// </summary>
- /// <param name="connectionString">a valid connection string for a SqlConnection</param>
- /// <param name="spName">the name of the stored procedure</param>
- /// <param name="includeReturnValueParameter">whether or not to include their return value parameter</param>
- /// <returns></returns>
- private static SqlParameter[] DiscoverSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
- {
- using (SqlConnection cn = new SqlConnection(connectionString))
- using (SqlCommand cmd = new SqlCommand(spName, cn))
- {
- cn.Open();
- cmd.CommandType = CommandType.StoredProcedure;
- SqlCommandBuilder.DeriveParameters(cmd);
- if (!includeReturnValueParameter)
- {
- cmd.Parameters.RemoveAt(0);
- }
- SqlParameter[] discoveredParameters = new SqlParameter[cmd.Parameters.Count]; ;
- cmd.Parameters.CopyTo(discoveredParameters, 0);
- return discoveredParameters;
- }
- }
- //deep copy of cached SqlParameter array
- 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 private methods, variables, and constructors
- #region caching functions
- /// <summary>
- /// add parameter array to the cache
- /// </summary>
- /// <param name="connectionString">a valid connection string for a SqlConnection</param>
- /// <param name="commandText">the stored procedure name or T-SQL command</param>
- /// <param name="commandParameters">an array of SqlParamters to be cached</param>
- public static void CacheParameterSet(string connectionString, string commandText, params SqlParameter[] commandParameters)
- {
- string hashKey = connectionString + ":" + commandText;
- paramCache[hashKey] = commandParameters;
- }
- /// <summary>
- /// retrieve a parameter array from the cache
- /// </summary>
- /// <param name="connectionString">a valid connection string for a SqlConnection</param>
- /// <param name="commandText">the stored procedure name or T-SQL command</param>
- /// <returns>an array of SqlParamters</returns>
- public static SqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
- {
- string hashKey = connectionString + ":" + commandText;
- SqlParameter[] cachedParameters = (SqlParameter[])paramCache[hashKey];
- if (cachedParameters == null)
- {
- return null;
- }
- else
- {
- return CloneParameters(cachedParameters);
- }
- }
- #endregion caching functions
- #region Parameter Discovery Functions
- /// <summary>
- /// Retrieves the set of SqlParameters appropriate for the stored procedure
- /// </summary>
- /// <remarks>
- /// This method will query the database for this information, and then store it in a cache for future requests.
- /// </remarks>
- /// <param name="connectionString">a valid connection string for a SqlConnection</param>
- /// <param name="spName">the name of the stored procedure</param>
- /// <returns>an array of SqlParameters</returns>
- public static SqlParameter[] GetSpParameterSet(string connectionString, string spName)
- {
- return GetSpParameterSet(connectionString, spName, false);
- }
- /// <summary>
- /// Retrieves the set of SqlParameters appropriate for the stored procedure
- /// </summary>
- /// <remarks>
- /// This method will query the database for this information, and then store it in a cache for future requests.
- /// </remarks>
- /// <param name="connectionString">a valid connection string for a SqlConnection</param>
- /// <param name="spName">the name of the stored procedure</param>
- /// <param name="includeReturnValueParameter">a bool value indicating whether the return value parameter should be included in the results</param>
- /// <returns>an array of SqlParameters</returns>
- public static SqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
- {
- string hashKey = connectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");
- SqlParameter[] cachedParameters;
- cachedParameters = (SqlParameter[])paramCache[hashKey];
- if (cachedParameters == null)
- {
- cachedParameters = (SqlParameter[])(paramCache[hashKey] = DiscoverSpParameterSet(connectionString, spName, includeReturnValueParameter));
- }
- return CloneParameters(cachedParameters);
- }
- #endregion Parameter Discovery Functions
- }
- }
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