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Class IDatabaseHandlerExtensions

Extension methods for IDatabaseHandler adding some often used functionality

Inheritance
System.Object
IDatabaseHandlerExtensions
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: EPiServer.Data
Assembly: EPiServer.Framework.AspNet.dll
Version: 11.20.7
Syntax
public static class IDatabaseHandlerExtensions

Methods

CreateParameter(IDatabaseHandler, String, DbType, ParameterDirection, Object)

Creates a System.Data.Common.DbParameter with the given arguments.

Declaration
public static DbParameter CreateParameter(this IDatabaseHandler handler, string name, DbType type, ParameterDirection direction, object value)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String name

The name of the parameter to create

System.Data.DbType type

The database type of the parameter to create

System.Data.ParameterDirection direction

The direction of the parameter to create

System.Object value

A created parameter

Returns
Type Description
System.Data.Common.DbParameter

CreateParameter(IDatabaseHandler, String, Object)

Creates a System.Data.Common.DbParameter with the specified name and value

Declaration
public static DbParameter CreateParameter(this IDatabaseHandler handler, string name, object value)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String name

Name of the parameter

System.Object value

The value to be added to the parameter (will determine the type)

Returns
Type Description
System.Data.Common.DbParameter

A parameter populated with name and value

CreateReturnParameter(IDatabaseHandler)

Creates a System.Data.Common.DbParameter for a return value of type System.Data.DbType.Int32

Declaration
public static DbParameter CreateReturnParameter(this IDatabaseHandler handler)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

Returns
Type Description
System.Data.Common.DbParameter

An instance of System.Data.Common.DbParameter configured as a return parameter

Remarks

You can use GetReturnValue to retrieve the value of parameters created with this method

ExecuteNonQuery(IDatabaseHandler, String, CommandType, Object[])

Executes a non query using the supplied stored procedure or SQL query and parameter values from the currently opened connection.

Declaration
public static object ExecuteNonQuery(this IDatabaseHandler handler, string commandText, CommandType commandType, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String commandText

The stored procedure name or the SQL query to run.

System.Data.CommandType commandType

How to interprete the data supplied in the commandText parameter.

System.Object[] parameterValues

Any parameter values to add to the stored procedure or SQL query.

Returns
Type Description
System.Object

ExecuteNonQuery(IDatabaseHandler, String, Object[])

Executes a non query using the supplied stored procedure or SQL query and parameter values from the currently opened connection.

Declaration
public static object ExecuteNonQuery(this IDatabaseHandler handler, string storedProcedureName, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String storedProcedureName

The stored procedure name.

System.Object[] parameterValues

Any parameter values to add to the stored procedure.

Returns
Type Description
System.Object

GetParameterValue(IDatabaseHandler, DbCommand, String)

Retrieve a value from a parameter in a System.Data.Common.DbCommand

Declaration
public static object GetParameterValue(this IDatabaseHandler handler, DbCommand cmd, string name)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.Data.Common.DbCommand cmd

The command object from which the value should be retrieved

System.String name

The name of the parameter from which the value should be retrieved

Returns
Type Description
System.Object

The value of the parameter

Exceptions
Type Condition
System.Data.DataException

If the parameter does not exist in the collection

GetReader(IDatabaseHandler, String, CommandType, Object[])

Gets an open System.Data.Common.DbDataReader from the current connection with the given arguments.

Declaration
public static DbDataReader GetReader(this IDatabaseHandler handler, string commandText, CommandType commandType, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String commandText

The stored procedure name or the SQL query to run.

System.Data.CommandType commandType

How to interprete the data supplied in the commandText parameter.

System.Object[] parameterValues

Any parameter values to add to the stored procedure or SQL query.

Returns
Type Description
System.Data.Common.DbDataReader

A database reader the current connection by executing the given stored procedure or SQL query with the supplied parameter values.

GetReader(IDatabaseHandler, String, Object[])

Gets an open System.Data.Common.DbDataReader from the current connection with the given arguments.

Declaration
public static DbDataReader GetReader(this IDatabaseHandler handler, string storedProcedureName, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String storedProcedureName

The stored procedure name.

System.Object[] parameterValues

Any parameter values to add to the stored procedure.

Returns
Type Description
System.Data.Common.DbDataReader

A database reader the current connection by executing the given stored procedure with the supplied parameter values.

GetReturnValue(IDatabaseHandler, DbCommand)

Retrieve the return value created with CreateReturnParameter

Declaration
public static int GetReturnValue(this IDatabaseHandler handler, DbCommand cmd)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.Data.Common.DbCommand cmd

The command object from which the return value should be extracted

Returns
Type Description
System.Int32

The value of the parameter named "ReturnValue"

GetScalar(IDatabaseHandler, String, CommandType, Object[])

Gets a scalar value using the given commant text and parameter values from the currently opened connection.

Declaration
public static object GetScalar(this IDatabaseHandler handler, string commandText, CommandType commandType, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String commandText

The stored procedure name or the SQL query to run.

System.Data.CommandType commandType

How to interprete the data supplied in the commandText parameter.

System.Object[] parameterValues

Any parameter values to add to the stored procedure or SQL query.

Returns
Type Description
System.Object

A scalar value using the current connection by executing the given stored procedure or SQL query with the supplied parameter values.

GetScalar(IDatabaseHandler, String, Object[])

Gets a scalar value using the given commant text and parameter values from the currently opened connection.

Declaration
public static object GetScalar(this IDatabaseHandler handler, string storedProcedureName, params object[] parameterValues)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.String storedProcedureName

The stored procedure name.

System.Object[] parameterValues

Any parameter values to add to the stored procedure.

Returns
Type Description
System.Object

A scalar value using the current connection by executing the given stored procedure with the supplied parameter values.

SetParameterValue(IDatabaseHandler, DbCommand, String, Object)

Set a value to a parameter in a System.Data.Common.DbCommand.

Declaration
public static void SetParameterValue(this IDatabaseHandler handler, DbCommand cmd, string name, object parameterValue)
Parameters
Type Name Description
IDatabaseHandler handler

The handler to execute the method on.

System.Data.Common.DbCommand cmd

The command object on which the value should be set.

System.String name

The name of the parameter on which the value should be set.

System.Object parameterValue

The value of the parameter to be set.

Exceptions
Type Condition
System.Data.DataException

If the parameter does not exist in the collection