This documentation is archived and is not being maintained.

CommandField::ValidateSupportsCallback Method

Determines whether the controls contained in a CommandField object support callbacks.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public:
virtual void ValidateSupportsCallback() override

ExceptionCondition
NotSupportedException

The Select button is displayed in the CommandField object. The CommandField class does support callbacks when the Select button is displayed.

The ValidateSupportsCallback method is a helper method used to determine whether the controls contained in a CommandField object support callbacks. The CommandField class does not support callbacks when the Select button is displayed. This method has been implemented to throw a NotSupportedException exception when the Select button is displayed.

NoteNote:

This method is used primarily by control developers.

Notes to Inheritors:

Classes that derive from the CommandField class can override this method to indicate whether the controls contained by the field support callbacks. To indicate that callbacks are supported, implement this method as an empty method that does not throw an exception; otherwise, throw an exception with a useful message describing why callbacks are not supported.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
Show: