CommandField.ValidateSupportsCallback Method

Definition

Namespace:

System.Web.UI.WebControls

Assembly:

System.Web.dll

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

public:
 override void ValidateSupportsCallback();

public override void ValidateSupportsCallback ();

override this.ValidateSupportsCallback : unit -> unit

Public Overrides Sub ValidateSupportsCallback ()

Exceptions

NotSupportedException

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

Remarks

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.

Note

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.