Determines whether the controls contained in a System.Web.UI.WebControls.CommandField object support callbacks.
The CommandField.ValidateSupportsCallback method is a helper method used to determine whether the controls contained in a System.Web.UI.WebControls.CommandField object support callbacks. The System.Web.UI.WebControls.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.
This method is used primarily by control developers.