Occurs after a callback sent by the current control has been processed on the server, but prior to the time the respective callback result render is formed.
public event EventHandler BeforeGetCallbackResult
Public Event BeforeGetCallbackResult As EventHandler
The BeforeGetCallbackResult event's data class is EventArgs.
This event can be considered as an alternative to a web control's PreRender event, which by design is not invoked during callback processing.