Occurs when a callback for server-side processing is initiated.
The BeginCallback event handler receives an argument of the ASPxClientBeginCallbackEventArgs type. The following properties provide information specific to this event.
|command||Gets a command name that identifies which client action forced a callback to occur.|
The BeginCallback and ASPxClientScheduler.EndCallback events can be used to perform specific client-side actions while a callback is being processed on the server side.