ASPxClientControlCollection.BeginCallback Event

Occurs when a callback for server-side processing is initiated by any DevExpress control.

Declaration

BeginCallback: ASPxClientEvent<ASPxClientGlobalBeginCallbackEventHandler<ASPxClientControlCollection>>

Event Data

The BeginCallback event's data class is ASPxClientGlobalBeginCallbackEventArgs. The following properties provide information specific to this event:

Property	Description
command	Gets a command name that identifies which client action initiated a callback. Inherited from ASPxClientBeginCallbackEventArgs.
control	Gets an object that initiated a callback.

Remarks

The BeginCallback event, together with the ASPxClientControlCollection.EndCallback event, can be used to perform specific client-side actions (for example, to display and hide an explanatory picture) while a callback is being processed on the server side.

JS

ASPxClientControl.GetControlCollection().BeginCallback.AddHandler(function () {
     LoadingPanel.Show(); 
});