Tab
A newer version of this page is available. Switch to the current version.

ASPxPageControl.Callback Event

Fires when a round trip to the server has been initiated by a call to the client ASPxClientPageControl.PerformCallback method.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v18.2.dll

Declaration

public event CallbackEventHandlerBase Callback
Public Event Callback As CallbackEventHandlerBase

Event Data

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

Property Description
Parameter Gets a string that contains specific information (if any) passed from the client side.

Remarks

The Callback event allows any desired server-side processing to be performed in response to a call to the client ASPxClientPageControl.PerformCallback method, updating the control's content as required.

Specific information passed from the client side can be obtained via the CallbackEventArgsBase.Parameter property.

NOTE

If an editor's ASPxClientPageControl.PerformCallback method is called on the client, the Callback event will be generated on the server side on each callback request performed by the editor (or on the entire page's postback).

Required actions can be additionally performed on the client side before and after callback processing by using the ASPxClientTabControlBase.BeginCallback and ASPxClientTabControlBase.EndCallback client event.

See Also