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.v19.2.dll
Declaration
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.