aspnet-devexpress-dot-web-dot-aspxpagecontrol-7597fd3d.md
Fires when you call the PerformCallback(parameter) method and initiate a round trip to the server.
Namespace : DevExpress.Web
Assembly : DevExpress.Web.v25.2.dll
NuGet Package : DevExpress.Web
public event CallbackEventHandlerBase Callback
Public Event Callback As CallbackEventHandlerBase
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. |
Call the PerformCallback(parameter) method to send a callback to the server. You can pass information from the client to the server as the method’s parameter. On the server, the PerformCallback method raises the Callback event and passes the specified parameter to the event argument’s Parameter property.
You can use the PerformCallback method to update only the active tab content. Changes to the contents of all inactive tabs are ignored.
The ASPxPageControl raises the BeginCallback and EndCallback events before and after each callback.
For move information about callbacks in DevExpress controls, see the following section: Callbacks
See Also