aspnet-devexpress-dot-web-dot-aspxbinaryimage-2944810f.md
Fires when a round trip to the server has been initiated by a call to the client ASPxClientBinaryImage.PerformCallback method.
Namespace : DevExpress.Web
Assembly : DevExpress.Web.v25.2.dll
NuGet Package : DevExpress.Web
public event CallbackEventHandlerBase CustomCallback
Public Event CustomCallback As CallbackEventHandlerBase
The CustomCallback 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. |
The CustomCallback event allows any desired server-side processing to be performed in response to a call to the client ASPxClientBinaryImage.PerformCallback method.
Specific information passed from the client side can be obtained with the CallbackEventArgsBase.Parameter property.
Note that the necessary actions can be additionally performed on the client side before and after callback processing by using the ASPxClientBinaryImage.BeginCallback and ASPxClientBinaryImage.EndCallback client event.
See Also