ASPxClientControlCollection.CallbackError Event
Fires on the client if any server error occurs during server-side processing of a callback sent by any DevExpress web control.
Declaration
CallbackError: ASPxClientEvent<ASPxClientGlobalCallbackErrorEventHandler<ASPxClientControlCollection>>Event Data
The CallbackError event's data class is ASPxClientGlobalCallbackErrorEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| control | Gets an object that initiated a callback. |
| handled | Gets or sets whether the event is handled and the default error handling actions are not required. Inherited from ASPxClientCallbackErrorEventArgs. |
| message | Gets the error message that describes the server error that occurred. Inherited from ASPxClientCallbackErrorEventArgs. |
Remarks
The CallbackError event enables you to centrally respond to server errors that might occur as a result of server-side callback processing initiated by any DevExpress web control. You can handle this event to perform specific client-side actions, such as displaying explanatory text or an image related to the error, for example.
Typically, a server error which occurs during server-side processing of a callback leads to web application hanging, because in this case, no proper response is generated for a control that initiated the callback. However, AJAX-enabled web controls from the DevExpress product line are able to automatically catch server errors occurring in handlers of their server-side events, and to pass the related error information to the client for further processing through the CallbackError event’s argument.
ASPxClientControl.GetControlCollection().CallbackError.AddHandler(function (s, e) {
ErrorLabel.SetText(e.message);
e.handled = true;
});