ASPxClientDocumentViewer.CallbackError Event
Fires on the client if any server error occurs during server-side processing of a callback sent by ASPxClientDocumentViewer.
Namespace: DevExpress.XtraReports.Web.Scripts
Assembly: DevExpress.XtraReports.v18.2.Web.Scripts.dll
Declaration
Event Data
The CallbackError event's data class is DevExpress.Web.Scripts.ASPxClientCallbackErrorEventArgs.
Remarks
The CallbackError event enables you to properly respond to a server error occurring as a result of a callback being processed on the server side. 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 the 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 within 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.
See Handling Callback Exceptions on Client to learn more.