expressappframework-devexpress-dot-expressapp-dot-systemmodule-dot-dialogcontroller-f885eb15.md
Occurs when executing the current Dialog Controller’s DialogController.CancelAction.
Namespace : DevExpress.ExpressApp.SystemModule
Assembly : DevExpress.ExpressApp.v25.2.dll
NuGet Package : DevExpress.ExpressApp
public event EventHandler Cancelling
Public Event Cancelling As EventHandler
The Cancelling event's data class is EventArgs.
When executing the Action specified by the Dialog Controller’s DialogController.CancelAction property, the current pop-up Window is closed. Handle the Cancelling event to perform custom actions before closing the Window.
If you need to cancel closing the current pop-up Window, set the DialogController.CanCloseWindow property to false. By default, this property is set to true.
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Cancelling event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
dialogCotnroller.Accepting += new EventHandler<DialogControllerAcceptingEventArgs>(dialogCotnroller_Accepting);
dialogCotnroller.Cancelling += dialogCotnroller_Cancelling;
dialogCotnroller.ViewClosed += dialogCotnroller_ViewClosed;
See Also