View.QueryCanClose Event

Occurs when checking whether a View can be closed.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v25.1.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public event EventHandler<CancelEventArgs> QueryCanClose

VB.NET

Public Event QueryCanClose As EventHandler(Of CancelEventArgs)

Event Data

The QueryCanClose event's data class is CancelEventArgs. The following properties provide information specific to this event:

Property	Description
Cancel	Gets or sets a value indicating whether the event should be canceled.

Remarks

The QueryCanClose event is raised from View.CanClose and View.Close methods. To keep the View open, handle the event and set the CancelEventArgs.Cancel parameter to true.

Note

The QueryCanClose event is raised for root views only.
XAF does not trigger the QueryCanClose event in ASP.NET Core Blazor applications. Use the DevExpress.ExpressApp.Blazor.BlazorWindow.Closing event to prohibit closing a View under certain conditions.