Skip to main content
All docs
V25.1
  • DevExpress v25.1 Update — Your Feedback Matters

    Our What's New in v25.1 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

    Take the survey Not interested

    WindowClosingEventArgs Class

    Contains data for the Closing event.

    Namespace: DevExpress.Blazor

    Assembly: DevExpress.Blazor.v25.1.dll

    NuGet Package: DevExpress.Blazor

    #Declaration

    C#
    public class WindowClosingEventArgs :
        CancelEventArgs

    #Remarks

    The Closing event is raised before the Window is closed. Use the event argument’s CloseReason property to identify which action closes the Window. You can set the Cancel property to true to cancel a close action.

    Close Reason Description
    CloseButtonClick A user clicks a custom Close button (if you called the predefined CloseCallback to create this button).
    EscapePress A user presses Escape.
    Programmatically You set the Visible property to false or call the CloseAsync method.

    You can also handle the Closed event that fires after the Window is closed.

    In the following example, neither the Close button in the header nor the custom OK button closes the Window until a user enables the checkbox in the footer:

    Razor
    <DxButton Id="showDDbtton" Click="() => IsOpen = true">SHOW A WINDOW</DxButton>
    <DxWindow Width="400"
                @bind-IsOpen="@IsOpen"
                ShowFooter="true"
                HeaderText="DevExpress EULA"
                Closing="EulaClosing"
                Closed="EulaClosed">
        <BodyTextTemplate>
            <p>
                The terms of our license are fully outlined/described in the Developer Express Inc End User
                License Agreement (EULA) included with our product installations. Before you can install and use
                a Developer Express Inc product, you must read, understand and accept the terms/conditions of
                our EULAs. <a target="" _blank"" rel="" noopener noreferrer"" href="" https: //www.devexpress.com/support/eulas/"">More info...</a>
            </p>
        </BodyTextTemplate>
        <FooterTextTemplate>
            <DxCheckBox style="margin-left: 0; margin-right: auto;" @bind-Checked="@EulaAccepted">
                I accept the terms of the EULA
            </DxCheckBox>
            <DxButton RenderStyle="ButtonRenderStyle.Primary" Text="OK" Click="context.CloseCallback" />
        </FooterTextTemplate>
    </DxWindow>
    
    @code {
        bool IsOpen { get; set; } = false;
        bool EulaAccepted { get; set; }
    
        void EulaClosing(WindowClosingEventArgs args) {
            if (args.CloseReason == WindowCloseReason.Programmatically) {
                args.Cancel = !EulaAccepted;
            }
        }
        void EulaClosed(WindowClosedEventArgs args) {
            EulaAccepted = false;
        }
    }
    

    #Inheritance

    Object
    EventArgs
    CancelEventArgs
    WindowClosingEventArgs
    See Also