Home > DeveloperSection > Forums > How to fading out a wpf window during close
Andrew Deniel
Andrew Deniel

Total Post:29

Points:203
Posted on    July-18-2013 3:09 AM

 WPF WPF 
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Hi mindstick!

I want to fade a window in/out in my application. Fading in occurs on Window.Loaded and I wanted to fade out on close (Window.Closed or Window.Closing). Fading in works perfectly but a RoutedEvent is not allowed on Window.Closing. What RoutedEvent should I be using for Close?

    <Window.Triggers>

        <EventTrigger RoutedEvent="Window.Loaded">

            <BeginStoryboard>

                <Storyboard>

                    <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" To="1" Duration="0:0:2" FillBehavior="HoldEnd" />

                </Storyboard>

            </BeginStoryboard>

        </EventTrigger>

        <EventTrigger RoutedEvent="Window.Closing">

            <BeginStoryboard>

                <Storyboard>

                    <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0" Duration="0:0:2" FillBehavior="HoldEnd" />

                </Storyboard>

            </BeginStoryboard>

        </EventTrigger>

    </Window.Triggers>

I get a error on , Value 'Window.Closing' cannot be assigned to property 'RoutedEvent'. Invalid event name.

thanks in advance



shreesh chandra shukla
shreesh chandra shukla

Total Post:105

Points:735
Posted on    July-18-2013 11:20 PM

Solution!

Closing is not a routed event, so you can't use it in an EventTrigger. Perhaps you could start the storyboard in the handler of the ClosingEvent in the code-behind and cancel the event... something like that :

private bool closeStoryBoardCompleted = false;

private void Window_Closing(object sender, CancelEventArgs e)

{

    if (!closeStoryBoardCompleted)

    {

        closeStoryBoard.Begin();

        e.Cancel = true;

    }

}

private void closeStoryBoard_Completed(object sender, EventArgs e)

{

    closeStoryBoardCompleted = true;

    this.Close();

}


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