Changes the image source cyclically in WPF

Question

I want to change the image source cyclically in my program, it's the C# code:

private void Img_MouseLeave(object sender, MouseEventArgs e)
{
    Image image = sender as Image;
    int milliseconds = 500;
    for(int i = 0; i < ImageUris.Count(); i++)
    {
       Thread.Sleep(milliseconds);
       image.Source = new BitmapImage(new Uri(@ImageUris[i], UriKind.Absolute));
    }
}

But the problem is when I run my program the window is freezed. There is no happen in the window. I think maybe it's affected by thread, but I can't find a way do it.

Jehof · Accepted Answer · 2013-10-29 08:43:22Z

3

The call Thread.Sleep will freeze the MainThread that is running your application.

Use a DispatcherTimer to avoid freezing your application.

DispatcherTimer dispatcherTimer = new DispatcherTimer();
dispatcherTimer.Tick += dispatcherTimer_Tick;
dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 500);

private void dispatcherTimer_Tick(object sender, EventArgs e) {
   // assign new source to the Image
}

answered Oct 29, 2013 at 8:43

Jehof

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