Question

I have an application that I want to move the window the problem is that all images that had a preview mouse up now are not working.

This is the windo event:

 private void Window_MouseDown(object sender, MouseButtonEventArgs e)
 {
     DragMove();
 }

and this is the image event:

 private void image1_PreviewMouseUp(object sender, MouseButtonEventArgs e)
 {
     MessageBox.Show("WTF IS WPF?");
 }

If I remove the DragMove function the image event works.

Answer 1

why execute DragMove() all the time?

MouseButtonState _mouseButtonState;
private void Window_MouseDown(object sender, MouseButtonEventArgs e)
{
    _mouseButtonState = e.ButtonState;
}

private void Window_MouseMove(object sender, MouseEventArgs e)
{
    if(_mouseButtonState == MouseButtonState.Pressed)
        DragMove();
}

I would also put a check in image1_PreviewMouseUp

private void image1_PreviewMouseUp(object sender, MouseButtonEventArgs e)
{
    if(_dragging) return;

    //else do your preview
}