c＃WPF视频旋转在图片框内

Question

I hosted a picturebox inside a WPF window inside a stackpanel. I put code to rotate the stackpanel but it doesn't also rotate its child elements, why? I want it to rotate the video stream inside the picturebox during runtime when clicking the rotate button. how do i do it?

private void rotate_Click(object sender, RoutedEventArgs e)
{
    RotateTransform rotateTransform = new RotateTransform(45);
    panel.RenderTransform = rotateTransform;
}

Answer 1

You can't rotate Windows Forms controls so you will need to replace the WindowsFormHost with a WPF control to be able to rotate it:

A WindowsFormsHost cannot be rotated. To suppress this error, handle the LayoutError event and set ThrowException to false

Layout Considerations for the WindowsFormsHost Element: https://msdn.microsoft.com/en-us/library/ms744952%28v=vs.110%29.aspx

Windows Forms controls cannot be rotated or skewed. The WindowsFormsHost element raises the LayoutError event if you apply a skew or rotation transformation. If you do not handle the LayoutError event, an InvalidOperationException is raised.