Windows phone screenshot 截图 代码

private void btnCaptureScreen_Click(object sender, RoutedEventArgs e)
{
//Capture the screen and set it to the internal picture box
WriteableBitmap bmp = new WriteableBitmap((int)this.ActualWidth, (int)this.ActualHeight);
bmp.Render(this, null);
bmp.Invalidate();
//this.image1.Source = bmp;

//Set a new background
//ImageBrush brush = new ImageBrush();
//brush.ImageSource = new BitmapImage(new Uri(NextImage,UriKind.Relative));
//ContentGrid.Background = brush;

}