如何将VisualStyleRenderer保存到文件

Question

I have a VisualStyleRenderer as follows:

VisualStyleRenderer renderer = 
    new VisualStyleRenderer(VisualStyleElement.Button.PushButton.Hot);

How can I save this to an image file (for example, from within the OnPaint() function for a form)?

Answer 1

You don't save it to a file, you use it in your paint event:

  VisualStyleRenderer renderer = new
         VisualStyleRenderer(VisualStyleElement.Button.PushButton.Hot);
  Rectangle r = new Rectangle(16, 16, 120, 28);
  renderer.DrawBackground(e.Graphics, r);

If you are looking to save the result to a file, then create a bitmap and use the Graphics.FromImage(...) function to get a graphic to draw on it, then save that image.

Bitmap bitmap = new Bitmap(120, 28);
using (Graphics g = Graphics.FromImage(bitmap)) {
  VisualStyleRenderer renderer = 
    new VisualStyleRenderer(VisualStyleElement.Button.PushButton.Hot);
  renderer.DrawBackground(g, new Rectangle(0, 0, bitmap.Width, bitmap.Height));
}
bitmap.Save(@"...\button.png", ImageFormat.Png);