Question

I’m trying to resize my image after copying it from the screen, and can’t figure out how to do it. The tutorials I’ve been reading recommend using Graphics.DrawImage to resize the image, but when I run this code, it doesn’t resize.

Bitmap b = new Bitmap(control.Width, control.Height);
Graphics g = Graphics.FromImage(b);
g.CopyFromScreen(control.Parent.RectangleToScreen(control.Bounds).X, control.Parent.RectangleToScreen(control.Bounds).Y, 0, 0, new Size(control.Bounds.Width, control.Bounds.Height), CopyPixelOperation.SourceCopy);

g.DrawImage(b, 0,0,newWidth, newHeight);

Any help would be appreciated, thanks!

Answer 1

Try this. Graphics won’t “replace” the image when you use DrawImage – it draws the input image on its source, which is the same as the the image you’re trying to draw to it.

Probably a more concise way to do this but…..

Bitmap b = new Bitmap(control.Width, control.Height);
using (Graphics g = Graphics.FromImage(b)) {
   g.CopyFromScreen(control.Parent.RectangleToScreen(control.Bounds).X, 
      control.Parent.RectangleToScreen(control.Bounds).Y, 0, 0, 
      new Size(control.Bounds.Width, control.Bounds.Height),
      CopyPixelOperation.SourceCopy);
}
Bitmap output = new Bitmap(newWidth, newHeight);
using (Graphics g = Graphics.FromImage(output)) {
  g.DrawImage(b, 0,0,newWidth, newHeight);
}