Convert System.Windows.Media.ImageSource to System.Drawing.Bitmap

Question

How can I convert a System.Windows.Media.ImageSource to a System.Drawing.Bitmap in C#?

Answer 1

Please see HOW TO USE IMAGESOURCE (NO HANDLER) IN WINFORMS AS SYSTEM.DRAWING.BITMAP (HBITMAP):

How to easily convert WinForms System.Drawing.Bitmap into WPF ImageSource you learned from this article. Today, I'll explain how to do it contrary. Actually, all he have to do is to extract handler from BitmapSource, however, such approach is not supported, thus the only thing we can do is just copy pixels of BitmapSource (or BitmapFrame) into byte array and then copy them into the pointer of HBitmap.

Answer 2

its older OP, but still it can come handy for some other people, as it took some time to find cleaner solution without dll interop or clipboard hacks.

this worked for me, you can use pngencoder to cut the image size before saving to file or rtf stream

private System.Drawing.Image ImageWpfToGDI(System.Windows.Media.ImageSource image) {
  MemoryStream ms = new MemoryStream();
  var encoder = new System.Windows.Media.Imaging.BmpBitmapEncoder();
  encoder.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(image as System.Windows.Media.Imaging.BitmapSource));
  encoder.Save(ms);
  ms.Flush();      
  return System.Drawing.Image.FromStream(ms);
}