Question

I have a System.Drawing.Image in my program. The file is not on the file system it is being held in memory. I need to create a stream from it. How would I go about doing this?

Answer 1

Try the following:

public static Stream ToStream(this Image image, ImageFormat format) {
  var stream = new System.IO.MemoryStream();
  image.Save(stream, format);
  stream.Position = 0;
  return stream;
}

Then you can use the following:

var stream = myImage.ToStream(ImageFormat.Gif);

Replace GIF with whatever format is appropriate for your scenario.