How to save a picture in a stream and then write it to a file.

azraelmoon

If a bitmap has been drawn

Stream s = new MemoryStream ();
bitmap.Save (s, ImageFormat.Jpeg);

using (FileStream fs = new FileStream (Server.MapPath ("aaaaaaa.jpg"), FileMode.Create))
{
  byte [] b = new byte [1024];
  int read = 0;
  while ((read = s.Read (b, 0, b.Length))> 0)
  {
    fs.Write (b, 0, read);
  }
}

The file can be generated, but the size is 0 K, there is no image, what's going on?
With bitmap.Save (Response.OutputStream, ImageFormat.Jpeg); you can see the picture.