Silverlight: converting WriteableBitmap to stream

Question

Given a WriteableBitmap, how can I save the bitmap back into an image stream (JPG or BMP)?

My scenario is:

1. Show OpenFileDialog, let user select image
2. Load image into WriteableBitmap
3. Resize image
4. Send image stream to web service

Step #4 is what I'm having trouble with. How can I go from WriteableBitmap -> Stream?

Answer 1

Ok, so Silverlight doesn't have anything built-in to turn a WriteableBitmap into an image stream.

After much wailing and gnashing of teeth, I found the excellent open source ImageTools library for Silverlight, which provides encoders and decoders for JPG, BMP, GIF, and PNG.