Using HttpWebRequest to POST data/upload image using multipart/form-data

Question

I am trying to use the ImageShack API to upload images. To use it, I am supposed to POST the image using multipart/form-data. I did it like ...

Answer 1

This is nothing like multipart/form-data

1. There's no boundaries between fields (needed even with one field).
2. Why are you base-64 encoding?
3. There's no indication of the content-type of the image.

Take a look at RFC 2388 for the actual format spec. It can also be useful to look at a Fiddler grab of a file upload from a web-page.