WebRequest POST with both file and parameters

Question

I\'m trying to upload a file and a send along a few parameters to my site using .NET / C#. Having read a few tutorials that do either a few parameters or a file, I\'ve tried

Answer 1

I guess the immediate problem is a mismatch between the declared and the actual length.

Where did you miscalculated I am not sure but if I remember correctly the length should include every byte of the response (including headers) except for the first line.

To be sure I would build a simple html page to generate the post you want and examined the post with fiddler (or firebug)