HTTP POST - I'm stuck

Question

I have to POST some parameters to a URL outside my network, and the developers on the other side asked me to not use HTTP Parameters: instead I have to post my key-values in HTTP Headers.

The fact is that I don't really understand what they mean: I tried to use a ajax-like post, with XmlHttp objects, and also I tried to write in the header with something like

Request.Headers.Add(key,value);

but I cannot (exception from the framework); I tried the other way around, using the Response object like

Response.AppendHeader("key", "value");

and then redirect to the page... but this doesn't work, as well.

It's evident, I think, that I'm stuck there, any help?

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EDIT I forgot to tell you that my environment is .Net 2.0, c#, on Win server 2003. The exception I got is

System.PlatformNotSupportedException was unhandled by user code
  Message="Operation is not supported on this platform."
  Source="System.Web"

This looks like it's caused by my tentative to Request.Add, MS an year ago published some security fixes that don't permit this.

Answer 1

Have you tried the WebClient class? An example might look like:

        WebClient client = new WebClient();
        NameValueCollection data = new NameValueCollection();
        data["var1"] = "var1";
        client.UploadValues("http://somewhere.com/api", "POST", data);

Answer 2

Like @lassevk said, a redirect won't work.

You should use the WebRequest class to do an HTTP POST from your page or application. There's an example here.