Getting HTML from a page behind a login

Question

This question is a follow up to my previous question about getting the HTML from an ASPX page. I decided to try using the webclient object, but the problem is that I get the

Answer 1

Just pass valid login parameters to a given URI. Should help you out.

If you don't have login information you shouldn't be trying to circumvent it.

public static string HttpPost( string URI, string Parameters )
      {
         System.Net.WebRequest req = System.Net.WebRequest.Create( URI );
         req.ContentType = "application/x-www-form-urlencoded";
         req.Method = "POST";
         byte[] bytes = System.Text.Encoding.ASCII.GetBytes( Parameters );
         req.ContentLength = bytes.Length;
         System.IO.Stream os = req.GetRequestStream();
         os.Write( bytes, 0, bytes.Length );
         os.Close();
         System.Net.WebResponse resp = req.GetResponse();
         if ( resp == null ) return null;
         System.IO.StreamReader sr = new System.IO.StreamReader( resp.GetResponseStream() );
         return sr.ReadToEnd().Trim();
      }