webrequest via a proxy server

Hi ,

  I have the following code to retrieve a given web address. If it is locally and does not have to access the proxy server
  then it works fine but as soon as I need to access a web site that requires the use of the proxy server it does not work.

   You will see in the code snippet that I pass in the required network credentials to access the given proxy server and this just
   returns the error : The remote server returned an error: (407) Proxy Authentication Required.

          private void btnGetWebInfo_Click(object sender, EventArgs e)
        {
            try
            {
                // Create a request for the URL.             
                WebRequest request = WebRequest.Create(txtWebAddress.Text);
                // If required by the server, set the credentials.
                WebProxy loProxy = new WebProxy(txtProxy.Text,true);

                NetworkCredential objCredentials = new NetworkCredential(txtUser.Text, txtPassword.Text, txtDomain.Text);

                request.Credentials = objCredentials;//CredentialCache.DefaultCredentials;
                request.Proxy = loProxy;
     
                // Get the response.
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                // Display the status.
                txtInfo.Text = response.StatusDescription.ToString();
                // Get the stream containing content returned by the server.
                Stream dataStream = response.GetResponseStream();
                // Open the stream using a StreamReader for easy access.
                StreamReader reader = new StreamReader(dataStream);
                // Read the content.
                string responseFromServer = reader.ReadToEnd();
                // Display the content.
                txtInfo.Text = responseFromServer;
                // Cleanup the streams and the response.
                reader.Close();
                dataStream.Close();
                response.Close();



            }
            catch (Exception err)
            {
                txtInfo.Text = "Error : " + err.Message;
            }
        }Start Free Trial