(400) Bad Request error running asp.net site at local host

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Hi
I designed a website for facebook data access. I am getting an error when the page loads while i was accessing it at localhost:4999 port.

C#

public class FacebookLoginHelper
   {
       public Dictionary<string,> GetAccessToken(string code, string scope,string  redirectUrl)
       {
           Dictionary<string,> tokens = new Dictionary<string,>();
           string clientId = FacebookApplication.Current.AppId;
               //FacebookContext.Current.AppId;
           string clientSecret = FacebookApplication.Current.AppSecret;
           string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&client_secret={2}&code={3}&scope={4}",
                           clientId, redirectUrl, clientSecret, code, scope);
           HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
           using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
           {
               StreamReader reader = new StreamReader(response.GetResponseStream());
               string retVal = reader.ReadToEnd();

               foreach (string token in retVal.Split('&'))
               {
                   tokens.Add(token.Substring(0, token.IndexOf("=")),
                       token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf("=") - 1));
               }
           }
           return tokens;
       }
   }

Now it shows error 400 at line :
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)

What is the reason ? Please help me out ?

Thanks

Posted 2-Sep-11 3:53am

LockedOut

Updated 2-Sep-11 5:53am

Orcun Iyigun

v2

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**Orcun Iyigun** · Answer 1 · 2011-09-02T06:00:00

Place the line which you are having an error in a try-catch block and see what is the exception you are getting while debugging it.

C#

WebRequest request = WebRequest.Create("url");         
try         
{             
  using (WebResponse response = request.GetResponse())
  {
    Console.WriteLine("Won't get here");
  }
}
catch (WebException e)
{
  using (WebResponse response = e.Response)
  {
    HttpWebResponse httpResponse = (HttpWebResponse) response;
    Console.WriteLine("Error code: {0}", httpResponse.StatusCode);
    using (Stream data = response.GetResponseStream())
    {
       string text = new StreamReader(data).ReadToEnd();
       Console.WriteLine(text);
    }
  }
}