HttpWebRequest-The remote server returned an error 400 Bad Request

Question

I am getting The remote server returned an error   400  Bad Request error while running the following code  I am trying to upload xml file on the http server  My xml file contains tag for the username password and domain and when i am trying to connect is manually i am able to connect it but using same credentials when i am trying to connect it through this code  i am getting 400 Bad Request error  Please suggest me how to overcome this issue  Thanks        public static void UploadHttp string xml                      string txtResults   string Empty          try                       string url    http   my server com upload aspx                HttpWebRequest request    HttpWebRequest HttpWebRequest Create url               request KeepAlive   false              request SendChunked   true              request AllowAutoRedirect   true              request Method    Post               request ContentType    text xml               var encoder   new UTF8Encoding                var data   encoder GetBytes xml               request ContentLength   data Length              var reqStream   request GetRequestStream                reqStream Write data  0  data Length               reqStream Close                WebResponse response   null              response   request GetResponse                var reader   new StreamReader response GetResponseStream                 var str   reader ReadToEnd                      catch  WebException ex                        if  ex Status    WebExceptionStatus ProtocolError                                HttpWebResponse err   ex Response as HttpWebResponse                  if  err    null                                        string htmlResponse   new StreamReader err GetResponseStream    ReadToEnd                        txtResults   string Format   0   1    err StatusDescription  htmlResponse                                               else                                                catch  Exception ex                        txtResults   ex ToString

User · Answer

400 Bad request Error will be thrown due to incorrect authentication entries.

Check if your API URL is correct or wrong. Don't append or prepend spaces.
Verify that your username and password are valid. Please check any spelling mistake(s) while entering.

Note: Mostly due to Incorrect authentication entries due to spell changes will occur 400 Bad request.

User · Answer

What type of authentication do you use  Send the credentials using the properties Ben said before and setup a cookie handler  You already allow redirection  check your webserver if any redirection occurs  NTLM auth does for sure   If there is a redirection you need to store the session which is mostly stored in a session cookie

User · Answer

Are you sure you should be using POST not PUT   POST is usually used with application x-www-urlencoded formats  If you are using a REST API  you should maybe be using PUT  If you are uploading a file you probably need to use multipart form-data  Not always  but usually  that is the right thing to do    Also you don t seem to be using the credentials to log in - you need to use the Credentials property of the HttpWebRequest object to send the username and password

[c#] HttpWebRequest-The remote server returned an error: (400) Bad Request

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