Dynamics Community Forum Thread Details

I'm trying to call a web service from a D365 CRM Online plugin and I always get "The remote server returned an error: (500) Internal Server Error."

When I don't use SOAPAction as a header, it seems I am getting a kind of response from the server (I think it's the wsdl). But I know I should use the soapaction header.

Below is my code:

string rawXml = ""
                          ""
                              ""
                                  $"{serviceReceiptNo}"
                                  $"{serialNoName}"
                                  $"{itemNoName}"
                                  $"${caseNo}"
                              ""
                          ""
                          "";
                        
                    byte[] requestInFormOfBytes = System.Text.UTF8Encoding.UTF8.GetBytes(rawXml);
                        
                    string url = "http://***/Codeunit/ServiceMgt";
                    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                    
                    request.Headers.Add("SOAPAction", "urn:microsoft-dynamics-schemas/codeunit/ServiceMgt:UpdateTicketNumber");
                    request.Method = "POST";
                    NetworkCredential myNetworkCredential = new NetworkCredential("***@***", "***");
                    request.Credentials = myNetworkCredential;
                    request.ContentType = "text/xml;charset=utf-8";
                    request.ContentLength = requestInFormOfBytes.Length;
                    Stream requestStream = request.GetRequestStream();
                    requestStream.Write(requestInFormOfBytes, 0, requestInFormOfBytes.Length);
                    requestStream.Close();

                    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                    if (response.StatusCode == HttpStatusCode.OK)
                    {

                        Stream responseStream = response.GetResponseStream();
                        string responseStr = new StreamReader(responseStream).ReadToEnd();
                        
                        tracingService.Trace("RESPONSE"   responseStr);
                    }

Any help would be greatly appreciated.