New to programming and need help on invoking a SOAP webservice in C#. Basically I need a way to pass in two parameters (Device ID and User ID) in a click event that transforms into a SOAP message, sends the webrequest, an returns the XML results into a dataset.

I'm not getting a response from my Web Request code below. The code I have is calling the webservice WSDL using Http/Querystring style web request. Is the WebRequest/WebReponse object suitable for invoking SOAP webservices? I don't think my request is recognized by the SOAP WSDL as I'm getting an error message during the response.


Please let me know what modifications I need to make. Any help is appreciated. Thanks. - Henry


            public DataSet GetMeter( string DEVICEID, string UID)

            {

                  //create a web request object

                  WebRequest request = WebRequest.Create(ConfigurationSettings.AppSetting s["METERURL"]); //Add MeterPing URL to web.config

                  request.Method = "POST";

                  request.ContentType = "application/x-www-form-urlencoded";



                  Stream aStream = request.GetRequestStream ();

                  StreamWriter aStreamWriter = new StreamWriter(aStream);

                  StringBuilder aStringBuilder = new StringBuilder();

                  XmlDataDocument myDoc = new XmlDataDocument();



                  aStringBuilder.Append("message=<MeterRequest><serv iceRequestTimeStamp>" + System.DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss") + "</serviceRequestTimeStamp><deviceNumber>" + DEVICEID + "</deviceNumber><deviceType>Generic</deviceType><requestorID>CC" + UID + "</requestorID></MeterRequest>");



                  aStreamWriter.Write(aStringBuilder);



                  //Close the output stream and send the data out to the web server



                  aStreamWriter.Close();



                  //get the response object from the request.



                  WebResponse response = request.GetResponse(); //todo: see if request.timeout default needs to be changed