How to write client side for soap in c#

Question

I have a project file which I have tested using SOAP UI.

Now I wanted to write it's client side so by viewing this solution I have tried to do things work. But I am having a problem.

In the solution, URL and action are mentioned. I have a URL but I am not sure what is my action URL. So I put both of the same.

var _url = "http://111.111.111.1:111/HES/services/DoCommandRequest";
        var _action = "http://111.111.111.1:111/HES/services/DoCommandRequest";

 XmlDocument soapEnvelopeXml = CreateSoapEnvelope();
        HttpWebRequest webRequest = CreateWebRequest(_url, _action);
        InsertSoapEnvelopeIntoWebRequest(soapEnvelopeXml, webRequest);

        // begin async call to web request.
        IAsyncResult asyncResult = webRequest.BeginGetResponse(null, null);

        // suspend this thread until call is complete. You might want to
        // do something usefull here like update your UI.
        asyncResult.AsyncWaitHandle.WaitOne();

        // get the response from the completed web request.
        string soapResult;
        using (WebResponse webResponse = webRequest.EndGetResponse(asyncResult))
        {
            using (StreamReader rd = new StreamReader(webResponse.GetResponseStream()))
            {
                soapResult = rd.ReadToEnd();
            }
            Console.Write(soapResult);
        }

After running my code I am getting an exception at using (WebResponse webResponse = webRequest.EndGetResponse(asyncResult)) which says

System.Net.WebException {"The remote server returned an error: (500) Internal Server Error."}

I believe that there is some problem with my action, but I am not sure.

Any help would be highly appreciated.

Answer 1

SOAPAction is required in SOAP 1.1 but can be empty (""). See the comment here

First of all you should try to create new SOAP project using your link to wsdl file. After that try to do request from SOAP UI. Try to run "doCommand" action. Look at the result. Than you can compare it with request from your app. You can also use Fiddler to intersept your requests and compare them to find a difference.