I'm currently writing a bit of code to send some xml data to a web service via HTTP POST. I thought this would be really simple and have written the following example code (C#)

Console.WriteLine("Press enter to send data...");

        while (Console.ReadLine() != "q")
        {
            HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create(@"http://localhost:8888/");

            Foo fooItem = new Foo
                {
                    Member1 = "05",
                    Member2 = "74455604",
                    Member3 = "15101051",
                    Member4 = 1,
                    Member5 = "fsf",
                    Member6 = 6.52,
                };


            ASCIIEncoding encoding = new ASCIIEncoding();
            string postData = fooItem.ToXml();
            byte[] data = encoding.GetBytes(postData);

            httpWReq.Method = "POST";
            httpWReq.ContentType = "application/xml";
            httpWReq.ContentLength = data.Length;

            using (Stream stream = httpWReq.GetRequestStream())
            {
                stream.Write(data, 0, data.Length);
            }

            HttpWebResponse response = (HttpWebResponse)httpWReq.GetResponse();

            string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
            Console.WriteLine("Received " + responseString);

            Console.WriteLine("Press enter to send data...");
        }

This is all I thought would be necessary, however I have now been given the details for the web service. This included some information which is unfarmiliar to me and I'm unsure whether I need to include it.

The information I was sent was

        <url>http://sometext/soap/rpc</url>
        <namespace>http://sometext/a.services</namespace>
        <method>receiveInfo</method>
        <parm-id>xmldata</parm-id> (Input data) (Actual XML data as string)
        <parm-id>status</parm-id> (Output data) 
        <userid>user</userid>
        <password>pass</password>
        <secure>false</secure>

I guess this means I need to include a username and password somehow, but I'm not sure what the namespace or method fields are used for.

Could anyone give me a hint? Sorry I've never used webservices before.