本文主要參考例如以下两个链接。并整理：

Java使用SOAP: http://www.cnblogs.com/linjiqin/archive/2012/05/07/2488880.html

C# send soap and get response: http://stackoverflow.com/questions/4791794/client-to-send-soap-request-and-received-response

1.webservice提供方：http://www.webxml.com.cn/zh_cn/index.aspx

2.以下我们以“获得腾讯QQ在线状态”为例。网页介绍參考：http://www.webxml.com.cn/webservices/qqOnlineWebService.asmx?

op=qqCheckOnline

代码例如以下：

using System.IO;

using System.Xml;

using System.Net;

namespace ConsoleApplicationTest2

{

    class SOAPTest

    {

        public static void CallWebService(string qq)

        {

            var _url = "http://www.webxml.com.cn/webservices/qqOnlineWebService.asmx";

            var _action = "http://WebXml.com.cn/qqCheckOnline";

            XmlDocument soapEnvelopeXml = CreateSoapEnvelope(qq);

            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.WriteLine(soapResult);

            }

        }

        private static HttpWebRequest CreateWebRequest(string url, string action)

        {

            HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);

            webRequest.Headers.Add("SOAPAction", action);

            webRequest.ContentType = "text/xml;charset=\"utf-8\"";

            webRequest.Accept = "text/xml";

            webRequest.Method = "POST";

            return webRequest;

        }

        private static XmlDocument CreateSoapEnvelope(string qq)

        {

            XmlDocument soapEnvelop = new XmlDocument();

            string soapXml = @"<SOAP-ENV:Envelope xmlns:SOAP-ENV=""http://schemas.xmlsoap.org/soap/envelope/"" xmlns:xsi=""http://www.w3.org/1999/XMLSchema-instance"" xmlns:xsd=""http://www.w3.org/1999/XMLSchema""><SOAP-ENV:Body><qqCheckOnline xmlns=""http://WebXml.com.cn/""><qqCode>qq_Code</qqCode></qqCheckOnline></SOAP-ENV:Body></SOAP-ENV:Envelope>";

            soapEnvelop.LoadXml(soapXml.Replace("qq_Code",qq));

            return soapEnvelop;

        }

        private static void InsertSoapEnvelopeIntoWebRequest(XmlDocument soapEnvelopeXml, HttpWebRequest webRequest)

        {

            using (Stream stream = webRequest.GetRequestStream())

            {

                soapEnvelopeXml.Save(stream);

            }

        }

        static void test()

        {

            string[] qq = { "49", "4941", "4949252", "494925223", "4949252242", "48492522502", "49492522" };

            foreach (var qc in qq)

                SOAPTest.CallWebService(qc);

            Console.ReadKey();

        }

    }

}

例如以下图即能够得到执行结果：