<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:web="http://WebXml.com.cn/"><soapenv:Header/><soapenv:Body><web:getSupportCity><!--Optional:--><web:byProvinceName>北京</web:byProvinceName></web:getSupportCity></soapenv:Body>
</soapenv:Envelope>

   /// <summary>/// 天气预报/// </summary>/// <param name="id">居民id</param>public static void getPopCheckedInfo(){String ServerUrl = "http://www.webxml.com.cn/WebServices/WeatherWebService.asmx";//得到WebServer地址Hashtable pars = new Hashtable();//用来存放参数pars["byProvinceName"] = "北京";XmlDocument xml = QuerySoapWebService(ServerUrl, "getSupportCity", pars);//这个是对返回的XML文件处理，我删掉了，处理完后返回一个居民的实体对象          }

  public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars){HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);request.Method = "POST";request.Accept = @"gzip,deflate";request.ContentType = @"text/xml;charset=utf-8";request.UserAgent = @"Jakarta Commons-HttpClient/3.1";request.Credentials = CredentialCache.DefaultCredentials;request.Timeout = 10000;byte[] data = EncodeParsToSoap(Pars, MethodName);WriteRequestData(request, data);//将处理成字节组的XML写到流中发送到服务端XmlDocument doc = new XmlDocument();doc = ReadXmlResponse(request.GetResponse());//读取服务端返回的结果return doc;}

 private static Hashtable hshtableXML = new Hashtable();/// <summary>/// 处理要发送的XML文档/// </summary>/// <param name="Pars">参数</param>/// <param name="MethodName">方法名</param>private static byte[] EncodeParsToSoap(Hashtable Pars, String MethodName){XmlDocument xml = null;if (hshtableXML.ContainsKey(MethodName)){//如果已经加载过，则从缓存中读取xml = (XmlDocument)hshtableXML[MethodName];}else{//如果还未加载则进行加载，并放入缓存//从资源文件得到文件流Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream("异步调用.file." + MethodName + ".xml");xml = new XmlDocument();xml.Load(stream);hshtableXML.Add(MethodName, xml);}//修改参数的值foreach (DictionaryEntry de in Pars){XmlNamespaceManager nsmgr = new XmlNamespaceManager(xml.NameTable);nsmgr.AddNamespace("soapenv", "http://schemas.xmlsoap.org/soap/envelope/");nsmgr.AddNamespace("web", "http://WebXml.com.cn/");Hashtable subpars = de.Value as Hashtable;if (subpars == null){string subNode = "soapenv:Envelope/soapenv:Body/web:" + MethodName + "/web:" + de.Key.ToString();XmlNode node = xml.SelectSingleNode(subNode, nsmgr);node.InnerText = de.Value.ToString();}else{foreach (DictionaryEntry subde in subpars){string subNode = "soapenv:Envelope/soapenv:Body/ws:" + MethodName + "/" + de.Key.ToString() + "/" + subde.Key.ToString();XmlNode node = xml.SelectSingleNode(subNode, nsmgr);node.InnerText = subde.Value.ToString();}}}//将修改后的XML文件保存到流中//这样做还可以保证发送的XML文件也是格式化的那种形式，而不是一整行//如通过OuterXml获取的就是一整行，这样也可能会导致服务端解析失败，个人这次就碰到这种情况了MemoryStream outStream = new MemoryStream();xml.Save(outStream);byte[] buffer = new byte[outStream.Length];byte[] temp = outStream.GetBuffer();for (int i = 0; i < buffer.Length; i++){buffer[i] = temp[i];}outStream.Close();return buffer;}

  /// <summary>/// 写到流中，发送给服务端/// </summary>/// <param name="request">HttpWebRequest连接对象</param>/// <param name="data">要写入连接流发给服务端的内容</param>private static void WriteRequestData(HttpWebRequest request, byte[] data){request.ContentLength = data.Length;Stream writer = request.GetRequestStream();writer.Write(data, 0, data.Length);writer.Close();}/// <summary>/// 读取服务端返回的结果/// </summary>private static XmlDocument ReadXmlResponse(WebResponse response){StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);String retXml = sr.ReadToEnd();sr.Close();XmlDocument doc = new XmlDocument();doc.LoadXml(retXml);return doc;}