无返回值，soap方式调用WebService

using System;
using System.Web;
using System.Xml;
using System.Collections;
using System.Net;
using System.Text;
using System.IO;
using System.Xml.Serialization;

namespace XTask.Common.Net
{
    /// <summary>
    ///  利用WebRequest/WebResponse进行WebService调用的类
    /// </summary>
    public class WebSvcCaller
    {
        //试试配置文件中加以下内容
        //<webServices>
        //  <protocols>
        //    <add name="HttpGet"/>
        //    <add name="HttpPost"/>
        //  </protocols>
        //</webServices>

        private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace

        /// <summary>
        /// 调用webService
        /// </summary>
        /// <param name="URL">格式如：http://localhost/emailws/emailService.asmx/HelloWorld</param>
        public static void QuerySoapWebServiceNoReturn(String URL)
        {
            string MethodName = URL.Substring(URL.LastIndexOf("/")+1);
            string realUrl = URL.Substring(0, URL.LastIndexOf("/"));

            if (_xmlNamespaces.ContainsKey(URL))
            {
                QuerySoapWebService(realUrl, MethodName, null, _xmlNamespaces[realUrl].ToString());
            }
            else
            {
                QuerySoapWebService(realUrl, MethodName, null, GetNamespace(realUrl));
            }
        }

        /// <summary>
        /// 有返回值的方法。
        /// </summary>
        /// <param name="URL"></param>
        /// <param name="MethodName"></param>
        /// <param name="Pars"></param>
        /// <param name="XmlNs"></param>
        /// <returns></returns>
        private static void QuerySoapWebService(String URL, String MethodName, Hashtable Pars, string XmlNs)
        {
            _xmlNamespaces[URL] = XmlNs;//加入缓存，提高效率
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL);
            request.Method = "POST";
            request.ContentType = "text/xml; charset=utf-8";
            request.Headers.Add("SOAPAction", "\"" + XmlNs + (XmlNs.EndsWith("/") ? "" : "/") + MethodName + "\"");
            SetWebRequest(request);
            byte[] data = EncodeParsToSoap(Pars, XmlNs, MethodName);

            WriteRequestData(request, data);
            request.GetResponse();
        }

        /// <summary>
        /// 获取命名空间
        /// </summary>
        /// <param name="URL"></param>
        /// <returns></returns>
        private static string GetNamespace(String URL)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL + "?WSDL");
            SetWebRequest(request);
            WebResponse response = request.GetResponse();
            StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(sr.ReadToEnd());
            sr.Close();
            return doc.SelectSingleNode("//@targetNamespace").Value;
        }

        /// <summary>
        /// 转换成soap包
        /// </summary>
        /// <param name="Pars">参数</param>
        /// <param name="XmlNs">命名空间</param>
        /// <param name="MethodName">方法名</param>
        /// <returns>返回值</returns>
        private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName)
        {
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\"></soap:Envelope>");
            AddDelaration(doc);
            XmlElement soapBody = doc.CreateElement("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
            XmlElement soapMethod = doc.CreateElement(MethodName);
            soapMethod.SetAttribute("xmlns", XmlNs);
            if (Pars != null && Pars.Count > 0)
            {
                foreach (string k in Pars.Keys)
                {
                    XmlElement soapPar = doc.CreateElement(k);
                    soapPar.InnerXml = ObjectToSoapXml(Pars[k]);
                    soapMethod.AppendChild(soapPar);
                }
            }
            soapBody.AppendChild(soapMethod);
            doc.DocumentElement.AppendChild(soapBody);
            return Encoding.UTF8.GetBytes(doc.OuterXml);
        }

        /// <summary>
        /// 转换object成xml
        /// </summary>
        /// <param name="o"></param>
        /// <returns></returns>
        private static string ObjectToSoapXml(object o)
        {
            XmlSerializer mySerializer = new XmlSerializer(o.GetType());
            MemoryStream ms = new MemoryStream();
            mySerializer.Serialize(ms, o);
            XmlDocument doc = new XmlDocument();
            doc.LoadXml(Encoding.UTF8.GetString(ms.ToArray()));
            if (doc.DocumentElement != null)
            {
                return doc.DocumentElement.InnerXml;
            }
            else
            {
                return o.ToString();
            }
        }
       
        /// <summary>
        /// 设置请求参数
        /// </summary>
        /// <param name="request"></param>
        private static void SetWebRequest(HttpWebRequest request)
        {
            request.Credentials = CredentialCache.DefaultCredentials;
            request.Timeout = 10000;
        }

        /// <summary>
        /// 往网络流写数据
        /// </summary>
        /// <param name="request"></param>
        /// <param name="data"></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>
        /// xml添加head
        /// </summary>
        /// <param name="doc"></param>
        private static void AddDelaration(XmlDocument doc)
        {
            XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);
            doc.InsertBefore(decl, doc.DocumentElement);
        }

    }
}