using System;using System.Web;using System.Xml;using System.Collections;using System.Net;using System.Text;using System.IO;using System.Xml.Serialization; //By huangz 2008-3-19  /// 
///  利用WebRequest/WebResponse进行WebService调用的类 /// 
public class WebSvcCaller{    //
      
           //  
       
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            //  
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           private static Hashtable _xmlNamespaces = new Hashtable();//缓存xmlNamespace，避免重复调用GetNamespace         /// 
    /// 需要WebService支持Post调用    /// 
    public static XmlDocument QueryPostWebService(String URL, String MethodName, Hashtable Pars)    {        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName);        request.Method = "POST";        request.ContentType = "application/x-www-form-urlencoded";        SetWebRequest(request);        byte[] data = EncodePars(Pars);        WriteRequestData(request, data);         return ReadXmlResponse(request.GetResponse());    }        /// 
    /// 需要WebService支持Get调用    /// 
    public static XmlDocument QueryGetWebService(String URL, String MethodName, Hashtable Pars)    {        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(URL + "/" + MethodName + "?" + ParsToString(Pars));        request.Method = "GET";        request.ContentType = "application/x-www-form-urlencoded";        SetWebRequest(request);        return ReadXmlResponse(request.GetResponse());    }          /// 
    /// 通用WebService调用(Soap),参数Pars为String类型的参数名、参数值    /// 
    public static XmlDocument QuerySoapWebService(String URL, String MethodName, Hashtable Pars)    {        if (_xmlNamespaces.ContainsKey(URL))        {            return QuerySoapWebService(URL, MethodName, Pars, _xmlNamespaces[URL].ToString());        }        else        {            return QuerySoapWebService(URL, MethodName, Pars, GetNamespace(URL));        }    }     private static XmlDocument 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);        XmlDocument doc = new XmlDocument(), doc2 = new XmlDocument();        doc = ReadXmlResponse(request.GetResponse());         XmlNamespaceManager mgr = new XmlNamespaceManager(doc.NameTable);        mgr.AddNamespace("soap", "http://schemas.xmlsoap.org/soap/envelope/");        String RetXml = doc.SelectSingleNode("//soap:Body/*/*", mgr).InnerXml;        doc2.LoadXml("
      
       " + RetXml + "
      ");        AddDelaration(doc2);        return doc2;    }    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;    }    private static byte[] EncodeParsToSoap(Hashtable Pars, String XmlNs, String MethodName)    {        XmlDocument doc = new XmlDocument();        doc.LoadXml("
      ");        AddDelaration(doc);        XmlElement soapBody = doc.createElement_x_x("soap", "Body", "http://schemas.xmlsoap.org/soap/envelope/");        XmlElement soapMethod = doc.createElement_x_x(MethodName);        soapMethod.SetAttribute("xmlns", XmlNs);        foreach (string k in Pars.Keys)        {            XmlElement soapPar = doc.createElement_x_x(k);            soapPar.InnerXml = ObjectToSoapXml(Pars[k]);            soapMethod.appendChild_xss(soapPar);        }        soapBody.appendChild_xss(soapMethod);        doc.DocumentElement.appendChild_xss(soapBody);        return Encoding.UTF8.GetBytes(doc.OuterXml);    }    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();        }    }    private static void SetWebRequest(HttpWebRequest request)    {        request.Credentials = CredentialCache.DefaultCredentials;        request.Timeout = 10000;    }     private static void WriteRequestData(HttpWebRequest request, byte[] data)    {        request.ContentLength = data.Length;        Stream writer = request.GetRequestStream();        writer.Write(data, 0, data.Length);        writer.Close();    }     private static byte[] EncodePars(Hashtable Pars)    {        return Encoding.UTF8.GetBytes(ParsToString(Pars));    }     private static String ParsToString(Hashtable Pars)    {        StringBuilder sb = new StringBuilder();        foreach (string k in Pars.Keys)        {            if (sb.Length > 0)            {                sb.Append("&");            }            //sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));        }        return sb.ToString();    }     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;    }     private static void AddDelaration(XmlDocument doc)    {        XmlDeclaration decl = doc.CreateXmlDeclaration("1.0", "utf-8", null);        doc.InsertBefore(decl, doc.DocumentElement);    }}       调用示例： Hashtable ht = new Hashtable();ht.Add("str", "test");ht.Add("b", "true");XmlDocument xx = WebSvcCaller.QuerySoapWebService("http://localhost:81/service.asmx", "HelloWorld", ht);MessageBox.Show(xx.OuterXml);