webservice调用的两种方法

1。第一中不用说了。使用vs.net提供的工具，生成代理类。

2。使用webrequest的方法。

 

public   static  XmlDocument XmlSendByHttp( string  xmlString,  string  url,  string  SoapAction)
        {
            XmlDocument outxml  =   new  XmlDocument();
            Stream oWriter  =   null ;
             bool  bResult  =   true ;
             byte [] data  =  Encoding.UTF8.GetBytes(xmlString);
            HttpWebRequest myRequest  =  (HttpWebRequest)WebRequest.Create(url);

            myRequest.Method  =   " POST " ;
            myRequest.Headers.Add( " SOAPAction " , SoapAction);    
            myRequest.Headers.Add( " ContentLength " , data.Length.ToString());
            myRequest.ContentType  =   " text/xml; charset=utf-8 " ;

             try
            {
                oWriter  =  myRequest.GetRequestStream();
                oWriter.Write(data,  0 , data.Length);
                oWriter.Close();
            }
             catch
            {
                oWriter.Close();
                bResult  =   false ;
            }

            Stream oReader  =   null ;
             if  (bResult)
            {
                 try
                {
                    HttpWebResponse oResponse  =  (HttpWebResponse)myRequest.GetResponse();
                    oReader  =  oResponse.GetResponseStream();
                    outxml.Load(oReader);
                    oReader.Close();
                }
                 catch
                {
                }
            }
             return  outxml;
        }