C# Post数据流到HTTP地址

最经典的就是下面这段Post数据流到HTTP地址上，然后获得返回的响应。

             //把sXmlMessage 发送到指定的DsmpUrl地址上
            Encoding encode  =  System.Text.Encoding.GetEncoding( " utf-8 " );
             byte [] arrB  =  encode.GetBytes(sXmlMessage);
            HttpWebRequest myReq  =  (HttpWebRequest)WebRequest.Create(DsmpUrl);
            myReq.Method  =   " POST "  ;
            myReq.ContentType  =   " application/x-www-form-urlencoded " ;
            myReq.ContentLength  =  arrB.Length;
            Stream outStream  =  myReq.GetRequestStream();            
            outStream.Write(arrB, 0 ,arrB.Length);
            outStream.Close();


             // 接收HTTP做出的响应
            WebResponse myResp  =  myReq.GetResponse();
            Stream ReceiveStream  =  myResp.GetResponseStream();                
            StreamReader readStream  =   new  StreamReader( ReceiveStream, encode );
            Char[] read  =   new  Char[ 256 ];
             int  count  =  readStream.Read( read,  0 ,  256  );
             string  str  =   null ;
             while  (count  >   0 ) 
             {
                str += new String(read, 0, count);
                count = readStream.Read(read, 0, 256);
            }  
            readStream.Close();
            myResp.Close();

 看很简单的几句就可以完成HTTP的发送和接收。当然如果你使用soap协议采用Webservice那么原理也相同，只不过是HTTP+XML的方式。
sr:http://www.cnblogs.com/qdwolf/archive/2004/08/13/33119.aspx