Uri myUri =new Uri("http://211.154.170.249:9002/xxx.aspx?para1=x¶2=y)
WebRequest wrq = WebRequest.Create(myUri);
WebResponse wrs = wrq.GetResponse();
Stream strm = wrs.GetResponseStream();
StreamReader sr = new StreamReader(strm, System.Text.Encoding.GetEncoding( "gb2312" ));
//读取网页
string allHtml = sr.ReadToEnd();