使用HttpWebRequest抓取网页

HttpWebRequest Wr = (HttpWebRequest)WebRequest.Create(http://www.rzhh.com.cn/default.html);
HttpWebResponse response = (HttpWebResponse)Wr.GetResponse();
Stream receiveStream = response.GetResponseStream();
StreamReader readStream = new StreamReader(receiveStream, Encoding.Default);
Label1.InnerHtml = readStream.ReadToEnd();

response.Close();
readStream.Close();

//然后可以用正则表达式分离需要的内容