网页字段抓取

这是一种方法

  byte[] buf = new byte[38192];
                         HttpWebRequest request = (HttpWebRequest)
                         WebRequest.Create(temp.Url);
                         HttpWebResponse response = (HttpWebResponse)
                         request.GetResponse();
                         Stream resStream = response.GetResponseStream();
                         int count = resStream.Read(buf, 0, buf.Length);
                         string htmltext = Encoding.Default.GetString(buf, 0,
                         count);
                         resStream.Close();
                         bool msg = CheckKeyWord(htmltext, temp.KeyWord);