WebClient web = new WebClient();//創建webclient對象
web.Encoding = System.Text.Encoding.UTF8;//定義對象語言
string returns = web.DownloadString("_http://www.weather.com.cn/data/sk/101310101.html");//向一個連接請求資源

WebClient wc = new WebClient();
Byte[] pageData = wc.DownloadData("string rr = Encoding.GetEncoding("utf-8").GetString(pageData);