winform获取网页代码的两种方式：

1.使用WebClient类获取：

WebClient wc1 = new WebClient();
wc1.Encoding = Encoding.UTF8;
 string weatherData1 = wc2.DownloadString(http://www.weather.com.cn/data/sk/101280601.html);

2.使用网页流：

            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://www.weather.com.cn/data/sk/101280601.html");
            request.Timeout = 5000;
            request.Method = "GET";
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            StreamReader sr = new StreamReader(response.GetResponseStream());
            string jsonstr = sr.ReadLine();