获取网页的HTML代码[测试可用]

public static string GetUrlData(string url)
{
HttpWebResponse res = null;
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);

res = (HttpWebResponse)req.GetResponse();
Stream input = null;
input = res.GetResponseStream();
StreamReader sr = new StreamReader(input, Encoding.GetEncoding("gb2312"));
string Content= sr.ReadToEnd();
res.Close();
return Content;
}