c#利用HttpWebRequest获取网页源代码

c#利用HttpWebRequest获取网页源代码，搞了好几天终于解决了，直接获取网站编码进行数据读取，再也不用担心乱码了！

命名空间:Using System.Net

         private static string GetUrlHtml(string url)
         {

             string strHtml = string.Empty;

             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);

             HttpWebResponse response = (HttpWebResponse)request.GetResponse();//从Internet资源返回数据流

             if (response.CharacterSet.ToLower() == "gbk")
             {
                 using (Stream respStream = response.GetResponseStream())//读取数据流
                 {
                     using (StreamReader str = new StreamReader(respStream, Encoding.GetEncoding("gb2312")))//读取数据
                     {
                         strHtml = str.ReadToEnd();
                     }
                 }
             }
             else
             {
                 using (Stream respStream = response.GetResponseStream())//读取数据流
                 {
                     using (StreamReader str = new StreamReader(respStream, Encoding.UTF8))//读取数据
                     {
                         strHtml = str.ReadToEnd();
                     }
                 }
             }
             return strHtml;
         }