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

 1         private static string GetUrlHtml(string url)
 2         {
 3 
 4             string strHtml = string.Empty;
 5 
 6             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
 7 
 8             HttpWebResponse response = (HttpWebResponse)request.GetResponse();//从Internet资源返回数据流
 9 
10             if (response.CharacterSet.ToLower() == "gbk")
11             {
12                 using (Stream respStream = response.GetResponseStream())//读取数据流
13                 {
14                     using (StreamReader str = new StreamReader(respStream, Encoding.GetEncoding("gb2312")))//读取数据
15                     {
16                         strHtml = str.ReadToEnd();
17                     }
18                 }
19             }
20             else
21             {
22                 using (Stream respStream = response.GetResponseStream())//读取数据流
23                 {
24                     using (StreamReader str = new StreamReader(respStream, Encoding.UTF8))//读取数据
25                     {
26                         strHtml = str.ReadToEnd();
27                     }
28                 }
29             }
30             return strHtml;
31         }