1 　　　　 /// <summary> 
 2         /// 取得客户端真实IP，如果有代理则取第一个非内网地址
 3         /// http://en.wikipedia.org/wiki/X-Forwarded-For
 4         /// </summary> 
 5         public static string GetIPAddress()
 6         {
 7             string proxy_ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];//取得代理
 8             string ip;
 9             if (string.IsNullOrEmpty(proxy_ip))
10             {
11                 ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
12             }
13             else
14             {
15                 string[] ipArray = proxy_ip.Split(',');
16                 ip = ipArray[0];
17             }
18             return ip;
19         }