学步园

 public static string IPAddress
    {
        get
        {
            string userIP;
            // HttpRequest Request = HttpContext.Current.Request;
            HttpRequest Request = HttpContext.Current.Request; // ForumContext.Current.Context.Request;
            // 如果使用代理，获取真实IP
            if (Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != "")
                userIP = Request.ServerVariables["REMOTE_ADDR"];
            else
                userIP = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            if (userIP == null || userIP == "")
                userIP = Request.UserHostAddress;
            return userIP;
        }
    }