获取服务器信息

例如：获取客户机ＩＰ地址:

public static string GetClientIP()
        {
            HttpRequest request = HttpContext.Current.Request;
            string ipAddress = "";
            if (request.ServerVariables["HTTP_X_FORWARDED_FOR"] == null)
            {
                ipAddress = request.ServerVariables["Remote_Addr"];
            }
            else
            {
                ipAddress = request.ServerVariables["HTTP_X_FORWARDED_FOR"];
            }
            if (ipAddress.IndexOf(",") > 0)
            {
                ipAddress = ipAddress.Substring(0, ipAddress.IndexOf(","));
            }
            return ipAddress;
        }

其中，客户机服务器的有关信息都放在服务器变量中，有关变量参数，请参见 https://msdn.microsoft.com/zh-cn/library/ms524602.aspx