private string Login(string ip, string mac)
        {
            string methodName = "Login()";

            log.DebugFormat("------------START---{0}-{1}-({2})-----------", className, methodName, "");

            int    res    = 0;// Absen.Login(mac, ip);
            string result = res.ToString();

            result = Retriever.RetrieveLoginData(mac, ip);

            log.DebugFormat("------------END---{0}-{1}-({2})-----------", className, methodName, result);
            return(result);
        }
        private string login(string ip, string mac, string longitude, string latitude)
        {
            string methodName = string.Format("login({0},{1},{2},{3})", mac, ip, longitude, latitude);

            LogHelper.DebugFormat("{0}.{1}:--- start ---", className, methodName);

            double lon = 0.0;
            double lat = 0.0;

            double.TryParse(longitude, out lon);
            double.TryParse(latitude, out lat);
            int    res    = new Absen().Login(mac, ip, lon, lat);
            string result = res.ToString();

            result = Retriever.RetrieveLoginData(mac, ip);

            LogHelper.DebugFormat("{0}.{1}:--- end ---", className, methodName);
            return(result);
        }