public ActionResult AddNew(string ap_dept, string ap_patient, string date)
        {
            DateTime           da = DateTime.Parse(date);
            AppointmentService pa = new AppointmentService();
            var res = pa.AddNew(ap_dept, ap_patient, da);

            //return RedirectToAction(nameof(Index));
            return(Json(res, JsonRequestBehavior.AllowGet));
        }