public JsonResult AddSubject(Subject rec)
        {
            SubjectServices services = new SubjectServices();

            services.AddSubject(rec);


            return(Json(new { msg = "save" }, JsonRequestBehavior.AllowGet));
        }
        public JsonResult AddSubject(Subject rec)
        {
            SubjectServices services = new SubjectServices();

            services.AddSubject(rec);
            var cl_list = db.Classes.ToList();

            ViewBag.cl = cl_list;


            return(Json(new { msg = "save" }, JsonRequestBehavior.AllowGet));
        }