public ActionResult exeRegister(Users model)
        {
            using (var db = new WebWorkSystemEntities())
            {
                model.created_at = DateTime.Parse("2018-03-01 00:00:00");
                model.created_by = "管理者";
                model.updated_at = DateTime.Parse("2018-03-01 00:00:00");
                model.updated_by = "管理者";

                db.Users.Add(model);
                db.SaveChanges();
            }
            return(View("Index"));
        }
        public ActionResult exeEdit(Users model)
        {
            using (var db = new WebWorkSystemEntities())
            {
                model.created_at = DateTime.Parse("2018-03-01 00:00:00");
                model.created_by = "管理者";
                model.updated_at = DateTime.Parse("2018-03-01 00:00:00");
                model.updated_by = "管理者";

                db.Entry(model).State = System.Data.Entity.EntityState.Modified;
                db.SaveChanges();
                return(RedirectToAction("Index"));
            }
        }