public ActionResult Create([Bind(Include = "Name,Password,Gender,Major,EntranceDate")] Student student)
        {
            if (ModelState.IsValid)
            {
                if (db.GetItemByName(student.Name) == null)
                {
                    db.Careate(student);
                    return RedirectToAction("Index");
                }
            }

            return View(student);
        }