// GET: ADMIN/Sach/Create
        public ActionResult Create()
        {
            var dao1 = new TacGiaFunction().TGs.Where(p => p.Tentacgia != null);

            ViewBag.TacgiaID = new SelectList(dao1, "TacgiaID", "tentacgia", null);
            var dao2 = new TheLoaiFunction().TLs.Where(p => p.Tentheloai != null);

            ViewBag.TheloaiID = new SelectList(dao2, "TheloaiID", "tentheloai", null);
            var dao3 = new NhaXuatBanFunction().NXBs.Where(p => p.TenNXB != null);

            ViewBag.NhaxuatbanID = new SelectList(dao3, "NhaxuatbanID", "tennxb", null);
            return(View());
        }
        // GET: ADMIN/Sach/Edit/5
        public ActionResult Edit(int id)
        {
            var dao1 = new TacGiaFunction().TGs.Where(p => p.Tentacgia != null);

            ViewBag.TacgiaID = new SelectList(dao1, "TacgiaID", "tentacgia", null);
            var dao2 = new TheLoaiFunction().TLs.Where(p => p.Tentheloai != null);

            ViewBag.TheloaiID = new SelectList(dao2, "TheloaiID", "tentheloai", null);
            var dao3 = new NhaXuatBanFunction().NXBs.Where(p => p.TenNXB != null);

            ViewBag.NhaxuatbanID = new SelectList(dao3, "NhaxuatbanID", "tennxb", null);
            var model = new SachFunction().FindEntity(id);

            return(View(model));
        }