public async Task <ActionResult> Edit([Bind(Include = "Masach,Tensach,MaLoaiSach,Mota,Hinhminhhoa,MaCD,MaNXB,Ngaycapnhat")] SACH sACH) { if (ModelState.IsValid) { db.Entry(sACH).State = EntityState.Modified; await db.SaveChangesAsync(); return(RedirectToAction("Index")); } ViewBag.MaCD = new SelectList(db.CHUDEs, "MaCD", "TenCD", sACH.MaCD); ViewBag.MaNXB = new SelectList(db.NXBs, "MaNXB", "TenNXB", sACH.MaNXB); return(View(sACH)); }