public async Task <IActionResult> Edit(int id, [Bind("MaLoai,TenLoai,MoTa,Hinh")] Loai loai)
        {
            if (id != loai.MaLoai)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(loai);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!LoaiExists(loai.MaLoai))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(loai));
        }
        public async Task <IActionResult> Edit(int id, [Bind("MaHh,TenHh,MaLoai,MoTaDonVi,DonGia,Hinh,NgaySx,GiamGia,SoLanXem,MoTa,MaNcc")] HangHoa hangHoa, IFormFile fHinh)
        {
            if (id != hangHoa.MaHh)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                if (fHinh != null)
                {
                    hangHoa.Hinh = MyTool.UploadImage(fHinh);
                }

                try
                {
                    _context.Update(hangHoa);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!HangHoaExists(hangHoa.MaHh))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["MaLoai"] = new SelectList(_context.Loai, "MaLoai", "TenLoai", hangHoa.MaLoai);
            ViewData["MaNcc"]  = new SelectList(_context.NhaCungCap, "MaNcc", "MaNcc", hangHoa.MaNcc);
            return(View(hangHoa));
        }