public async Task <IActionResult> Edit(int id, [Bind("VaiTroId,MoTa")] VaiTro vaiTro)
        {
            if (id != vaiTro.VaiTroId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(vaiTro);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!VaiTroExists(vaiTro.VaiTroId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(vaiTro));
        }
        public async Task <IActionResult> Edit(int id, [Bind("HoaDonId,NgayTao,PhuongThucThanhToan,NgayGiao,SoNha,Quan,PhiShipId,TongTienThanhToan,TinNhan,TrangThai,NhanVienId,KhachHangId")] HoaDon hoaDon)
        {
            if (id != hoaDon.HoaDonId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(hoaDon);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!HoaDonExists(hoaDon.HoaDonId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["KhachHangId"] = new SelectList(_context.KhachHang, "KhachHangId", "KhachHangId", hoaDon.KhachHangId);
            ViewData["NhanVienId"]  = new SelectList(_context.NhanVien, "NhanVienId", "NhanVienId", hoaDon.NhanVienId);
            ViewData["PhiShipId"]   = new SelectList(_context.PhiShip, "PhiShipId", "PhiShipId", hoaDon.PhiShipId);
            return(View(hoaDon));
        }