public async Task <IActionResult> Create([Bind("VaiTroId,MoTa")] VaiTro vaiTro)
        {
            if (ModelState.IsValid)
            {
                _context.Add(vaiTro);
                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            return(View(vaiTro));
        }
        public async Task <IActionResult> Create([Bind("HoaDonId,NgayTao,PhuongThucThanhToan,NgayGiao,SoNha,Quan,PhiShipId,TongTienThanhToan,TinNhan,TrangThai,NhanVienId,KhachHangId")] HoaDon hoaDon)
        {
            if (ModelState.IsValid)
            {
                _context.Add(hoaDon);
                await _context.SaveChangesAsync();

                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));
        }