public async Task <IActionResult> Edit(int id, [Bind("GiaId,NgayTao")] GiaTourHienTai giaTourHienTai)
        {
            giaTourHienTai.TourId = id;

            if (id != giaTourHienTai.TourId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    context.Update(giaTourHienTai);
                    await context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!GiaTourHienTaiExists(giaTourHienTai.TourId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            ViewData["GiaId"] = new SelectList(context.TourGia, "GiaId", "GiaTuNgay", giaTourHienTai.GiaId);
            var tour = await context.Tour.FindAsync(giaTourHienTai.TourId);

            ViewData["TourId"] = tour.TourTen;
            return(View(giaTourHienTai));
        }
        public async Task <IActionResult> Create([Bind("TourId,GiaId,NgayTao")] GiaTourHienTai giaTourHienTai)
        {
            if (ModelState.IsValid)
            {
                context.Add(giaTourHienTai);
                await context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            ViewData["GiaId"]  = new SelectList(context.TourGia, "GiaId", "GiaTuNgay", giaTourHienTai.GiaId);
            ViewData["TourId"] = new SelectList(context.Tour, "TourId", "TourTen", giaTourHienTai.TourId);
            return(View(giaTourHienTai));
        }