// To protect from overposting attacks, enable the specific properties you want to bind to, for
        // more details, see https://aka.ms/RazorPagesCRUD.
        public async Task <IActionResult> OnPostAsync(string[] selectedPacks)
        {
            var newOrder = new Order(); if (selectedPacks != null)

            {
                newOrder.CarPacks = new List <CarPack>();
                foreach (var cat in selectedPacks)
                {
                    var catToAdd = new CarPack
                    {
                        PackID = int.Parse(cat)
                    };
                    newOrder.CarPacks.Add(catToAdd);
                }
            }
            if (await TryUpdateModelAsync <Order>(newOrder, "Book", i => i.Buyer, i => i.Brand, i => i.Model, i => i.Color, i => i.Fuel, i => i.Price, i => i.DeliveryDate))
            {
                _context.Order.Add(newOrder);
                await _context.SaveChangesAsync();

                return(RedirectToPage("./Index"));
            }

            PopulateAssignedPackData(_context, newOrder); return(Page());
        }
        public async Task <IActionResult> OnGetAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            CarPack = await _context.CarPack
                      .Include(c => c.Order)
                      .Include(c => c.Pack).FirstOrDefaultAsync(m => m.ID == id);

            if (CarPack == null)
            {
                return(NotFound());
            }
            return(Page());
        }
        public async Task <IActionResult> OnPostAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            CarPack = await _context.CarPack.FindAsync(id);

            if (CarPack != null)
            {
                _context.CarPack.Remove(CarPack);
                await _context.SaveChangesAsync();
            }

            return(RedirectToPage("./Index"));
        }
        public async Task <IActionResult> OnGetAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            CarPack = await _context.CarPack
                      .Include(c => c.Order)
                      .Include(c => c.Pack).FirstOrDefaultAsync(m => m.ID == id);

            if (CarPack == null)
            {
                return(NotFound());
            }
            ViewData["OrderID"] = new SelectList(_context.Order, "ID", "ID");
            ViewData["PackID"]  = new SelectList(_context.Set <Pack>(), "ID", "ID");
            return(Page());
        }