public async Task <IActionResult> Index()
        {
            var viewModel = new ListBestellingViewModel();

            viewModel.Bestellingen = await _context.Bestellingen.Include(b => b.Klant).ToListAsync();

            return(View(viewModel));
        }
        // GET: Bestelling gefilterd op artikel
        public async Task <IActionResult> Search(ListBestellingViewModel viewModel)
        {
            if (!string.IsNullOrEmpty(viewModel.ArtikelSearch))
            {
                viewModel.Bestellingen = await _context.Bestellingen.Include(b => b.Klant)
                                         .Where(b => b.Artikel.StartsWith(viewModel.ArtikelSearch)).ToListAsync();
            }
            else
            {
                viewModel.Bestellingen = await _context.Bestellingen.Include(b => b.Klant).ToListAsync();
            }

            return(View("Index", viewModel));
        }