// GET: BillLines/Create
        public async Task <IActionResult> Create()
        {
            var vm = new WebApp.Areas.Admin.ViewModels.BillLineCreateEditViewModel();

            vm.BillSelectList = new SelectList(
                await _bll.Bills.AllAsync(),
                nameof(BLL.App.DTO.Bill.Id),
                nameof(BLL.App.DTO.Bill.InvoiceNr));

            return(View(vm));
        }
        public async Task <IActionResult> Create(WebApp.Areas.Admin.ViewModels.BillLineCreateEditViewModel vm)
        {
            if (ModelState.IsValid)
            {
                _bll.BillLines.Add(vm.BillLine);
                await _bll.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }

            vm.BillSelectList = new SelectList(
                await _bll.Bills.AllAsync(),
                nameof(BLL.App.DTO.Bill.Id),
                nameof(BLL.App.DTO.Bill.InvoiceNr));


            return(View(vm));
        }
        // GET: BillLines/Edit/5
        public async Task <IActionResult> Edit(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            var billLine = await _bll.BillLines.FindAsync(id.Value);

            if (billLine == null)
            {
                return(NotFound());
            }

            var vm = new WebApp.Areas.Admin.ViewModels.BillLineCreateEditViewModel();

            vm.BillLine       = billLine;
            vm.BillSelectList = new SelectList(
                await _bll.Bills.AllAsync(),
                nameof(BLL.App.DTO.Bill.Id),
                nameof(BLL.App.DTO.Bill.InvoiceNr));

            return(View(vm));
        }