public async Task <IActionResult> Index() { DateTime today = DateTime.Today; DateTime yestarday = new DateTime(today.Year, today.Month, today.Day - 1); DateTime dateMinSale = await _salesRecordService.MinDateSaleAsync(); ViewData["DefaultDataMax"] = today.ToString("yyyy-MM-dd"); ViewData["DefaultDataMin"] = dateMinSale.ToString("yyyy-MM-dd"); SalesFormViewModel viewModel = new SalesFormViewModel() { Departments = await _departmentService.FindAllAsync(), Sellers = await _sellerService.FindAllAsync() }; return(View(viewModel)); }