/// <summary> /// 添加购物车 /// </summary> /// <returns></returns> public async Task <IActionResult> OnPostAsync(int id) { if (!_loginedService.isLogined().Result) { return(RedirectToPage("/SignOn/SignOn")); } else { ViewModel.Book = await _context .Book .FirstOrDefaultAsync(m => m.BookId == id); ViewModel.Similar = await _context .Book .Take(2).ToListAsync(); if (ModelState.IsValid) { if (ViewModel.Book.Quantity < ViewModel.OrderQuantity) { return(Content("<script >alert('剩余库存不足,请调整购物量');</script >", "text/html")); } order = _orderService.GetById(_userService.GetAll().Result.Find(x => x.UserName == _loginedService.GetUserName().Result).UserId).Result.FirstOrDefault(); if (order == null) { order = new Order() { UserId = await _userService.GetId(_loginedService.GetUserName().Result) }; await _orderService.Add(order); } if (_purchaseService.FindByBookid(order.OrderNo, id).Result) { await _purchaseService.AddBook(order.OrderNo, id, ViewModel.OrderQuantity); return(RedirectToPage("/ShoppingCart/ShoppingCart")); } purchase = new Purchase() { BookId = id, OrderNo = order.OrderNo, PurQuan = ViewModel.OrderQuantity, PurPrice = ViewModel.Book.UnitPrice, PurStatus = 0 }; await _purchaseService.Add(order.OrderNo, purchase); return(RedirectToPage("/ShoppingCart/ShoppingCart")); } } //Something went wrong return(Page()); }