MvcBookStore/Controllers/ShoppingCartController.cs

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using MvcBookStore.Models;
using MvcBookStore.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcBookStore.Controllers
{
    public class ShoppingCartController : Controller
    {
        //
        // GET: /ShoppingCart/

        IShoppingCart _shoppingCart;//定义购物车接口对象
        IBookRepository _bookRepository;//定义书籍接口对象


        //在构造函数中实现上述对象的初始化
        public ShoppingCartController()
        {
            _shoppingCart = new ShoppingCart();
            _bookRepository = new BookRepository();

        }

        //GET: /ShoppingCart/显示当前购物车项目
        public ActionResult Index()
        {
            _shoppingCart.GetCartId(this.HttpContext);
            //初始化购物车视图模型（ShoppingCartViewModel)
            //_shoppingCart.ShoppingCartId =cardId;
            var viewModel = new ShoppingCartViewModel
            {
                CartItems = _shoppingCart.GetCartItems(),
                CartTotal = _shoppingCart.GetTotal()
            };
            //返回视图模型
            return View(viewModel);
        }

        public ActionResult AddToCart(int id)
        {
            _shoppingCart.GetCartId(this.HttpContext);
            //确定传递进来的BookId是否有效
            Books book = _bookRepository.GetBooksById(id);
            if (book != null)
            { 
                //将书籍加入购物车
                _shoppingCart.AddToCart(id);
            }
            //返回购物车页面
            return RedirectToAction("Index");
        }
        [HttpPost]
        public ActionResult RemoveFromCart(int id)
        {
            _shoppingCart.GetCartId(this.HttpContext);
            Books book = _shoppingCart.GetBookByRecordId(id);//获取购物车中记录对应的图书