asp.net mvc中的路由问题3.按类别显示项目,但不显示所有项目

时间:2012-12-28 18:13:30

标签: asp.net asp.net-mvc asp.net-mvc-3 routing

我想按类别显示项目。我使用linq,一切正常,除了我不能显示所有项目,无论类别。可能是路由问题,因为我已经问过我使用的linq表达式的问题,它应该没问题。无论如何,这是我的代码:

public ViewResult Content(string category, int page = 1)
    { 
         var model = new StoreContentViewModel
            {
             Items = _itemsRepository.GetItems()
                             .Where(i => i.Product.Category == null || 
                                    i.Product.Category != null && i.Product.Category == category)
                             .OrderBy(i => i.ItemId)
                             .Skip((page - 1) * PageSize)
                             .Take(PageSize)
                             .Select(i => i),
             }
     }

RegisterRouts方法的内容:

  // without categories
        routes.MapRoute(
            null,
            "Store/Content/Page{page}",
            new { controller = "Store", action = "Content", category = (string)null},
            new { page = @"\d+" });

        // with categories
        routes.MapRoute(
            null,
            "Store/Content/{category}/Page{page}",
            new { controller = "Store", action = "Content" },
            new { page = @"\d+" });

        // Default route
        routes.MapRoute(
            null,
            "{controller}/{action}",
            new { controller = "Home", action = "Index"});

我对“有和无类别”路线的顺序感到困惑。

当我输入网址时:

~/Store/Content

或:

~/Store/Content/Page1      // or Page2

不显示项目。但如果我进入:

~/Store/Content/Man's-Shoes/Page1   

显示与“男士鞋”类别相关联的项目。

那么,这个问题与溃败或mabby有关还有另外一个问题吗?

P.S。我过去2天一直在处理这个问题,所以任何帮助都是合适的。

编辑: 而且这个单元测试失败了。可能写得很糟糕。检查一下。
在我的模型中,我有Items实体“包含”产品和运输实体:

[TestMethod]
    public void Can_Filter_Content()
    {            
        //Arrange
        private Mock<IItemsRepository> _itemsMock = new Mock<IItemsRepository>();
        private Mock<IProductRepository> _productsMock = new Mock<IProductRepository>();
        private Mock<IShippingRepository> _shippingMock = new Mock<IShippingRepository>();

        _itemsMock.Setup(i => i.GetItems()).Returns(new[]
            {
                new Item { ItemId = 1, ProductId = 1, ShippingId = 1},
                new Item { ItemId = 2, ProductId = 2, ShippingId = 2},
                new Item { ItemId = 3, ProductId = 3, ShippingId = 3},
                new Item { ItemId = 4, ProductId = 4, ShippingId = 4}
            });
        _productsMock.Setup(p => p.GetProducts()).Returns(new[]
            {
                new Product { ProductId = 1, Category = "shoes"},
                new Product { ProductId = 2, Category = "shoes"},
                new Product { ProductId = 3, Category = "superShoes"},
                new Product { ProductId = 4, Category = "shoes"}
            });

        var controller = new StoreController(_itemsMock.Object, 
            _productsMock.Object, _shippingMock.Object) {PageSize = 2};

        // Act
        Item[] result = ((StoreContentViewModel) controller.Content(null).Model).Items.ToArray();
        ViewResult viewResult = controller.Content(null);

        // Assert
        Assert.IsTrue(result[0].ItemId == 1 && result[1].ItemId == 2);
        Assert.AreEqual(result.Length, 2);

        Assert.AreEqual("", viewResult.ViewName);
    }

Mabby这有帮助

1 个答案:

答案 0 :(得分:1)

应该这样:

.Where(i => i.Product.Category == null || 
      i.Product.Category != null && i.Product.Category == category)

是这样的:

.Where(i => category == null || 
      i.Product.Category != null && i.Product.Category == category)

当category为null时,原始条件表示产品类别不为null的位置,并且该类别匹配null,这将永远不会起作用。新条件表示如果类别为nu​​ll,则不评估条件;否则,匹配类别(“男士鞋子”)。