ASP.NET Web 窗体路由二义性

我有以下顺序的路由规则:

routes.MapPageRoute("Corporate", "Shop/{Category}", "~/Shop.aspx");
routes.MapPageRoute("GiftType", "Shop/{Category}", "~/Shop.aspx");
routes.MapPageRoute("Occasion", "Shop/{Category}", "~/Shop.aspx");
routes.MapPageRoute("Discounted", "Shop/{Category}", "~/Shop.aspx");
routes.MapPageRoute("Featured", "Shop/{Featured}", "~/Shop.aspx");

我正在使用的链接:

<a href="~/Shop/Corporate" title="Corporate Gifts" runat="server">Corporate</a>
<a href="~/Shop/GiftType" title="Shop by Gift Type" runat="server">Gift Type</a>
<a href="~/Shop/Occasion" title="Shop by Occasion" runat="server">Occasion</a>
<a href="~/Shop/Discounted" title="Discounted" runat="server">Discounted</a>
<a href='<%# "~/Shop/"+Eval("Featured") %>' title='<%# Eval("ProductName") %>'
    runat="server">

在目标页面的代码隐藏中，以下代码有效，我不知道为什么。 switch 语句正在为“Featured”的“True”值执行？就像我没有根据占位符来区分这些路线？

if (Page.RouteData.Values["Category"] != null)
{
    string category = Page.RouteData.Values["Category"].ToString();

    switch (category)
    {
        case ("Corporate"):
            Response.Write("Corporate");
            break;
        case ("GiftType"):
            Response.Write("GiftType");
            break;
        case ("Occasion"):
            Response.Write("Occasion");
            break;
        case ("Discounted"):
            Response.Write("Discounted");
            break;
        // Do not want the following to be picked up here for Category param
        case ("True"):
            Response.Write("Featured");
            break;
    }
}

我想在代码方面工作是这样的:

    if (Page.RouteData.Values["Category"] != null)
    {
        string category = Page.RouteData.Values["Category"].ToString();

        switch (category)
        {
            case ("Corporate"):
                Response.Write("Corporate");
                break;
            case ("GiftType"):
                Response.Write("GiftType");
                break;
            case ("Occasion"):
                Response.Write("Occasion");
                break;
            case ("Discounted"):
                Response.Write("Discounted");
                break;
        }
    }
    else if (Page.RouteData.Values["Featured"].ToString() == "True")
    {
        Response.Write("Featured");
    }

最佳答案

您的类别只需要一条路线:

routes.MapPageRoute("shop-categories", "Shop/{Category}", "~/Shop.aspx");

然后你可以像以前一样构建 URL，或者像

<a id="a1" href="<%$ RouteUrl:Category=Discounted,routename=shop-categories%>" title="Discounted" runat="server">Discounted</a>

我认为你会想要一条不同的路线(为了清楚起见)作为特色，比如

routes.MapPageRoute("featured", "Shop/Featured/{Featured}", "~/Shop.aspx");

和链接(双向):

<a id="A2" href="<%$ RouteUrl:Featured=False,routename=featured%>" title="Featured" runat="server">Featured False</a>
<a id="A3" href="~/Shop/Featured/True" title="Featured" runat="server">Featured True</a>

然后你的代码隐藏:

if (Page.RouteData.Values["Category"] != null)
{
    //something
}
else if (Page.RouteData.Values["Featured"] != null)
{
    //something
}

像我展示的那样构建链接的好处是，如果您决定更改路线……您不会破坏任何东西。假设您最终不喜欢 URL /Shop/Featured/ 的外观，只是希望它是 /Featured/ ，因此您更改了路线:

routes.MapPageRoute("featured", "Featured/{Featured}", "~/Shop.aspx");

现在在我上面的示例中，与 id="A2" 的链接仍然有效，而 id="A3" 现在已损坏。

关于ASP.NET Web 窗体路由二义性，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19071320/