从 .net 3.5 升级到 4.0 后，MVC Html.ActionLink 不起作用

发布于 2024-10-07 21:06:19 字数 308 浏览 1 评论 0原文

正如标题所说，我有一个带有一堆 Html.ActionLink 的项目

<%= Html.ActionLink("Reason for booking", "BookingReason")%>

，我已将项目升级到 .net 4.0，并且它们不再呈现指向操作的链接。当然，它只是一个空白，导致页面重新加载。

Html.ActionLink 标记位于区域共享文件夹中的用户控件 (ascx) 中。

我尝试再次降级到 .net 3.5 并且它有效 - 奇怪。有什么想法吗？

谢谢

原文

Well as the title says, I have a project with a bunch of Html.ActionLink

<%= Html.ActionLink("Reason for booking", "BookingReason")%>

I have upgraded the project to .net 4.0 and they no longer render a link to the action. Its just a blank of course causing the page to reload.

The Html.ActionLink tags are in a user control (ascx) in the Shared folder of an Area.

I tried downgrading again to .net 3.5 and it works - weird. any ideas?

Thx

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苯莒 2024-10-14 21:06:19

请务必使用 UrlParameter.Optional 标记您的可选参数，

            routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );

这就是我们的问题（症状与您一样）。

——编辑
这不是唯一的问题。
当迁移到 MVC 3 时，你可能会遇到下一个问题，
假设您有这样的路线（id 和 page 是可选的），

            routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}/{page}", // URL with parameters
            new { controller = "Home", action = "Index", id = "", page = "" } // Parameter defaults
        );

现在您必须将其拆分为 2 个不同的路线：

        routes.MapRoute(
            "Paged",                                                     // Route name
            "{controller}/{action}/{id}/{page}", 
            new { controller = "Home", action = "Index", page = UrlParameter.Optional } // Parameter defaults
        );

        routes.MapRoute(
            "Default",                                                     // Route name
            "{controller}/{action}/{id}", 
            new { controller = "Home", action = "Index", id = UrlParameter.Optional}//, page = UrlParameter.Optional }  // Parameter defaults
        );

Be sure to mark your optional params with UrlParameter.Optional

            routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );

That was the problem for us (symptoms as yours).

-- Edited
It wasn't the only problem.
When migrating to MVC 3 you can get next problem,
suppose you had such route(id and page were optional)

            routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}/{page}", // URL with parameters
            new { controller = "Home", action = "Index", id = "", page = "" } // Parameter defaults
        );

now you have to split it to 2 different routes:

        routes.MapRoute(
            "Paged",                                                     // Route name
            "{controller}/{action}/{id}/{page}", 
            new { controller = "Home", action = "Index", page = UrlParameter.Optional } // Parameter defaults
        );

        routes.MapRoute(
            "Default",                                                     // Route name
            "{controller}/{action}/{id}", 
            new { controller = "Home", action = "Index", id = UrlParameter.Optional}//, page = UrlParameter.Optional }  // Parameter defaults
        );

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柠檬色的秋千 2024-10-14 21:06:19

排序了。

我需要在自定义路由之上有一条默认路由......必须在某个时候将其删除。

仍然很奇怪它在 .net 3.5 而不是 4 中的工作原理。

context.MapRoute(
            "Name",
            "AreaName/{action}",
            new { controller = "defaultController", action = "defaultAction" }
        );

Sorted it.

I needed to have a default route above my custom ones...must have removed it at some point.

Still weird how it works in .net 3.5 and not 4.

context.MapRoute(
            "Name",
            "AreaName/{action}",
            new { controller = "defaultController", action = "defaultAction" }
        );

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