MVC attribute routing issues

Question

I decorate an action (in my Home controller) like so:

[Route("view-book")] public ActionResult ViewBook(int? id1, string id2)

In my View, I populate some hyperlinks using javascript:

tbody = tbody + '<a href="@Url.Action("ViewBook", "Home")/' + item.Id + '/' + item.Slug + '">View Book</a>';

With the above code, the URL of the hyperlink renders correctly. E.g:

https://localhost:44306/view-book/1/this-book

However, the ActionResult doesn't get hit. So, I change the routing decoration to be:

[Route("view-book/{id1:int?}/{id2}")] public ActionResult ViewBook(int? id1, string id2)

And now the URL renders incorrectly like so:

https://localhost:44306/Home/ViewBook/1/this-prop

However, if I manually change the URL to the correct URL like above:

https://localhost:44306/view-book/1/this-prop

The ActionResult then gets hit!

How do I resolve this?

Nkosi · Accepted Answer · 2017-04-23 15:59:35Z

You can use multiple routes on the action.

[HttpGet] [Route("view-book")] // Matches GET view-book [Route("view-book/{id1:int?}/{id2}")] //Matches GET view-book/1/slug public ActionResult ViewBook(int? id1, string id2) { ... }

That way, when you build the route in javascript, the first route should now allow you to render the correct URL before because @Url.Action("ViewBook", "Home") should resolve to view-book as desired, and the second route will allow the action to be invoked.

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