ActionLink with Attribute Routing in MVC 5 - vb.net

Question

I'm having trouble with an ActionLink in MVC 5.
#Html.ActionLink("View Commissions", "/" + item.Id.ToString, "Commissions")
#Html.ActionLink("View Commissions", "Index", "Commissions", New With {Key .payRollId = item.Id}, Nothing)
These two ActionLinks should accomplish the same thing, but I would prefer to use the second one. Unfortunately, they produce different URLs. The first creates http://mysite/Commissions/3. The second creates http://mysite/Commissions?payRollId=3.
In my Commissions controller, I have the following code:
' GET: Commissions/5
<Route("Commissions/{payRollId:min(1)}")>
Async Function Index(ByVal payRollId As Integer?) As Task(Of ActionResult)
If IsNothing(payRollId) Then
Return New HttpStatusCodeResult(HttpStatusCode.BadRequest)
End If
Return View(Await ...query...).ToListAsync)
End Function
This successfully handles the first ActionLink's URL. The second one results in a 404 error. I don't have any other RouteAttributes or mapped routes for Commissions. According to this attribute routing article, the second ActionLink should create the pretty URL (no query string) that successfully handles the request.
What am I missing? How can I get the second ActionLink to generate the proper URL (Commissions/3) to match the RouteAttribute?

Answer 1

Edit
This should produced the desired route:
View Commissions
This assumes you've enabled attribute based routing something like this:
public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapMvcAttributeRoutes();
routes.MapRoute(
"Default",
"{controller}/{action}/{id}",
new { controller = "Home", action = "Index", id = UrlParameter.Optional });
}
}

Answer 2

I have a partial solution. I played with the controller code and found that changing the RouteAttribute to <Route("Commissions/{payRollId:min(1)?}")> (note the ? at the end) allows it to handle the second URL.
I am still working on how to generate a pretty URL using the second ActionLink. I will update this answer if I work it out.