Routing optional parameters in ASP.NET MVC 5

I am creating an ASP.NET MVC 5 application and I have some issues with routing. We are using the attribute `Route` to map our routes in the web application. I have the following action:

[Route("{type}/{library}/{version}/{file?}/{renew?}")]
public ActionResult Index(EFileType type,
string library,
string version,
string file = null,
ECacheType renew = ECacheType.cache)
{
// code...
}

We only can access this URL if we pass the slash char `/` in the end of `url`, like this:

type/lib/version/file/cache/

It works fine but does not work without `/`, I get a `404` not found error, like this

type/lib/version/file/cache

or this (without optional parameters):

type/lib/version

I would like to access with or without `/` char at the end of `url`. My two last parameters are optional.

My `RouteConfig.cs` is like this:


public class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

routes.MapMvcAttributeRoutes();
}
}

How can I solve it? Make the slash `/` be optional too?

Maybe you should try to have your enums as integers instead?

This is how I did it

public enum ECacheType
{
cache=1, none=2
}

public enum EFileType
{
t1=1, t2=2
}

public class TestController
{
[Route("{type}/{library}/{version}/{file?}/{renew?}")]
public ActionResult Index2(EFileType type,
string library,
string version,
string file = null,
ECacheType renew = ECacheType.cache)
{
return View("Index");
}
}

And my routing file

public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

// To enable route attribute in controllers
routes.MapMvcAttributeRoutes();

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

I can then make calls like

[To see links please register here]

[To see links please register here]

[To see links please register here]

or

[To see links please register here]

[To see links please register here]

[To see links please register here]

and it works fine...

//its working with mvc5
[Route("Projects/{Id}/{Title}")]
public ActionResult Index(long Id, string Title)
{
return view();
}