Routing optional parameters in ASP.NET MVC 5

Question

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?

Answer 1

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

http://localhost:52392/2/lib1/ver1/file1/1 http://localhost:52392/2/lib1/ver1/file1 http://localhost:52392/2/lib1/ver1 

or

http://localhost:52392/2/lib1/ver1/file1/1/ http://localhost:52392/2/lib1/ver1/file1/ http://localhost:52392/2/lib1/ver1/ 

and it works fine...