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?

Yes! 404 error, if I add a breakpoint, it just does not hit on the breakpoint! — Felipe Oriani, Jul 10 '14 at 14:02
Starting from Visual Studio, it's running on the IIS Express! — Felipe Oriani, Jul 10 '14 at 14:03
If `{file}` is not provided, but `{renew}` is, how is it supposed to know which one you provided since they are both optional? — user1477388, Jul 10 '14 at 14:22
All optional parameters are processed in order so `{file}` always has to be given if `{renew}` is there. I tried you code above and it worked just fine for me. I tried both with tailing `/` and without...had the same result. I tried both with and without the optional parameters...same successful result. How have you defined your enums? Are they defined with set integer values? — Ohlin, Jul 10 '14 at 15:39
@Ohlin, my enum I pass as string, with the same name of each item. How is your `RouteConfig.cs`? — Felipe Oriani, Jul 10 '14 at 17:24

score 53 · Accepted Answer · answered Jul 11 '14 at 07:10

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...

score -8 · Answer 2 · edited Jul 04 '17 at 11:04

-8

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

edited Jul 04 '17 at 11:04

Komal12

3,340
4
16
25

answered Jul 04 '17 at 08:09

Ambala Chandrashekar

512
5
6

Routing optional parameters in ASP.NET MVC 5

2 Answers2

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