C# MVC Routes with same action name and different parameters

Question

I have two methods in the SurveyController:

public ActionResult Index(string surveyId, string surveyWaveId, string programId)

and

public ActionResult Index(string hash)

I would like to be able to go to:

Survey/Index/{string} or Survey/Index/{string}/{string}/{string}

and route to the correct action based on the number of parameters supplied. Is this possible with MVC5? I also have this in my RouteConfig.

routes.MapRoute(
            name: "SurveyEmailLink",
            url: "Survey/Index/{hash}",
            defaults: new { controller = "Survey", action = "Index"},
            namespaces: new[] { "Cobalt.Controllers" }
            );

        routes.MapRoute(
            name: "SurveyIconLink",
            url: "Survey/Index/{surveyId}/{surveyWaveId}/{programId}",
            defaults: new { controller = "Survey", action = "Index" },
            namespaces: new[] { "Cobalt.Controllers" }
            );

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

Thanks in advance!

have you considered using RouteAttributes? Makes this a lot easier IMHO — Jonesopolis
– Jonesopolis, Commented Oct 22, 2015 at 18:20

Brandon McAlees · Accepted Answer · 2015-10-23 14:32:26Z

4

For my specific problem, I could only use RouteAttributes as suggested by Jonesopolis and Tommy.

I ended up adding

[Route("Survey/View/{surveyId}/{surveyWaveId}/{programId}")]

and

[Route("Survey/View/{hash}")]

above my controller actions, and added

routes.MapMvcAttributeRoutes();

to the RouteConfig.

answered Oct 23, 2015 at 14:32

Brandon McAlees

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1 Comment

anubhava Over a year ago

You may want to vote to undelete your question

Fenton · Accepted Answer · 2015-10-23 20:00:47Z

4

The best (and easiest) option would be to name your actions to say a bit more about what they are for... unless Index really is the appropriate name for both of these.

    routes.MapRoute(
        name: "SurveyIconLink",
        url: "Survey/Icon/{surveyId}/{surveyWaveId}/{programId}",
        defaults: new { controller = "Survey", action = "Index" },
        namespaces: new[] { "Cobalt.Controllers" }
        );

    routes.MapRoute(
        name: "SurveyEmailLink",
        url: "Survey/Email/{hash}",
        defaults: new { controller = "Survey", action = "Index"},
        namespaces: new[] { "Cobalt.Controllers" }
        );

edited Oct 23, 2015 at 20:00

answered Oct 22, 2015 at 18:25

Fenton

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4 Comments

Tommy Over a year ago

A orange upward arrow for suggesting the easiest fix (change the action name)

Brandon McAlees Over a year ago

@Tommy both these action's return the same result, they just use different information to get there. So I would like them to be named the same for consistency.

Brandon McAlees Over a year ago

@Steve I switched the order and it still returns plain text HTML with the ambiguousMatch exception, any idea why?

Tommy Over a year ago

@BrandonMcAlees - You cannot have two ActionMethods defined named the same as the model binder cannot use the parameter list to distinguish between the two. You have to use attribute routing (as suggested in a comment under your question) or rename on of the action methods. stackoverflow.com/questions/436866/…

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