Map Custom Route ASP.NET MVC5

Question

I haven't used .NET Routing before. I have a URL: http://myurl.com/Account/Login/?IsIPA=true. I want to be able to hit this URL with the following: http://myurl.com/IPA

This is the only custom route I want hit.

Can I create a route just for a single URL like this?

My code that isn't working is:

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

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

I get the error:

The constraint entry IsIPA on the route with route template Account/Login/{IsIPA}=True must have a string value or be of a type which implements System.Web.Routing.IRouteConstraint.

Try... routes.MapRoute("IPA", "Account/Login/{IsIPA}", new { controller = "Account", action = "Login", IsIPA = "true" }); — Ray Suelzer
– Ray Suelzer, Commented Mar 3, 2015 at 5:10

NightOwl888 · Accepted Answer · 2015-03-03 13:35:44Z

13

Route matching is similar to a switch case statement. The url parameter and any default values and constraints are all considered to determine whether or not it is a match with the incoming URL. If the route matches, it will then create a dictionary of route values based on the configuration. If the route does not match, the next route in the collection is tried until a match is found (or not).

This means the order that routes are specified is important. The default route matches any URL with 0, 1, 2, or 3 segments. Therefore, in most cases you will need to define your custom route before the default route.

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

    routes.MapRoute(
        name: "IPA", 
        url: "IPA", 
        defaults: new { controller = "Account", action = "Login", IsIPA = "true" });

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

The above configuration will route http://myurl.com/IPA to the Controller named Account and Action method named Login, and pass the additional route key IsIPA. This same URL will be built for the Controller/Action/IsIPA combination because it is the first one that matches in the list.

Note that the original URL http://myurl.com/Account/Login/?IsIPA=true will still work and still route to the same location. This configuration just adds an extra route to that resource.

answered Mar 3, 2015 at 13:35

NightOwl888

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3 Comments

Rhys Stephens Over a year ago

There is a problem with this where using RedirectToAction("Login", "Account") and Url.Action("Login", "Account") both redirect to ~/IPA even when the boolean IsIPA is false. It's solved by calling IsIPA is false explicitly: RedirectToAction("Login", "Account", new { IsIPA = false }) or Url.Action("Login", "Account", new { IsIPA = false }) Is there a way to make it not route IsIPA = true by default?

NightOwl888 Over a year ago

If you set the default value in the route to false instead of true, the default will be false. But if you need to override the default, you either need a different route that matches under different conditions (with a different default value), or you need to explicitly supply the IsIPA route value. You could create a custom HTML helper extension to supply the IsIPA value, but if you use a single route you must supply it if you want it to be different from the default value.

Rhys Stephens Over a year ago

I am still having problems with this. E.g. if a user types in the incorrect password and hits Login from the normal /Account/Login (without IPA), the URL will incorrectly redirect to /IPA. If I add a new Route above the IPA route like below, when the user is accessing from /IPA and they type an incorrect password, it redirects to /Account/Login, hence losing the IPA branding. ` routes.MapRoute( name: "DefaultLogin", url: "Account/Login/", defaults: new { controller = "Account", action = "Login", IsIPA = UrlParameter.Optional });`

Ray Suelzer · Accepted Answer · 2015-03-03 05:12:26Z

0

Without testing it, I think that you want this:

routes.MapRoute("IPA", "Account/Login/{IsIPA}", 
               new { controller = "Account", action = "Login", IsIPA = "true"});

answered Mar 3, 2015 at 5:12

Ray Suelzer

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1 Comment

Rhys Stephens Over a year ago

I got: 404 Error: The resource cannot be found.

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