How to solve this same routing pattern issue in ASP.NET MVC routing?

Question

I'm practicing ASP.NET MVC routing and now I'm stuck at a situation which I don't understand how to solve. I have two controllers and action in both controllers and two routes in RouteConfig class - which looks like this:

routes.MapRoute(
        name: "Students",
        url: "{Class}/{Students}",
        defaults: new { controller = "Class", action = "Students" });
        
        routes.MapRoute(
        name: "SubjectDetail",
        url: "{Class}/{Subject}",
        defaults: new { controller = "Subject", action = "SubjectDetail"});

Now the problem is when I go to the class/Students URL, it works fine, but in case of class/subject, it again redirects me to the class/Students URL.

I know there is some route pattern mistakes. How to solve this issue?

Thanks

but in case of class/subject it again redirects me to the class/Students -- That's because both of your routes have the same signature. How is the routing engine supposed to differentiate between a student and a subject, if both URLs look the same? — Robert Harvey
– Robert Harvey, Commented May 29, 2018 at 17:29
That's why i ask. How can i differentiate?. How can I use same pattern for different controllers? — Nerd Programmer
– Nerd Programmer, Commented May 29, 2018 at 17:31
Your urls are exactly the same even though the template variables ({Students}, {Subject}) have different names. For example if you call cs101/bob, there is no way to know whether bob is a student or a subject. Since the Students route is defined first, it uses it. — Yuli Bonner
– Yuli Bonner, Commented May 29, 2018 at 17:31
You should add something to the route to differentiate it use {Class}/Students/{Name} and {Class}/Subject/{Title} , for example. — Yuli Bonner
– Yuli Bonner, Commented May 29, 2018 at 17:33

Yuli Bonner · Accepted Answer · 2018-05-29 17:39:20Z

1

Try:

routes.MapRoute(
        name: "Students",
        url: "classes/{classId}/students/{studentId}",
        defaults: new { controller = "Class", action = "Students" });

        routes.MapRoute(
        name: "SubjectDetail",
        url: "classes/{classId}/subjects/{subjectId}",
        defaults: new { controller = "Subject", action = "SubjectDetail"});

edited May 29, 2018 at 17:39

answered May 29, 2018 at 17:34

Yuli Bonner

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