MVC Routing .net Core

Question

In my earlier .net application I used to have the below routing in the route.config

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

Now I am moving to .Net Core and somehow I am not able to setup the similar routing in the startup.cs

I have tried as below this but it never hits.

 app.UseMvc(routes =>
            {  
                routes.MapRoute("testroute", "{tenant}/{controller}/{action}/{id}",
                        defaults: new { tenant = "GRE", controller = "Home", action = "Index" });

            });

HomeController.cs

public IActionResult Index(string tenant)
        {
            return View();
        }

Appreciate any sort of help or hints on how to make it work

Thanks,

Answer 1

Your id parameter, which is optional your asp.net mvc code, is not optional in asp.net core code and have no default, for that reason it does not match. To make it optional, add "?" to the name, or set a default:

app.UseMvc(routes =>
{
    routes.MapRoute("testroute", "{tenant}/{controller}/{action}/{id?}",
        defaults: new { tenant = "GRE", controller = "Home", action = "Index" });

});

You can also set defaults inline, like this:

routes.MapRoute("testroute", "{tenant=GRE}/{controller=Home}/{action=Index}/{id?}");