Setting route defaults

We've seen how we can specify default values for route parameters in the template, but there's also another way: by overloading the MapControllerRoute extension method that takes an object containing default values. Instead of supplying these defaults as strings, you can have this:

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
        name: "default",
        pattern: "{controller}/{action}/{id?}",
        defaults: new { controller = "Home", action = "Index" });
});

This is valid even if you don't have the tokens in the route, as follows:

app.UseEndpoints(endpoints =>
{
    endpoints.MapControllerRoute(
        name: "default",
        pattern: "My/Route",
        defaults: new { controller = "My", action = "Route" });
});

Remember that you do have to supply controller and action; if they are not present in the template, they need to be supplied as defaults.

The next section delves into the inner workings of routes and how we can work around with requests.