How can I get the current route name with ASP.NET Core?

Question

I have an application that is written on the top of ASP.NET Core 2.2 framework.

I have the following controller

public class TestController : Controller
{
    [Route("some-parameter-3/{name}/{id:int}/{page:int?}", Name = "SomeRoute3Name")]
    [Route("some-parameter-2/{name}/{id:int}/{page:int?}", Name = "SomeRoute2Name")]
    [Route("some-parameter-1/{name}/{id:int}/{page:int?}", Name = "SomeRoute1Name")]
    public ActionResult Act(ActVM viewModel)
    {
        // switch the logic based on the route name

        return View(viewModel);
    }
}

How can I get the route name in the action and/or the view?

Answer 1

Inside of a controller, you can read the AttributeRouteInfo from the ControllerContext's ActionDescriptor. AttributeRouteInfo has a Name property, which holds the value you're looking for:

public ActionResult Act(ActVM viewModel)
{
    switch (ControllerContext.ActionDescriptor.AttributeRouteInfo.Name)
    {
        // ...
    }

    return View(viewModel);
}

Inside of a Razor view, the ActionDescriptor is available via the ViewContext property:

@{
    var routeName = ViewContext.ActionDescriptor.AttributeRouteInfo.Name;
}

Answer 2

For me the answer by @krik-larkin didn't work as AttributeRouteInfo was always null in my case.

I used the following code instead:

var endpoint = HttpContext.GetEndpoint() as RouteEndpoint;
var routeNameMetadata = endpoint?.Metadata.OfType<RouteNameMetadata>().SingleOrDefault();
var routeName = routeNameMetadata?.RouteName;