How to get Action and Controller name in ASP.Net Core MVC app?

Question

How to get Action and Controller names in ASP.Net MVC Core RC1 Application in Startup.cs?

I want to create a middleware and log the information (I want to Log detailed response to my Database, so I need Action and Controller info.) after following code in configure method of startup.cs -

 app.UseMvc(routes =>
{
     routes.MapRoute(
            name: "default",
            template: "{controller=User}/{action=Index}/{id?}");
 });

//Want to get Action and controller names here..

Answer 1

You'll want to inject the IActionDescriptorCollectionProvider service into your middleware. From that, you can use the property ActionDescriptors.Items to get a list of ActionDescriptor, which has all the route values for that action. If you cast that to ControllerActionDescriptor, you'll have access to ControllerName and ActionName.

Answer 2

This is how I do it in my custom exception handler middleware.

using System.Diagnostics;

frame = new StackTrace(e, true).GetFrame(0);
controller = frame.GetMethod().DeclaringType.FullName;
action = frame.GetMethod().ToString();

If you'd like to checkout the middleware project, here's the link CustomExceptionHandler

EDIT:
You could also do your logging in an action filter. The OnActionExecuting() method of an action filter has an ActionExecutingContext parameter. With that parameter you can get all kinds of info about the request. Below is how you would get the controller and action name. And I would suggest doing it in a separate thread to help with responsiveness.

public override void OnActionExecuting(ActionExecutingContext context)
{
    var t = Task.Run(() => {
        controller = context.Controller.ToString();
        action = context.ActionDescriptor.Name;

        //Log to DB
    }
}