C# :Unity container and ILogger

Question

I'm working on ASP .Net MVC5 project, I'm using ILogger interface inder Microsoft.Extensions.Logging and Unity framework for DI.

What I want is to inject ILogger into my project to use it in my controllers.

I installed Unity and Unity.MVC nuget packages in my project and I tried to inject ILogger like this :

 public static void RegisterTypes(IUnityContainer container)
        {
            container.RegisterType(typeof(ILogger<>), typeof(Logger<>), (new HierarchicalLifetimeManager()));
        }

My controller :

public class HomeController : Controller
    {
        private readonly ILogger _logger;

        public HomeController(ILogger logger)
        {
            _logger = logger;
        }
        public ActionResult Index()
        {
            _logger.LogInformation("TEST log event message");

            return View();
        }

Always when I run the project I get this error :

You only registered the generic version of ILogger<> while your controller is expecting the non-generic version. Did you try to simply register Logger as ILogger? — haim770
– haim770, Commented Mar 11, 2019 at 14:34

Diego Jancic · Accepted Answer · 2021-10-11 20:10:47Z

3

You registered ILogger<T> but your HomeController expects ILogger. Unity container is trying to build an ILogger; it is an interface so it has no public ctor.

Change your HomeController ctor to this to make your registrations work...

public HomeController(ILogger<HomeController> logger)

edited Oct 11, 2021 at 20:10

Diego Jancic

7,5287 gold badges55 silver badges81 bronze badges

answered Feb 10, 2020 at 23:35

Sean M

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