mvc6 controller action not called when using IOptions service

Question

In an aspnet5/mvc6 project I use the configuration builder to read the settings from appsettings.json:

public Startup(IHostingEnvironment env)
{
    var builder = new ConfigurationBuilder().AddJsonFile("appsettings.json");
    builder.AddEnvironmentVariables();
    Configuration = builder.Build();
}

public void ConfigureServices(IServiceCollection services)
{
    services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));
    services.AddMvc();
}

However, when I try to access the service from a controller, the action is not being called:

public IActionResult Index(IOptions<AppSettings> appSettings)
{
   return View();
}

If I remove the appSettings parameter the action is being called correctly. I don't get an error message. Do I need additional packages? Currently I'm using the following dependencies:

"dependencies": {
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final"
  }

Answer 1

Like haim770 commented I needed to inject IOption in the controller constructor.

public class HomeController : Controller
{
    public HomeController(IOptions<AppSettings> appSettings)
    {
        //logic
    }
}

Answer 2

If you want to inject your options through the action parameters, you need to decorate your options parameter with [FromServices] :

public IActionResult Index([FromServices] IOptions<AppSettings> appSettings)
{
   return View();
}

Though it's definitely supported, it's usually better to use constructor injection, as suggested by haim770.