Inject dependency into Controller.

Question

Hi

I am trying inject dependency into my controller but object of IService is getting null,

i have written an code as below

 

public interface IService

{

string GetData(string data);

}

 

public class Service:IService

{

   public string GetData(string data)

   {

       return " new data:"+data;

   } 

} 

 

my controller

public class HomeController:Controller

{

 private IService _service;

   public HomeController(IService service)

   {

      _service=service;

   }

 

public ActionResult Index()

  string data=_service.GetData("new in MVC");  //here i am getting NullValueException.

 return View();

} 

 

and object _service  is getting null.

so please let me know how to fixed this problem....