Loosely Coupled Controller Index

MoviesController.cs

using System;
using System.Data.Entity;
using System.Net;
using System.Web.Mvc;
using MvcMovie.Core.Interfaces;
using MvcMovie.Infrastructure.Data;
using MvcMovie.Infrastructure.Data.Repositories;
using MvcMovie.Models;

namespace MvcMovie.Controllers
{
    public class MoviesController : Controller
    {
        private readonly IMovieRepository _movieRepository;
        private MovieDbContext db = new MovieDbContext();

        public MoviesController(IMovieRepository movieRepository)
        {
            _movieRepository = movieRepository;
        }

        public MoviesController()
            : this(new EfMovieRepository())
        { }

        // GET: /Movies/
        public ActionResult Index(string movieGenre, string searchString)
        {
            ViewBag.movieGenre =
                new SelectList(_movieRepository.ListGenres());

            return View(_movieRepository.ListMovies(movieGenre, searchString));
        }
    }
}