Controller

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using iFlytekDemo.Models;

namespace iFlytekDemo.Controllers
{   
    public class CitiesController : Controller
    {
        private readonly ICityRepository cityRepository;

        // If you are using Dependency Injection, you can delete the following constructor
        public CitiesController() : this(new CityRepository())
        {
        }

        public CitiesController(ICityRepository cityRepository)
        {
            this.cityRepository = cityRepository;
        }

        //
        // GET: /Cities/

        public ViewResult Index()
        {
            return View(cityRepository.AllIncluding(city => city.Employees));
        }

        //
        // GET: /Cities/Details/5

        public ViewResult Details(int id)
        {
            return View(cityRepository.Find(id));
        }

        //
        // GET: /Cities/Create

        public ActionResult Create()
        {
            return View();
        } 

        //
        // POST: /Cities/Create

        [HttpPost]
        public ActionResult Create(City city)
        {
            if (ModelState.IsValid) {
                cityRepository.InsertOrUpdate(city);
                cityRepository.Save();
                return RedirectToAction("Index");
            } else {
                return View();
            }
        }
        
        //
        // GET: /Cities/Edit/5
 
        public ActionResult Edit(int id)
        {
             return View(cityRepository.Find(id));
        }

        //
        // POST: /Cities/Edit/5

        [HttpPost]
        public ActionResult Edit(City city)
        {
            if (ModelState.IsValid) {
                cityRepository.InsertOrUpdate(city);
                cityRepository.Save();
                return RedirectToAction("Index");
            } else {
                return View();
            }
        }

        //
        // GET: /Cities/Delete/5
 
        public ActionResult Delete(int id)
        {
            return View(cityRepository.Find(id));
        }

        //
        // POST: /Cities/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {
            cityRepository.Delete(id);
            cityRepository.Save();

            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing) {
                cityRepository.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using iFlytekDemo.Models;

namespace iFlytekDemo.Controllers
{   
    public class EmployeesController : Controller
    {
        private readonly ICityRepository cityRepository;
        private readonly IEmployeeRepository employeeRepository;

        // If you are using Dependency Injection, you can delete the following constructor
        public EmployeesController() : this(new CityRepository(), new EmployeeRepository())
        {
        }

        public EmployeesController(ICityRepository cityRepository, IEmployeeRepository employeeRepository)
        {
            this.cityRepository = cityRepository;
            this.employeeRepository = employeeRepository;
        }

        //
        // GET: /Employees/

        public ViewResult Index()
        {
            return View(employeeRepository.AllIncluding(employee => employee.City));
        }

        //
        // GET: /Employees/Details/5

        public ViewResult Details(int id)
        {
            return View(employeeRepository.Find(id));
        }

        //
        // GET: /Employees/Create

        public ActionResult Create()
        {
            ViewBag.PossibleCities = cityRepository.All;
            return View();
        } 

        //
        // POST: /Employees/Create

        [HttpPost]
        public ActionResult Create(Employee employee)
        {
            if (ModelState.IsValid) {
                employeeRepository.InsertOrUpdate(employee);
                employeeRepository.Save();
                return RedirectToAction("Index");
            } else {
                ViewBag.PossibleCities = cityRepository.All;
                return View();
            }
        }
        
        //
        // GET: /Employees/Edit/5
 
        public ActionResult Edit(int id)
        {
            ViewBag.PossibleCities = cityRepository.All;
             return View(employeeRepository.Find(id));
        }

        //
        // POST: /Employees/Edit/5

        [HttpPost]
        public ActionResult Edit(Employee employee)
        {
            if (ModelState.IsValid) {
                employeeRepository.InsertOrUpdate(employee);
                employeeRepository.Save();
                return RedirectToAction("Index");
            } else {
                ViewBag.PossibleCities = cityRepository.All;
                return View();
            }
        }

        //
        // GET: /Employees/Delete/5
 
        public ActionResult Delete(int id)
        {
            return View(employeeRepository.Find(id));
        }

        //
        // POST: /Employees/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {
            employeeRepository.Delete(id);
            employeeRepository.Save();

            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing) {
                cityRepository.Dispose();
                employeeRepository.Dispose();
            }
            base.Dispose(disposing);
        }
    }
}