mvc core chapter -2

 1. repository -- add inumerable<>functioname() --- for looping in view like list in python for each esma a

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

namespace God_Helpme_ConquerGreatness.Models

{

    public interface IEmployeeRepository

    {

        

        Employee GetEmployee(int id);

        IEnumerable<Employee> GetAllEmployees();

    }

}

2. implementing it in repository and returning whole list because we want to display whole list .

using System;

using System.Collections.Generic;

using System.Linq;

using System.Threading.Tasks;

namespace God_Helpme_ConquerGreatness.Models

{

    public class MockEmployeeRepository : IEmployeeRepository

    {

        private List<Employee> _employeeList; //private field of type list 

        public MockEmployeeRepository() //constructor of a class

        {

            _employeeList = new List<Employee>() //remember getter and setters of employee class

            {

            new Employee(){ id=1, Name="Rajan", Department="IT",Email="rajan@centurybank.com.np"},

            new Employee() { id = 2, Name = "Shobhana", Department = "Branding and Communication", Email = "shobhana@centurybank.com.np" },

            new Employee() { id = 3, Name = "Kriti", Department = "Loan", Email = "kriti@centurybank.com.np" }

             };

        }

        public IEnumerable<Employee> GetAllEmployees()

        {

            return _employeeList;

        }

        public Employee GetEmployee(int id)

        {

        return _employeeList.FirstOrDefault(e => e.id == id);

        }

    }

}

3. HomeController -- showing all list in index 

using God_Helpme_ConquerGreatness.Models;

using God_Helpme_ConquerGreatness.NewFolder1;

using Microsoft.AspNetCore.Mvc;

using Microsoft.Extensions.Logging;

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.Linq;

using System.Threading.Tasks;

namespace God_Helpme_ConquerGreatness.Controllers

{

    public class HomeController : Controller

    {

       // private readonly ILogger<HomeController> _logger;

        private readonly IEmployeeRepository _employeeRepository;

        public HomeController(IEmployeeRepository employeeRepository) //injecting interface to the constructor and name this as employeeRepository 

        {

            _employeeRepository = employeeRepository;

        }

        public ViewResult Details() //strongly typed view .. passing model to view

        {

            HomeDetailViewModel homeDetailViewModel = new HomeDetailViewModel()

            {

                employee = _employeeRepository.GetEmployee(1),

                pagetitle = "Employee Details"

            };

            string s = "alu";

            string d = "talu ma";

            string name = $"My fullname is {s}{d}";

            ViewBag.game = name;

            return View(homeDetailViewModel);

        }

      

        // public ViewResult Details()  //using view bag

        //{

        //  Employee eee = _employeeRepository.GetEmployee(1);

        //ViewBag.Employee = eee;

        //ViewBag.PageTitle = "Employee Details";

        //return View();

        //}

        //  public ViewResult Details() //using view Data

        // {

        //  Employee eee = _employeeRepository.GetEmployee(1);

        // ViewData["Employee"] = eee;

        // ViewData["PageTitle"] = "Employee Details";

        //return View();

        // }

        //public ObjectResult Details() //returing xml or jsonresult

        // {

        //   Employee eee = _employeeRepository.GetEmployee(1);

        //   return new ObjectResult(eee);

        //return _employeeRepository.GetEmployee(1).Name;

        // return Json(new { id = 1, name = "Rajan" }); //anonymyus object

        // }

        // public HomeController(ILogger<HomeController> logger)

        //{

        // _logger = logger;

        //  }

        public ViewResult Index()

        {

            var model = _employeeRepository.GetAllEmployees();

            return View(model);

        }

        public IActionResult Privacy()

        {

            return View();

        }

        //this process if constructor injection

       

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]

        public IActionResult Error()

        {

            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });

        }

    }

}

4. view:

    @model IEnumerable<God_Helpme_ConquerGreatness.Models.Employee>

    

    

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <title>ViewData["Title"]</title>

</head>

<body>

    <div class="text-center">

        <h1 class="display-4">Welcome</h1>

        <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>

    </div>

    <table>

        <thead>

            <tr>

                <th>ID </th>

                <th>Name </th>

                <th>Email </th>

                <th>Department</th>

            </tr>

        </thead>

        <tbody>

            @foreach (var employee in Model)

            { 

            <tr>

                <td>@employee.id</td>

                <td>@employee.Name</td>

                <th>@employee.Email </th>

                <td>@employee.Department</td>

            </tr>

            }

        </tbody>

    </table>>

</body>

</html>