Asp.Net Core MVC 

Asp.net Core MVC Basic Model
**********************************************
Asp.net Core MVC Basic Model
namespace WebApplication9.Models
{
    public class Employee
    {
        public int EmpID { get; set; }
        public string EmpName { get; set; }
        public string Gender { get; set; }
        public string City { get; set; }
        public int Age { get; set; }
    }
}
 public IActionResult Index()
        {
List<Employee> EmployeeS = new List<Employee>  
//var EmployeeS = new List<Employee> 
{
                    new Employee { EmpID = 1, EmpName = "Varun", Gender = "Male", City = "Agra", Age = 23 },
                    new Employee { EmpID = 2, EmpName = "Akash", Gender = "Male", City = "Jharkhan", Age = 25 },
                    new Employee { EmpID = 3, EmpName = "Pravin", Gender = "Male", City = "Delhi", Age = 29 },
                    new Employee { EmpID = 4, EmpName = "Nilay", Gender = "Male", City = "Noida", Age = 24 }
                };

            return View(EmployeeS); 
 }


@model List<Employee>  

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>
        Learn about <a href="https://learn.microsoft.com/aspnet/core" target="_blank">building Web apps with ASP.NET Core</a>.
    </p>
</div>

<table class="table table-bordered table-striped">
    <thead>
        <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Gender</th>
            <th>City</th>
            <th>Age</th>
        </tr>
    </thead>
    <tbody>
        @foreach (var emp in Model)
        {
            <tr>
                <td>@emp.EmpID</td>
                <td>@emp.EmpName</td>
                <td>@emp.Gender</td>
                <td>@emp.City</td>
                <td>@emp.Age</td>
            </tr>
        }
    </tbody>
</table>
**********************************************
Basic Configuration
ASP.NET CORE
Route Configuration

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllersWithViews();
var app = builder.Build();

//app.MapGet("/", () => "Hello World!");

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=home}/{action=index}/{id?}"
);

app.Run();


*****************************************************************

var builder = WebApplication.CreateBuilder(args);

// Add services to the container
builder.Services.AddControllersWithViews();

var app = builder.Build();

// Enable static files to serve CSS, JavaScript, and images from wwwroot folder
app.UseStaticFiles();

// Configure routing for MVC
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}"
);

app.Run();




HOMECONTROLLER
************************************************************
using Microsoft.AspNetCore.Mvc;
using LibraLibrary_MVC1.Models;
using LibraLibrary_MVC1.DataContext;


namespace LibraLibrary_MVC1.Controllers
{
    public class HomeController : Controller
    {
        private readonly ApplicationDBContext _context;

        public HomeController(ApplicationDBContext context)
        {
            _context = context;
        }

        public IActionResult Index()
        {
            return View();
        }

        [HttpGet]
        public IActionResult Login()
        {
            return View();
        }

        [HttpPost]
        public IActionResult Login(LoginViewModel model)
        {
            if (!ModelState.IsValid)
            {
                return View(model);
            }

            // Check Admin login
            var admin = _context.Admins
                .FirstOrDefault(a => a.UserName == model.Username && a.Password == model.Password);

            if (admin != null)
            {
                //TempData["UserRole"] = "Admin";
                //TempData["UserName"] = admin.Name;

                HttpContext.Session.SetString("UserRole", "Admin");
                HttpContext.Session.SetString("UserName", admin.Name);

                return RedirectToAction("AdminDashboard", "Admin");
              
            }

            // Check Student login
            var student = _context.Students
                .FirstOrDefault(s => s.Email == model.Username && s.Password == model.Password);

            if (student != null)
            {
                HttpContext.Session.SetString("UserRole", "Student");
                HttpContext.Session.SetString("UserName", student.FirstName);

                return RedirectToAction("Dashboard", "Student");
            }

            ModelState.AddModelError("", "Invalid username or password");
            return View(model);
        }
    }
}


LOGIN PAGE
*****************************************************************************

@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@model LibraLibrary_MVC1.Models.LoginViewModel


<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta content="width=device-width, initial-scale=1.0" name="viewport">

  <title>Libr library Login</title>
  <meta content="" name="description">
  <meta content="" name="keywords">

  <!-- Favicons -->
  <link href="~/assets2/img/favicon.png" rel="icon">
  <link href="~/assets2/img/apple-touch-icon.png" rel="apple-touch-icon">

  <!-- Google Fonts -->
  <link href="https://fonts.gstatic.com" rel="preconnect">
  <link href="https://fonts.googleapis.com/css?family=Open+Sans:300,300i,400,400i,600,600i,700,700i|Nunito:300,300i,400,400i,600,600i,700,700i|Poppins:300,300i,400,400i,500,500i,600,600i,700,700i" rel="stylesheet">

  <!-- Vendor CSS Files -->
  <link href="~/assets2/vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
  <link href="~/assets2/vendor/bootstrap-icons/bootstrap-icons.css" rel="stylesheet">
  <link href="~/assets2/vendor/boxicons/css/boxicons.min.css" rel="stylesheet">
  <link href="~/assets2/vendor/quill/quill.snow.css" rel="stylesheet">
  <link href="~/assets2/vendor/quill/quill.bubble.css" rel="stylesheet">
  <link href="~/assets2/vendor/remixicon/remixicon.css" rel="stylesheet">
  <link href="~/assets2/vendor/simple-datatables/style.css" rel="stylesheet">

  <!-- Template Main CSS File -->
  <link href="~/assets2/css/style.css" rel="stylesheet">

  <!-- =======================================================
  * Template Name: NiceAdmin - v2.5.0
  * Template URL: https://bootstrapmade.com/nice-admin-bootstrap-admin-html-template/
  * Author: BootstrapMade.com
  * License: https://bootstrapmade.com/license/
  ======================================================== -->
</head>

<body>

    <main>
        <div class="container">
            <section class="section register min-vh-100 d-flex flex-column align-items-center justify-content-center py-4">
                <div class="container">
                    <div class="row justify-content-center">
                        <div class="col-lg-4 col-md-6 d-flex flex-column align-items-center justify-content-center">

                            <div class="d-flex justify-content-center py-4">
                                <a href="/" class="logo d-flex align-items-center w-auto">
                                    <img src="~/assets2/img/logo.png" alt="">
                                    <span class="d-none d-lg-block">Libra Library</span>
                                </a>
                            </div><!-- End Logo -->

                            <div class="card mb-3">
                                <div class="card-body">

                                    <div class="pt-4 pb-2">
                                        <h5 class="card-title text-center pb-0 fs-4">Login to Your Account</h5>
                                        <p class="text-center small">Enter your username & password to login</p>
                                    </div>


                                    <form asp-action="Login" method="post" class="row g-3 needs-validation" novalidate>

                                        <!-- Validation summary (displays model-level errors) -->
                                        <div class="col-12">
                                            <div asp-validation-summary="All" class="text-danger"></div>
                                        </div>

                                        <!-- Username Field -->
                                        <div class="col-12">
                                            <label asp-for="Username" class="form-label">Username</label>
                                            <div class="input-group has-validation">
                                                <input asp-for="Username" id="Username" class="form-control" />
                                                <span asp-validation-for="Username" class="text-danger"></span>
                                            </div>
                                        </div>

                                        <!-- Password Field -->
                                        <div class="col-12">
                                            <label asp-for="Password" class="form-label">Password</label>
                                            <div class="input-group has-validation">
                                                <input asp-for="Password" id="Password" class="form-control" type="password" />
                                                <span asp-validation-for="Password" class="text-danger"></span>
                                            </div>
                                        </div>

                                        <!-- Remember Me -->
                                        <div class="col-12">
                                            <div class="form-check">
                                                <input class="form-check-input" type="checkbox" name="remember" value="true" id="rememberMe">
                                                <label class="form-check-label" for="rememberMe">Remember me</label>
                                            </div>
                                        </div>

                                        <!-- Submit Button -->
                                        <div class="col-12">
                                            <button class="btn btn-primary w-100" type="submit">Login</button>
                                        </div>

                                        <!-- Register Link -->
                                        <div class="col-12">
                                            <p class="small mb-0">Don't have an account? <a href="pages-register.html">Create one</a></p>
                                        </div>

                                    </form>




                                  @*   <form asp-action="Login" method="post" class="row g-3 needs-validation" novalidate>
                                        <div class="col-12">
                                            <label asp-for="Username" class="form-label">Username</label>
                                            <div class="input-group has-validation">
                                                <input asp-for="Username" class="form-control" />
                                                <span asp-validation-for="Username" class="text-danger"></span>
                                            </div>
                                        </div>

                                        <div class="col-12">
                                            <label asp-for="Password" class="form-label">Password</label>
                                            <input asp-for="Password" class="form-control" type="password" />
                                            <span asp-validation-for="Password" class="text-danger"></span>
                                        </div>

                                        <div class="col-12">
                                            <div class="form-check">
                                                <input class="form-check-input" type="checkbox" name="remember" value="true" id="rememberMe">
                                                <label class="form-check-label" for="rememberMe">Remember me</label>
                                            </div>
                                        </div>

                                        <div class="col-12">
                                            <button class="btn btn-primary w-100" type="submit" >Login</button>
                                        </div>

                                        <div class="col-12">
                                            <p class="small mb-0">Don't have an account? <a href="pages-register.html">Create one</a></p>
                                        </div>
                                    </form> *@

                                </div>
                            </div>

                            <div class="credits">
                             @*    Designed by <a href="https://bootstrapmade.com/">BootstrapMade</a> *@
                            </div>

                        </div>
                    </div>
                </div>
            </section>
        </div>
    </main>



  <!-- End #main -->

  <a href="#" class="back-to-top d-flex align-items-center justify-content-center"><i class="bi bi-arrow-up-short"></i></a>

  <!-- Vendor JS Files -->
  <script src="~/assets2/vendor/apexcharts/apexcharts.min.js"></script>
  <script src="~/assets2/vendor/bootstrap/js/bootstrap.bundle.min.js"></script>
  <script src="~/assets2/vendor/chart.js/chart.umd.js"></script>
  <script src="~/assets2/vendor/echarts/echarts.min.js"></script>
  <script src="~/assets2/vendor/quill/quill.min.js"></script>
  <script src="~/assets2/vendor/simple-datatables/simple-datatables.js"></script>
  <script src="~/assets2/vendor/tinymce/tinymce.min.js"></script>
  <script src="~/assets2/vendor/php-email-form/validate.js"></script>

  <!-- Template Main JS File -->
  <script src="~/assets2/js/main.js"></script>

</body>

</html>

LOGINVIEWMODEL
********************************************************************

using System.ComponentModel.DataAnnotations;

namespace LibraLibrary_MVC1.Models
{
    public class LoginViewModel
    {
        [Required(ErrorMessage = "Username is required")]
        public string Username { get; set; }

        [Required(ErrorMessage = "Password is required")]
        public string Password { get; set; }
    }

}


APLICATIONDBCONTEXT
*************************************************************

using LibraLibrary_MVC1.Models;
using Microsoft.EntityFrameworkCore;

namespace LibraLibrary_MVC1.DataContext
{
    public class ApplicationDBContext : DbContext
    {
        public ApplicationDBContext(DbContextOptions<ApplicationDBContext> options) : base(options)
        {
        }
        public DbSet<Admin> Admins { get; set; }
        public DbSet<Student> Students { get; set; }
    }
}


ADMINCONTROLLER
*****************************************************

using Microsoft.AspNetCore.Mvc;

namespace LibraLibrary_MVC1.Controllers
{
    public class AdminController : Controller
    {
        public IActionResult Index()
        {
            return View();
        }

        public IActionResult AdminDashboard()
        {
            return View();
        }
    }
}

PROGRAMME.CS
*************************************************************
using LibraLibrary_MVC1.DataContext;
using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);
//var connectionString = builder.Configuration.GetConnectionString("LibraConnection");

// ❗ Register services BEFORE building the app
builder.Services.AddControllersWithViews();

builder.Services.AddDbContext<ApplicationDBContext>(options =>
    options.UseSqlServer(builder.Configuration.GetConnectionString("LibraConnection"))
);
//builder.Services.AddDbContext<ApplicationDBContext>(options =>
//    options.UseSqlServer("LibraConnection")
//);

builder.Services.AddSession(options =>
{
    options.IdleTimeout = TimeSpan.FromMinutes(30);  // Set session timeout
    options.Cookie.HttpOnly = true;
    options.Cookie.IsEssential = true;
});

// ❗ Now build the app
var app = builder.Build();

// Middleware pipeline
app.UseStaticFiles();
app.UseRouting();
app.UseHttpsRedirection();
app.UseSession();
//app.UseAuthentication();
//app.UseAuthorization(); 

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}"
);

app.Run();

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