عمليات الاضافة والحذف والتعديل ASP.NET Core MVC .NET 8 (CRUD)

Install-Package Microsoft.EntityFrameworkCore -Version 8.0.11
Install-Package Microsoft.EntityFrameworkCore.Design -Version 8.0.11
Install-Package Microsoft.EntityFrameworkCore.SqlServer -Version 8.0.11
Install-Package Microsoft.EntityFrameworkCore.Tools -Version 8.0.11

public class User
  {
      public int Id { get; set; }
      public string FirstName { get; set; } = string.Empty;
      public string LastName { get; set; } = string.Empty;
  }

public class DataContext : DbContext
{
    public DataContext(DbContextOptions options) : base(options)
    {
    }

    public DbSet<User> Users { get; set; }
}

 "ConnectionStrings": {
   "MVCCrudTest": "Server=.\\SQLEXPRESS;Database=MVCCrudoperation;Trusted_Connection=True;TrustServerCertificate=Yes"
 }

builder.Services.AddDbContext<datacontext>(options =><br>options.UseSqlServer(builder.Configuration.GetConnectionString("MVCCrudTest")));</datacontext>

Add-Migration intialMigration

Update-Database

public UserController(DataContext context)
{
    _context = context;
}

public async Task<IActionResult> List()
{
    var users = await _context.Users.ToListAsync();
    return View(users);
}

@model List<User> 
@{
}
<a asp-area="" asp-controller="User"
   asp-action="Add"
 class="btn btn-primary">Add User</a>

<table class="table">
    <thead>
        <tr>
            <td>Id</td>
            <td>First Name</td>
            <td>Last Name</td>
            <td></td>
        </tr>
    </thead>
    <tbody>
        @foreach (var user in Model)
        {
            <tr>
                <td>@user.Id</td>
                <td>@user.FirstName</td>
                <td>@user.LastName</td>
                <td>
                    <a asp-area="" asp-controller="User"
                       asp-action="Edit"
                       asp-route-id="@user.Id" class="btn btn-info">Edit</a>

                    <a asp-area="" asp-controller="User"
                       asp-action="Delete"
                       asp-route-id="@user.Id" class="btn btn-danger">Delete</a>
                </td>
            </tr>
        }
       
    </tbody>
</table>

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

     [HttpPost]
     public async Task<IActionResult> Add(User user)
     {
         _context.Users.Add(user);
         await _context.SaveChangesAsync();
         return RedirectToAction("List");
     }

@model User
@{
}

<form method="post">
    <div class="mb-3">
        <label class="form-label">First Name</label>
        <input type="text" id="firstName" class="form-control" asp-for="FirstName" required />
        <span class="text-danger" asp-validation-for="FirstName"></span>
    </div>

    <div class="mb-3">
        <label class="form-label">Last Name</label>
        <input type="text" id="lastName" class="form-control" asp-for="LastName" required />
        <span class="text-danger" asp-validation-for="LastName"></span>
    </div>

    <div class="mb-3">
        <button type="submit" class="btn btn-dark">Add New User</button>
    </div>
</form>

[HttpGet]
public IActionResult Edit(int id)
{
    var user = _context.Users.Find(id);
    return View(user);
}

[HttpPost]
public async Task<IActionResult> Edit(User user)
{
    var dbUser = await _context.Users.FindAsync(user.Id);
    if (dbUser != null)
    {
        dbUser.FirstName = user.FirstName;
        dbUser.LastName = user.LastName;
        await _context.SaveChangesAsync();
    }

    return RedirectToAction("List");
}

@model User
@{
}

<form method="post">
    <input type="hidden" asp-for="Id" />
    <div class="mb-3">
        <label class="form-label">First Name</label>
        <input type="text" id="firstName" class="form-control" asp-for="FirstName" required />
        <span class="text-danger" asp-validation-for="FirstName"></span>
    </div>

    <div class="mb-3">
        <label class="form-label">Last Name</label>
        <input type="text" id="lastName" class="form-control" asp-for="LastName" required />
        <span class="text-danger" asp-validation-for="LastName"></span>
    </div>

    <div class="mb-3">
        <button type="submit" class="btn btn-dark">Edit User</button>
    </div>
</form>

 [HttpGet]
 public async Task<IActionResult> Delete(int id)
 {
     var user = _context.Users.Find(id);
     if (user != null)
     {
         _context.Remove(user);
         await _context.SaveChangesAsync();
     }
     return RedirectToAction("List");
 }