Edit Page In Asp.Net Core

@page
@model BookManagementSystem.Pages.Books.BooksModel
@{
    ViewData["Title"] = "Books";
}


<h1>Books</h1>
<form method="post">
	<div class="col-4">
		<a asp-page="Create" class="btn btn-info form-control text-white"> Create new book</a>
	</div>
	<div class="col-12 m-1">
        @if (Model.Books.Count() > 0)
        {
            
		<table border="1">
			<tr>
				<th>
                        Name
                    </th>
				<th>
                        Author
                    </th>
				<th>
                        Edit
                    </th>
			</tr>
                @foreach (var item in Model.Books)
                {
                    
			<tr>
				<td>
                            @Html.DisplayFor(m => item.Name)
                        </td>
				<td>
                            @Html.DisplayFor(m => item.Author)
                        </td>
				<td>
					<a asp-page="Edit" asp-route-id="@item.Id" class="btn btn-success">Edit</a>
				</td>
			</tr>
                }

            
		</table>
        }
    
	</div>
</form>

@page
@model BookManagementSystem.Pages.Books.EditModel

<div class="border container" style="padding:30px">
	<form method="post">
		<div class="text-danger" asp-validation-summary="ModelOnly"></div>
		<input type="hidden" asp-for="MyBook.Id" />
		<div class="form-group row">
			<div class="col-3">
				<label asp-for="MyBook.Name"></label>
			</div>
			<div class="col-5">
				<input asp-for="MyBook.Name" class="form-control" />
			</div>
			<div class="col-4">
				<span asp-validation-for="MyBook.Name" class="text-danger"></span>
			</div>
		</div>
		<div class="form-group row">
			<div class="col-3">
				<label asp-for="MyBook.Author"></label>
			</div>
			<div class="col-5">
				<input asp-for="MyBook.Author" class="form-control" />
			</div>
			<div class="col-4">
				<span asp-validation-for="MyBook.Author" class="text-danger"></span>
			</div>
		</div>
		<div class="form-group row">
			<div class="col-4">
				<input type="submit" value="Update" class="btn btn-primary form-control" />
			</div>
		</div>
	</form>
</div>

@section Scripts{
    
<partial name="_ValidationScriptsPartial" />
}

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Threading.Tasks; 
using BookManagementSystem.Model; 
using Microsoft.AspNetCore.Mvc; 
using Microsoft.AspNetCore.Mvc.Filters; 
using Microsoft.AspNetCore.Mvc.RazorPages; 
  
namespace BookManagementSystem.Pages.Books { 
    public class EditModel: PageModel { 
        private readonly ApplicationDbContext _db; 
  
        public EditModel(ApplicationDbContext db) { 
                _db = db; 
            } 
            [BindProperty] 
        public Book MyBook { 
            get; 
            set; 
        } 
        public async Task OnGet(int id) { 
            MyBook = await _db.Book.FindAsync(id); 
        } 
  
        public async Task < IActionResult > OnPost() { 
            if (ModelState.IsValid) { 
                var BookMyDB = await _db.Book.FindAsync(MyBook.Id); 
                BookMyDB.Name = MyBook.Name; 
                BookMyDB.Author = MyBook.Author; 
                await _db.SaveChangesAsync(); 
                return RedirectToPage("Books"); 
            } else { 
                return Page(); 
            } 
        } 
    } 
} 

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