Delete operation in asp.net core razor pages

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In this video we will discuss how to implement Delete operation in ASP.NET Core razor pages project. Let's understand this with an example.


Razor pages delete example

When DELETE button is clicked, redirect the user to delete confirmation page




Delete confirmation page should be as shown below with Yes and No buttons.



IEmployeeRepository.cs

Include Delete() method which deletes by ID. The Deleted employee object will be returned back.

public interface IEmployeeRepository
{
    IEnumerable<Employee> GetAllEmployees();
    Employee GetEmployee(int id);
    Employee Update(Employee updatedEmployee);
    Employee Add(Employee newEmployee);
    Employee Delete(int id);
}

MockEmployeeRepository.cs

public class MockEmployeeRepository : IEmployeeRepository

{

    private List<Employee> _employeeList;

    public MockEmployeeRepository()

    {

        _employeeList = new List<Employee>()

    {

        new Employee() { Id = 1, Name = "Mary", Department = Dept.HR,

            Email = "mary@pragimtech.com", PhotoPath="mary.png" },

        new Employee() { Id = 2, Name = "John", Department = Dept.IT,

            Email = "john@pragimtech.com", PhotoPath="john.png" },

        new Employee() { Id = 3, Name = "Sara", Department = Dept.IT,

            Email = "sara@pragimtech.com", PhotoPath="sara.png" },

        new Employee() { Id = 4, Name = "David", Department = Dept.Payroll,

            Email = "david@pragimtech.com" },

    };

    }

    public Employee Delete(int id)

    {

        var employeeToDelete = _employeeList.FirstOrDefault(e => e.Id == id);

        if (employeeToDelete != null)

        {

            _employeeList.Remove(employeeToDelete);

        }

        return employeeToDelete;

    }

    // Rest of the code

}

Delete.cshtml.cs

using Microsoft.AspNetCore.Mvc;

using Microsoft.AspNetCore.Mvc.RazorPages;

using RazorPagesTutorial.Models;

using RazorPagesTutorial.Services;

namespace RazorPagesTutorial.Pages.Employees

{

    public class DeleteModel : PageModel

    {

        private readonly IEmployeeRepository employeeRepository;

        public DeleteModel(IEmployeeRepository employeeRepository)

        {

            this.employeeRepository = employeeRepository;

        }

        [BindProperty]

        public Employee Employee { get; set; }

        public IActionResult OnGet(int id)

        {

            Employee = employeeRepository.GetEmployee(id);

            if (Employee == null)

            {

                return RedirectToPage("/NotFound");

            }

            return Page();

        }

        public IActionResult OnPost()

        {

            Employee deletedEmployee = employeeRepository.Delete(Employee.Id);

            if (deletedEmployee == null)

            {

                return RedirectToPage("/NotFound");

            }

            return RedirectToPage("Index");

        }

    }

}

Delete.cshtml

@page "{id}"

@model RazorPagesTutorial.Pages.Employees.DeleteModel

@{

    ViewData["Title"] = "Delete";

}

<h1>Delete Confirmation</h1>

<div class="alert alert-danger">

    <h5>Are you sure you want to delete employee - @Model.Employee.Name</h5>

    <form method="post">

        <button type="submit" class="btn btn-danger">Yes</button>

        <a asp-page="/Employees/Index" class="btn btn-primary">No</a>

    </form>

</div>

Index.cshtml

Include the following Delete button on the employee list page (Employees/Index.cshtml). When the button is clicked, the request is redirected to Delete razor page, passing it the ID of the employee to delete as a route parameter.

<a asp-page="/Employees/Delete" asp-route-ID="@employee.Id"

   class="btn btn-danger m-1">Delete</a>