demo001/Controllers/TodoItemsController.cs

using Demo001.Data;
using Demo001.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace Demo001.Controllers;

[ApiController]
[Route("api/[controller]")]
public class TodoItemsController : ControllerBase
{
    private readonly AppDbContext _context;

    public TodoItemsController(AppDbContext context)
    {
        _context = context;
    }

    [HttpGet]
    public async Task<ActionResult<IEnumerable<TodoItem>>> GetTodoItems()
    {
        return await _context.TodoItems.ToListAsync();
    }

    [HttpGet("{id}")]
    public async Task<ActionResult<TodoItem>> GetTodoItem(int id)
    {
        var item = await _context.TodoItems.FindAsync(id);
        return item is null ? NotFound() : item;
    }

    [HttpPost]
    public async Task<ActionResult<TodoItem>> CreateTodoItem(TodoItem item)
    {
        _context.TodoItems.Add(item);
        await _context.SaveChangesAsync();

        return CreatedAtAction(nameof(GetTodoItem), new { id = item.Id }, item);
    }

    [HttpPut("{id}")]
    public async Task<IActionResult> UpdateTodoItem(int id, TodoItem item)
    {
        if (id != item.Id)
        {
            return BadRequest();
        }

        if (!await _context.TodoItems.AnyAsync(x => x.Id == id))
        {
            return NotFound();
        }

        _context.Entry(item).State = EntityState.Modified;
        await _context.SaveChangesAsync();

        return NoContent();
    }

    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteTodoItem(int id)
    {
        var item = await _context.TodoItems.FindAsync(id);
        if (item is null)
        {
            return NotFound();
        }

        _context.TodoItems.Remove(item);
        await _context.SaveChangesAsync();

        return NoContent();
    }
}