server/aspnetapp/Controllers/WebApi/CategoriesController.cs

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#nullable disable
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using aspnetapp;
using aspnetapp.Models;

namespace aspnetapp.Controllers.WebApi
{
    [Route("api/[controller]")]
    [ApiController]
    public class CategoriesController : ControllerBase
    {
        private readonly CounterContext _context;

        public CategoriesController(CounterContext context)
        {
            _context = context;
        }

        // GET: api/Categories
        [HttpGet]
        public async Task<ActionResult<IEnumerable<CategoryEntity>>> GetCategories()
        {
            return await _context.Categories.ToListAsync();
        }

        // GET: api/Categories/5
        [HttpGet("{id}")]
        public async Task<ActionResult<CategoryEntity>> GetCategoryEntity(int id)
        {
            var categoryEntity = await _context.Categories.FindAsync(id);

            if (categoryEntity == null)
            {
                return NotFound();
            }

            return categoryEntity;
        }

        // PUT: api/Categories/5
        // To protect from overposting attacks, see https://go.microsoft.com/fwlink/?linkid=2123754
        [HttpPut("{id}")]
        public async Task<IActionResult> PutCategoryEntity(int id, CategoryEntity categoryEntity)
        {
            if (id != categoryEntity.Id)
            {
                return BadRequest();
            }

            _context.Entry(categoryEntity).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();