小编Tom*_*lip的帖子

所以，我这几天一直在观看和学习.net core。我已经构建了功能API（使用swagger）有一个我现在使用的控制器，它与我的问题相对应（怀疑它有问题，但要完整）：

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using BrambiShop.API.Data;
using BrambiShop.API.Models;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace BrambiShop.API.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class CategoriesController : ControllerBase
    {
        private BrambiContext _context;

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

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

        // GET: api/ItemVariants/5
        [HttpGet("{id}")]
        public async Task<Category> GetAsync(int id)
        {
            return await _context.Categories.FindAsync(id);
        }

        // POST-add: api/ItemVariants
        [HttpPost]
        public async Task<IActionResult> PostAsync([FromBody] Category item)
        { …