Question

我正在尝试对存储库控制器'PeoppleRepositoryController.cs进行测试。我收到以下错误，我无法弄清楚它到底在抱怨什么。谁能解释一下解决此问题所需采取的措施？

Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService（IServiceProvider sp，Type type，type requiredBy，bool isDefaultParameterRequired）

完整的堆栈跟踪可以在下图看到：

控制器为：

function toggle(id) {
    var div1 = document.getElementById(id);
    if(div1.hidden) {
        div1.hidden = false;
    } else {
        div1.hidden = true;
    }
}

IUnitOfWork文件：

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 Personkartotek.DAL;
using Personkartotek.Models;
using Personkartotek.Persistence;


namespace Personkartotek.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class PeopleRepositoryController : ControllerBase
    {
        private readonly IUnitOfWork _uoWork;

        public PeopleRepositoryController(IUnitOfWork uoWork)
        {
            _uoWork = uoWork;
        }

        // GET: api/PeopleRepository
        [HttpGet]
        public IEnumerable<Person> GetPersons()
        {
            return _uoWork._People.GetAll();
        }

        // GET: api/PeopleRepository/5
        [HttpGet("{id}")]
        public async Task<IActionResult> GetPerson([FromRoute] int id)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var person = _uoWork._People.Get(id);

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

            return Ok(person);
        }

        //GET: api/PeopleRepository/
        [HttpGet("AtAdr/{id}")]
        public IActionResult GetPersonsResidingAtAddress([FromRoute] int AddressId)
        {
            var ResidingPersons = _uoWork._People.GetAllPersonsById(AddressId);

            return Ok(ResidingPersons);
        }

        // PUT: api/PeopleRepository/5
        [HttpPut("{id}")]
        public async Task<IActionResult> PutPerson([FromRoute] int id, [FromBody] Person person)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != person.PersonId)
            {
                return BadRequest();
            }

            if (!PersonExists(id))
            {
                return NotFound();
            }

            _uoWork._People.Put(person);

            return NoContent();
        }

        // POST: api/PeopleRepository
        [HttpPost]
        public async Task<IActionResult> PostPerson([FromBody] Person person)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            _uoWork._People.Add(person);
            _uoWork.Complete();

            return CreatedAtAction("GetPerson", new { id = person.PersonId }, person);
        }

        // DELETE: api/PeopleRepository/5
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeletePerson([FromRoute] int id)
        {
            if (!ModelState.IsValid) {
                return BadRequest(ModelState);
            }

            var person =  _uoWork._People.Get(id);
            if (person == null) {
                return NotFound();
            }

            _uoWork._People.Remove(person);
            _uoWork.Complete();

            return Ok(person);
        }

        private bool PersonExists(int id)
        {
            return _uoWork.Exist(id);
        }
    }
}

我的Startup.cs文件设置：

using Personkartotek.DAL.IRepositories;

namespace Personkartotek.DAL
{
    public interface IUnitOfWork : IDisposable
    {
        IPeopleRepository _People { get; }

        int Complete();

        bool Exist(int id);
    }
}

Answer 1

它抱怨是因为它不知道如何创建IUnitOfWork对象，该对象依赖于您的控制器。

因此，要解决此问题，您需要指示框架您要使用IUnitOfWork的哪种实现。通常，您是在Startup.ConfigureServices方法中执行此操作的。例如：

public class Startup
{
   public void ConfigureServices(IServiceCollection services)
   {
      services.AddTransient<IUnitOfWork, UnitOfWorkImplementation>();
   } 
}

UnitOfWorkImplementation是实现IUnitOfWork

的类

在RepositoryController Asp.Net Core上运行测试时，此错误在抱怨什么？

1 个答案: