Tôi đang làm việc trên một API Web với ASP.NET Core. Khi tôi thực thi API của mình với yêu cầu đăng, ngoại lệ sẽ được ném trước điểm ngắt của tôi trong phương thức Đăng của UnitController.System.InvalidOperationException: Không thể giải quyết dịch vụ cho loại
Exception
Request starting HTTP/1.1 POST http://localhost:5000/api/unit application/json 31 fail: Microsoft.AspNetCore.Server.Kestrel[13] Connection id "0HKVTL9A1LTD4": An unhandled exception was thrown by the application. System.InvalidOperationException: Unable to resolve service for type 'Project.DataAccess.Repository.UnitRepository' while attempting to activate 'Project.Service.UnitService'.
Context
namespace Project.DataAccess.Library.Interface {
public interface IBaseRepository<M> where M : class, IEntity
{
IEnumerable<M> SelectAll();
M SelectByID(int id);
void Insert(M obj);
void Update(M obj);
void Delete(int id);
void Save();
}
}
namespace Project.DataAccess.Library {
public abstract class BaseRepository<M> : IBaseRepository<M> where M : class, IEntity
{
protected ProjectContext Db { get; }
private DbSet<M> table = null;
protected DbSet<M> Table
{
get
{
return this.table;
}
}
public BaseRepository(ProjectContext dbContext)
{
Db = dbContext;
this.table = Db.Set<M>();
}
public void Delete(int id)
{
M existing = this.SelectByID(id);
if (existing != null)
this.table.Remove(existing);
}
// others methods
}
}
namespace Project.DataAccess.Repository
{
public class UnitRepository : BaseRepository<Unit>, IUnitRepository
{
public UnitRepository(Projectcontext) : base(context) { }
}
}
namespace Project.Service
{
public class UnitService : BaseService<Unit>, IUnitService
{
public UnitService(UnitRepository unitRepository) : base(unitRepository) { }
}
}
namespace AssoManager.Service.Library
{
public abstract class BaseService<M> : IBaseService<M> where M : class, IEntity
{
private IBaseRepository<M> _repository;
public BaseService(IBaseRepository<M> repository)
{
_repository = repository;
}
public IEnumerable<M> GetAll()
{
return this._repository.SelectAll();
}
}
}
namespace Project
{
public class Startup
{
public Startup(IHostingEnvironment env)
{
var builder = new ConfigurationBuilder()
.SetBasePath(env.ContentRootPath)
.AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
.AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
.AddEnvironmentVariables();
Configuration = builder.Build();
}
public IConfigurationRoot Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
services.AddMvc();
this.DataAccessMySqlConfiguration(services);
this.ConfigureRepository(services);
this.ConfigureServicesUnit(services);
this.ConfigureServicesUser(services);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole(Configuration.GetSection("Logging"));
loggerFactory.AddDebug();
app.UseMvc();
}
#region Database configuration
public void DataAccessMySqlConfiguration(IServiceCollection services)
{
services.AddDbContext<ProjectContext>(options => options.UseMySQL(Configuration.GetConnectionString("MsSQLConnection")));
}
#endregion
#region DataAccess configuration
public void ConfigureRepository(IServiceCollection services)
{
services.AddScoped<IUnitRepository, UnitRepository>();
services.AddScoped<IUserRepository, UserRepository>();
}
#endregion
#region Services configuration
/// <summary>
/// Is used to add unit services to the container
/// </summary>
public void ConfigureServicesUnit(IServiceCollection services)
{
services.AddTransient<IUnitService, UnitService>();
services.AddTransient<IMeetingService, MeetingService>();
}
/// <summary>
/// Is used to add user services to the container
/// </summary>
public void ConfigureServicesUser(IServiceCollection services)
{
services.AddTransient<IUserService, UserService>();
}
#endregion Services configuration
}
}
namespace Project.Controllers
{
[Route("api/[controller]")]
public class UnitController : Controller
{
private IUnitService UnitService;
public UnitController(IUnitService unitService)
{
UnitService = unitService;
}
// GET api/units
[HttpGet]
public IEnumerable<Unit> Get()
{
return UnitService.GetAll();
}
// GET api/unit/5
[HttpGet("{id}")]
public IActionResult Get(int id)
{
Unit unit;
//->Check
if (id < 1)
return BadRequest();
//->Processing
unit = UnitService.GetByID(id);
if (unit == null)
return NotFound();
return new ObjectResult(unit);
}
// POST api/unit
[HttpPost]
public IActionResult Post([FromBody]Unit unit)
{
//->Check
if (unit == null)
return BadRequest();
//->Processing
UnitService.Create(unit);
return CreatedAtRoute("Get", new { id = unit.Id }, unit);
}
// PUT api/unit/5
[HttpPut("{id}")]
public void Put(int id, [FromBody]string value)
{
}
// DELETE api/unit/5
[HttpDelete("{id}")]
public void Delete(int id)
{
}
}
}
Version
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.0",
"type": "platform"
},
"Microsoft.AspNetCore.Mvc": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.0",
"Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
"Microsoft.Extensions.Configuration.FileExtensions": "1.0.0",
"Microsoft.Extensions.Configuration.Json": "1.0.0",
"Microsoft.Extensions.Logging": "1.0.0",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.Extensions.Logging.Debug": "1.0.0",
"Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0",
"Microsoft.EntityFrameworkCore": "1.0.0",
"MySql.Data.Core": "7.0.4-IR-191",
"MySql.Data.EntityFrameworkCore": "7.0.4-IR-191",
"IdentityServer4": "1.0.0-rc2",
"AssoManager.Domain": "1.0.0-*",
"AssoManager.Service": "1.0.0-*",
"AssoManager.DataAccess": "1.0.0-*"
},
Câu hỏi
Tôi nghĩ rằng vấn đề có thể là do sự kế thừa giữa BaseRepository và IBaseRepository. Nhưng tôi không hiểu nơi nào có thể là sai lầm của tôi. Làm cách nào để sửa lỗi này?
Cảm ơn bạn đã giúp bạn :),
Bản sao có thể có của [Lỗi lõi phụ thuộc ASP.NET: Không thể giải quyết dịch vụ cho loại khi cố gắng kích hoạt] (https://stackoverflow.com/questions/40900414/asp-net-core-dependency-injection-error -unable-to-resolve-service-for-type-whil) –