下面给出了我不同的类声明以及我如何设置统一容器配置以获得Interface to Concrete类实现 . 代码当前抛出stackoverflow异常或建议无法构造接口 .
请帮我修复类结构或容器配置 .
CodesController Class -
public class CodesController : ApiController
{
private readonly IUnitOfWorkAsync unitOfWork;
private readonly ICodeRepository repository;
public CodesController(IUnitOfWorkAsync unitOfWork, ICodeRepository codeRepository)
{
if (unitOfWork == null)
{
throw new ArgumentNullException("unitOfWork");
}
this.unitOfWork = unitOfWork;
this.repository = codeRepository;
}
//Other class level methods here
}
CodeRepository class -
public class CodeRepository : ICodeRepository
{
private readonly ICodeRepository codeRepository;
public CodeRepository(ICodeRepository repository)
{
this.codeRepository = repository;
}
public virtual async Task<IEnumerable<Code>> GetCodeAsync(string codeKey)
{ //Some implementation here}
}
ICodeRepository Interface -
public interface ICodeRepository : IRepositoryAsync<Code>
{
Task<IEnumerable<Code>> GetCodeAsync(string codeKey);
}
IRepositoryAsync Interface -
`public interface IRepositoryAsync<TEntity> : IRepository<TEntity> where TEntity : class, IPersistenceHint
{
Task<bool> DeleteAsync(params object[] keyValues);
Task<bool> DeleteAsync(CancellationToken cancellationToken, params object[] keyValues);
Task<TEntity> FindAsync(params object[] keyValues);
Task<TEntity> FindAsync(CancellationToken cancellationToken, params object[] keyValues);
}
Unity Container Configuration- container.RegisterType<IUnitOfWorkAsync, UnitOfWork>(
"test",
new TransientLifetimeManager(),
new InjectionConstructor(container.Resolve<IDataContextAsync>("test")));
container.RegisterType<ICodeRepository, CodeRepository>();
container.RegisterType<CodesController, CodesController>();
With this given configuration and class structure, based on my experimentation with container config, I get following exception -`
JSON
exceptionMessage=An error occurred when trying to create a controller of type 'CodesController'. Make sure that the controller has a parameterless public constructor.
exceptionType=System.InvalidOperationException
innerException
exceptionMessage=Type '<Namespace>.Api.Controllers.CodesController' does not have a default constructor
stackTrace= at System.Linq.Expressions.Expression.New(Type type)
at System.Web.Http.Internal.TypeActivator.Create[TBase](Type instanceType)at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.GetInstanceOrActivator(HttpRequestMessage request, Type controllerType, Func`1& activator)
at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType)
如果这里有任何问题,请提出建议,以便我可以解决同样的问题 . 已经在这方面挣扎了很多天 .
1 回答
您正在向
CodeRepository
注入ICodeRepository
,这可能会导致stackoverflow异常,因为它将继续生成ICodeRepositories
. 它将生成递归调用 . 有点像这样:关于"does not have a default constructor" -exception,您是否为Web API注册了
DependencyResolver
?有关如何执行此操作的更多详细信息,请参阅其中一个问题:Using Unity with Web Api 2 gives error does not have a default constructor
Unity.WebApi | Make sure that the controller has a parameterless public constructor
ASP.Net MVC 4 Web API controller dosn't work with Unity.WebApi
作为旁注,您不必在团结登记中注册
CodesController
.