我已经搜索了很长时间,但没有找到任何帮助。我哪里错了?我真的不知道该怎么办。我在下面写了所有细节。我已经尝试过,但没有成功。
尝试创建类型为“TypeNewsController”的控制器时发生错误。确保控制器有一个无参数的公共构造函数。
public class MvcApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
WebApiConfig.Register(GlobalConfiguration.Configuration);
AreaRegistration.RegisterAllAreas();
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
Bootstrapper.Run();
}
}
我的 api 控制器:
public class TypeNewsController : ApiController
{
private readonly ITypeNewsService _typeNewsService;
public TypeNewsController(ITypeNewsService typeNewsService)
{
_typeNewsService = typeNewsService;
}
[HttpGet]
public TypeNewsResponse Get([ModelBinder] PageRequest model)
{
model = model ?? new PageRequest();
var output = _typeNewsService.GetTypeNewss().ToList();
return new TypeNewsResponse
{
Page = model.PageIndex,
Records = model.PageSize,
Rows = output.ToList(),
Total = output.Count() / model.PageSize,
};
}
}
错误 :
<Error>
<Message>An error has occurred.</Message>
<ExceptionMessage>
An error occurred when trying to create a controller of type 'TypeNewsController'. Make sure that the controller has a parameterless public constructor.
</ExceptionMessage>
<ExceptionType>System.InvalidOperationException</ExceptionType>
<StackTrace>
at System.Web.Http.Dispatcher.DefaultHttpControllerActivator.Create(HttpRequestMessage request, HttpControllerDescriptor controllerDescriptor, Type controllerType) at System.Web.Http.Controllers.HttpControllerDescriptor.CreateController(HttpRequestMessage request) at System.Web.Http.Dispatcher.HttpControllerDispatcher.SendAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken) at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__0.MoveNext()
</StackTrace>
<InnerException>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Type 'JuventusNewsSiteApk.Controllers.TypeNewsController' does not have a default constructor
</ExceptionMessage>
<ExceptionType>System.ArgumentException</ExceptionType>
<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)
</StackTrace>
</InnerException>
</Error>
引导程序类:
public static class Bootstrapper
{
public static void Run()
{
SetAutofacContainer();
//Configure AutoMapper
AutoMapperConfiguration.Configure();
}
private static void SetAutofacContainer()
{
var builder = new ContainerBuilder();
builder.RegisterControllers(Assembly.GetExecutingAssembly());
builder.RegisterApiControllers(Assembly.GetExecutingAssembly());
builder.RegisterType<UnitOfWork>().As<IUnitOfWork>().InstancePerRequest();
builder.RegisterType<DatabaseFactory>().As<IDatabaseFactory>().InstancePerRequest();
builder.RegisterAssemblyTypes(typeof(NewsRepository).Assembly)
.Where(t => t.Name.EndsWith("Repository"))
.AsImplementedInterfaces().InstancePerRequest();
builder.RegisterAssemblyTypes(typeof(NewsService).Assembly)
.Where(t => t.Name.EndsWith("Service"))
.AsImplementedInterfaces().InstancePerRequest();
builder.RegisterAssemblyTypes(typeof(DefaultFormsAuthentication).Assembly)
.Where(t => t.Name.EndsWith("Authentication"))
.AsImplementedInterfaces().InstancePerRequest();
builder.Register(
c => new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(new JuventusNewsApkEntities())))
.As<UserManager<ApplicationUser>>().InstancePerRequest();
builder.RegisterFilterProvider();
IContainer container = builder.Build();
DependencyResolver.SetResolver(new AutofacDependencyResolver(container));
}
}
更新 :
public class TypeNewsService : ITypeNewsService
{
private readonly ITypeNewsRepository _typeNewsRepository;
private readonly IUnitOfWork _unitOfWork;
public TypeNewsService(ITypeNewsRepository typeNewsRepository,
IUnitOfWork unitOfWork)
{
_typeNewsRepository = typeNewsRepository;
_unitOfWork = unitOfWork;
}
#region ITypeNewsService Member
public void AddTypeNews(TypeNews typeNews)
{
_typeNewsRepository.Add(typeNews);
SaveTypeNews();
}
public void DeleteTypeNews(int id)
{
_typeNewsRepository.DeleteById(id);
SaveTypeNews();
}
public IEnumerable<TypeNews> GetTypeNewss()
{
var output = _typeNewsRepository.GetAll();
return output;
}
public void SaveTypeNews()
{
_unitOfWork.Commit();
}
#endregion
}
public interface ITypeNewsService
{
void AddTypeNews(TypeNews typeNews);
void DeleteTypeNews(int id);
IEnumerable<TypeNews> GetTypeNewss();
void SaveTypeNews();
}