Unity Container unable to resolve a type RSS

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  sillysoumare

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  17 Points

  61 Posts

  Unity Container unable to resolve a type

  Jun 09, 2011 04:20 AM|LINK

   IUnityContainer _unityContainer = new UnityContainer();     

   _unityContainer.RegisterType(typeof(ICustomerService), typeof(CustomerService), new TransientLifetimeManager());

   _unityContainer.RegisterType(typeof(IRepository<Customer>), typeof(Repository<Customer>));

  Then I use it like this in a class

   ICustomerService _customertService = _unityContainer.Resolve<ICustomerService>();

  Here are my CustomerService Class and Interface

      public interface ICustomerService
      {
          void AddCustomer(Customers customer);
      }
  
      public class CustomerService : ICustomerService
      {
        
          IRepository<Customers> _customerRepository;
  
  
          public CustomerService(IRepository<Customers> customerRepository)
          {
              if (customerRepository == null)
                  throw new ArgumentNullException("customerRepository");
  
              _customerRepository = customerRepository;
          }
  
          public void AddCustomer(Customers customer)
          {
              IUnitOfWork unitOfWork = _customerRepository.UnitOfWork as IUnitOfWork;
  
              _customerRepository.InsertOnSubmit(customer);
  
              //Complete changes in this unit of work
              unitOfWork.SubmitChanges();
          }
  
      }

  The Unity container shows all the registered types and their mappings but I get an Error Message:

   The current type, ICustomerService, is an interface and cannot be constructed. Are you missing a type mapping?

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  nvanhaaster@...

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  1484 Posts

  Re: Unity Container unable to resolve a type

  Jun 09, 2011 05:28 AM|LINK

  Hello sillsoumare,

  I just started producing a video on the Unity containers. However i typically register my types with the following syntax.

  _unityContainer.RegisterType<ICustomerService, CustomerService>) new TransientLifetimeManager());

  This should fix the problem, however the TransientLifeTimeManager doesnt really do anything but ensure a new object is created every time. 

  Hope this helps.

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  sillysoumare

  Member

  17 Points

  61 Posts

  Re: Unity Container unable to resolve a type

  Jun 09, 2011 12:08 PM|LINK

  So are you telling me there is a difference in the way you register the types?  
  
  _unityContainer.RegisterType<ICustomerService, CustomerService>) new TransientLifetimeManager());

  
  should be the same as 

  _unityContainer.RegisterType(typeof(ICustomerService), typeof(CustomerService), new TransientLifetimeManager());

  The reason why I'm doing it this way, is because I have created a method that does the autoregistration and I should be able to do it with the _unityContainer.RegisterType(typeof(ICustomerService), typeof(CustomerService), new TransientLifetimeManager());

  My problem is why does the container shows all my registered types, but I cannot resolve them?

  Please help me.