CODEWITHSUNDEEP
c#unity-container
rosh_021
rosh_021

Reputation: 23

Exception is: InvalidOperationException - The current type, log4net.ILog, is an interface and cannot be constructed. Are you missing a type mapping?

I am using unity-container.I have register my class to IOC container. When i am trying to create instance of Auth class, I am getting following exception: Exception is: InvalidOperationException - The current type, log4net.ILog, is an interface and cannot be constructed. Are you missing a type mapping?

Please let me know if i am doing something wrong?

My code:

    using Unity;
    Public Main()
    {
     private readonly IUnityContainer container;
     public override void Instantiate()
     {
       container.RegisterSingleton<IAuthentication, Auth>("Auth");
     }

     public Authenticate()
     {
       var instance = container.Resolve<IAuthentication>("Auth");**//Getting exception here**
     }
    }

Auth class:

    public class Auth: IAuthentication
    {
      private readonly ILog log;
      private IImpID impIDobj;
      public Auth(ILog log, IImpID impIDobj)
        {
            this.impIDobj= impIDobj;
            this.log = log;
        }

        public Auth()
            : this(LogManager.GetLogger("Auth"), new CAuth())
        {
        }
        public Authenticate()
        {
          impIDobj.Authenticate(data);
         //Some logics
        }
    }

Upvotes: 0

Views: 1007

Answers (2)

rosh_021
rosh_021

Reputation: 23

Thanks all of you for feedback. But i am able to solve this issue with "InjectionConstructor". More info is here.

My new Auth class:

 public class Auth: IAuthentication
{
  private readonly ILog log;
  private IImpID impIDobj;
  public Auth(ILog log, IImpID impIDobj)
    {
        this.impIDobj= impIDobj;
        this.log = log;
    }

    [InjectionConstructor]
    public Auth()
        : this(LogManager.GetLogger("Auth"), new CAuth())
    {
    }
    public Authenticate()
    {
      impIDobj.Authenticate(data);
     //Some logics
    }
}

Upvotes: 0

Mauri
Mauri

Reputation: 247

The Container doesnt know what is the type for ILog, and cant create an instance of Auth. Please provide the Type for ILog, add this line on your Instantiate method.

container.RegisterSingleton<ILog, yourOwnLogType>();

Upvotes: 1

Related Questions