CODEWITHSUNDEEP
c#unity-containerioc-container
resp78
resp78

Reputation: 1534

Is it possible to resolve named and unnamed unity registration to same instance (ContainerControlled)

We know that named registration is resolved using arrays in constructor injection

// framework code
var injectionMembers = new InjectionConstructor();
...
container.RegisterType(typeof(Employee), "emp1", 
          new ContainerControlledLifetimeManager(), injectionMembers); 

container.RegisterType(typeof(Employee), "emp2", 
          new ContainerControlledLifetimeManager(), injectionMembers2); 
....

// user code
public class Manager
{
    public Manager(Employee[] employee)
    {
        ...
    }
}

I am looking to support following, when user knows that their is only one named registration.

public class Manager
{
    public Manager(Employee employee)
    {
        ...
    }
}

And to achieve this I thought if there is some way that I can do two registrations, one with name and one without name in the framework code, that could solve the problem.

I can off course do two registrations but both registrations when resolved would give different instances. Is there a way that I can do two registrations, one named and one named which when resolved return the same instance.

Thanks

Upvotes: 2

Views: 751

Answers (1)

Roland Buergi
Roland Buergi

Reputation: 1199

Depending on what you want to achieve and if it is possible to instantiate the object at this point, you can just register the instance directly:

container.RegisterType<MyType>("name1", ...);
container.RegisterInstance<MyType>("name2", container.Resolve<MyType>("name1"));

This guarantees that the same instance is registered under both names.

Upvotes: 2

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