Unity container resolve with partial classes

Question

I am facing an issue when I use Unity to inject a dependency with two partial classes. This is what I have done:

public partial class MyDbContext : IMyDbContext
{
    // code
}

public partial class MyDbContext : IMyDbContext
{
     // code
}

public interface IMyDbContext
{
    // code
}

var container = new UnityContainer();
container.RegisterType<IMyDbContext,      
MyDbContext>(new HierarchicalLifetimeManager());
config.DependencyResolver = new UnityResolver(container);

Using the above code, I get an exception about my db is null. But, If I remove one partial class, so I will have only one partial class, all works fine. I would very appreacite if you could you please on this.

EDIT: When I in debug mode, the Unit container GetService method catches an exception ResolutionFailedException.

Doro · Accepted Answer · 2016-07-02 07:17:39Z

1

I solved this issue by registering the instance and not the type. However, any other solutions are welcome.

var container = new UnityContainer();
MyDbContext context = new MyDbContext()
container.RegisterInstance<IMyDbContext>(context);
config.DependencyResolver = new UnityResolver(container);

answered Jul 2, 2016 at 7:17

Doro

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Comments

ManOVision · Accepted Answer · 2016-07-02 02:10:06Z

0

Remove one of the interfaces. One of the partial classes implements it so the other one can't. Remember that the partial class is compiled together in a single class so you can't have both partials implement the same interface because once combined, it is unknown which partial is actually implementing it.

answered Jul 2, 2016 at 2:10

ManOVision

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1 Comment

Doro Over a year ago

Thank you for the response. If you mean to remove the interface from one partial class I already try it but still doesn't work.

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