Question

I have an interface and a class defined as below

public interface IShape
{

}

public class Square : IShape
{

}

I know I can configure this for dependency injection in Structure Map as below.

ObjectFactory.Initialize(x =>
{
   x.For<IShape>().Use<Square>().Named("Square");

}
);

However, I am wondering how I could configure the structure map if I can only know the Concrete Type during runtime. For example, I would like to do as below.;

ObjectFactory.Initialize(x =>
{
   x.For<IShape>().Use<Typeof(Square)>().Named("Square");

}
);

EDIT: A new shape object (i.e. circle) would be plugged in using an additional DLL. Hence the design should be able handle this situation as well.

Any advice would be much appreciated.

Thanks

Answer 1

This works for me.

public class ShapeHolder
{
   public IShape shape{ get; set ;}
   public string shapeName { get; set; }
}

//Run time shape creation
ShapeHolder shapeholder = factory.CreateShape();
ObjectFactory.Initialize(x =>
{
   x.For(typeof(IShape)).Use(shapeholder.shape).Named(shapeholder.shapeName);
} );