问题
In the project I'm working on I have a StructureMap registry for the main web project and another registry for my integration tests. During some of the tests I wire up the web project's registry, so that I can get objects out of the container for testing.
In one case I want to be able to replace a default concrete type from the web registry with one in the test registry.
Is this possible?
How do you do it?
回答1:
In a similar situation I created a NestedContainer (Container.GetNestedContainer()) and overwrote the type there. I then use the nested container to resolve the type.
That keeps the original configuration intact but allows for such overriding.
回答2:
Yes you can, the container will serve up which ever type is last defined (according to my tests). I theorize (but I am unsure) that my mistake was that I called the IInitializationExpression.Scan mechanism after I registered some type and it got reregistered back to it's original setting.
回答3:
Have you tried the .With() when you use GetInstance()?
Otherwise, you also use Container.Inject().
来源：https://stackoverflow.com/questions/2805938/using-structuremap-when-a-default-concrete-type-is-defined-in-one-registry-can