Adding an instance to a MEF container

问题

How can you add an already created instance to a MEF container/cataloge to use when resolving Imports. I want the functionality that Unity gives with the RegisterInstance method on its containers.

回答1:

You can use the ComposeExportedValue function for this, like so:

var container = new CompositionContainer();
container.ComposeExportedValue<Application>("Application", Application.Current);

来源：https://stackoverflow.com/questions/5191316/adding-an-instance-to-a-mef-container