Getting an export from an MEF container given only a Type instance

问题

I have a scenario where I have to get an export from my CompositionContainer instance but I only have a Type to work with; I don't know the type at compile time, hence I can't retrieve the exported object in the normal generic way.

Normally you would do this:

_container.GetExportedObject<IMyType>();

But in my case, I have this:

Type someType = ... ;
_container.HowDoIGetTheExport(someType);

Any ideas?

回答1:

Found the answer:

var export = _container.GetExports(someType, null, null).FirstOrDefault();

回答2:

Create the call dynamically using Type.MakeGeneric.....

http://geekswithblogs.net/marcel/archive/2007/03/24/109722.aspx

来源：https://stackoverflow.com/questions/1037795/getting-an-export-from-an-mef-container-given-only-a-type-instance