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(); 

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

文章来源: Getting an export from an MEF container given only a Type instance