CODEWITHSUNDEEP
c#.netc#-4.0mef
GreyCloud
GreyCloud

Reputation: 3100

Mef import all types implementing an interface specified at runtime

Can i write a class to use mef to import all types implementing a specific interface and then specify this interface at run time. (i know i need to tag the implementors with export)

Example usage:

IEnumerable<IExcitingClass> excitingClasses = ClassImporter<IExcitingInterface>.ImportAllFrom(specifyDirectory);

Is this possible?

Upvotes: 3

Views: 1749

Answers (2)

Juri Naidenov
Juri Naidenov

Reputation: 1885

At run time you could only use string to specify your interface.

    public IEnumerable<object> GetAllInheritors(string interfaceName)
    {
        Assembly assembly = this.GetType().Assembly;
        foreach (var part in Container.Catalog.Parts)
        {
            Type type = assembly.GetType(part.ToString());
            if (type != null)
                if (type.GetInterface(interfaceName) != null)
                {
                    yield return part.CreatePart().GetExportedValue(part.ExportDefinitions.First());
                }
        }
    }

Upvotes: 1

Daniel Plaisted
Daniel Plaisted

Reputation: 16744

You can create a container using a DirectoryCatalog, and call container.GetExportedValues<IExcitingClass>. Is that what you want?

Upvotes: 1

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