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  • David Peck 678 posts 1843 karma points c-trib
    May 09, 2015 @ 16:50
    David Peck

    Mapping delegate created from a generic type definition, doesn't work

    This is probably a little bit niche, and could just be my code rather than this awesome project, but I've found that if my mapping delegate returns a generic property then it doesn't work. E.g.

    public interface IMapClass{
            CustomMapping GetCustomMapping();
    public class GenericTypeDefClass<T> : IMapClass where T is class, new(){
        public CustomMapping GetCustomMapping()
                return MapProperty;
            public static T MapProperty(IUmbracoMapper mapper, IPublishedContent contentToMapFrom, string propertyName, bool recursive)
                return contentToMapFrom.GetPropertyValue<T>(propertyName, recursive, null);
    //Create a type for GenericTypeDefClass<string>
    Type newType = typeof(GenericTypeDefClass<T>).MakeGenericType(typeof(string));
    //Create an instance of GenericTypeDefClass<string>
    IMapClass c = (IMapClass)Activator.CreateInstance(type);
    //Get the delegate
    var mappingDelegate = c.GetCustomMapping();
    //arguments are typeof(string).FullName and the MapProperty delegate where T is string
    Mapper.AddCustomMapping(mappingDelegate.Method.ReturnType.FullName, mappingDelegate);

    I can imagine this isn't a problem that many people are coming across, but perhaps you can identify if there is a way around this issue?

    Of course, this is actually a moot point if my other post has a solution... 

  • Andy Butland 416 posts 2324 karma points MVP 4x hq c-trib
    May 10, 2015 @ 13:03
    Andy Butland

    See how my suggestions go on the other post.  Hopefully they are easier ways built in - that might need an extra step, but simpler ones.  As if I'm honest, this approach with generics and reflection is getting a bit outside my comfort zone!

  • David Peck 678 posts 1843 karma points c-trib
    May 11, 2015 @ 15:10
    David Peck

    No problem. Thanks for all your work in the project.

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