I need a generic way to process Audit Logging in my App using EF 6

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generics

entity-framework

Hi,

I have a large application using EF 6 and need a way to process calls to SaveChanges() in a generic fashion. I have Googled this repeatedly and found only outdated materials. I have a partial class setup that intercepts the SaveChanges call just fine. The current error I am receiving occurs here:

public static string[] GetKeyNames<T>(DbContext context) where T : class
   {
       Type t = typeof(T);
       ObjectContext objectContext = ((IObjectContextAdapter)context).ObjectContext;
       MethodInfo method = typeof (ObjectContext).GetMethod("CreateObjectSet",
                 Type.EmptyTypes).MakeGenericMethod(t);

      ->  dynamic objectSet = method.Invoke(objectContext, null);

       IEnumerable<dynamic> keyMembers = objectSet.EntitySet.ElementType.KeyMembers;

       string[] keyNames = keyMembers.Select(k => (string)k.Name).ToArray();
       return keyNames;
   }

The method.Invoke is causing "Mapping and metadata information could not be found for EntityType 'System.Data.Entity.DbContext'.".

I tried Googling the error and found nothing that applied to EF 6.1.1. I've been fighting with this for 3 days now. Any help would be appreciated. Does anyone have a complete example using generics and reflection to override the SaveChanges method?

Thanks,

Bill