we are currently using EF 4.1 and are thinking about a new alternative for our object model which is terrible. We do have POCOs in a sort of BL-Layer and above a GUI-Model with Objects wrapping the POCOs to offer BindingLists to the UI instead of the BL’s IEnumerables.
We thought about deriving the UI-Model from the POCOs but I have no Idea how this would work with the EF instantiating the objects as it shouldn’t know anything about the UI objects. Is there some way to move the instantiating process to factories or does anyone have an idea how to promote the object afterwards from base to derived type (which isn’t really a good idea at all, is it?)
Any help, suggestions or comments would be highly appreciated.
Best regards
Gope
No it is not possible to move object instantiation to factories. Because of that deriving custom classes from your entities will not work because EF will not create those instances for you and you will also not be able to persist those instances because EF will not know how to map them.