UseDestinationValue only when destination property is not null

Question

How to configure AutoMapper mapping when I want to use behaviour from UseDestinationValue method, but only when destination property is NOT null.

Answer 1

I think the NullSubstitute option would work for you. See: http://weblogs.asp.net/psteele/archive/2011/03/18/automapper-handling-null-members.aspx

EDIT

Looks like you might need to add a little conditional logic to your mapping for Details (and skip the UseDestinationValue option):

.ForMember(d => d.Details, 
    o => o.MapFrom(s => s.Details == null ? new ItemDetails() : Mapper.Map(s.Details))