与OP进行了一些讨论之后，事实证明，他的主要需求是快速将源对象内部的子对象/嵌套对象映射到扁平化的目标对象.他不想为目的地的每个属性编写一个映射.

After some discussion with OP, it turns out his main need is to quickly map a child/nested object inside the source object to the flattened destination object. He does not want to write a mapping for every property of the destination.

这是实现此目标的一种方法:

Here is a way to achieve this:

• 定义用于展平Product成员的映射Product-> ProductViewModel
• 定义映射Category到CategoryViewModel

• 定义用于映射类别的映射ProductWithCategories-> ProductViewModel，然后在后映射中映射Product:

• Define a mapping Product -> ProductViewModel used to flatten the members of Product
• Define a mapping Category to CategoryViewModel

• Define a mapping ProductWithCategories -> ProductViewModel that maps the categories, and then in the aftermap, map the Product:

config.CreateMap<ProductWithCategories, ProductViewModel>() .ForMember(q => q.Id, option => option.Ignore()) // flattened in AfterMap .ForMember(q => q.Categories, option => option.MapFrom(q => q.Categories)) .AfterMap((src, dst) => Mapper.Map(src.Product, dst));

config.CreateMap<ProductWithCategories, ProductViewModel>() .ForMember(q => q.Id, option => option.Ignore()) // flattened in AfterMap .ForMember(q => q.Categories, option => option.MapFrom(q => q.Categories)) .AfterMap((src, dst) => Mapper.Map(src.Product, dst));