mapping example

gistfile1.txt

namespace ConsoleApplication1
{
public class Program
    {
        public class MappingProfile : Profile
        {
            public MappingProfile()
            {
                CreateMap<MainViewModel, MainEntity>()
                    .ForMember(dst => dst.SubEntities1, opt => opt.MapFrom(src => src.SubViewModels1))
                    .ForMember(dst => dst.SubEntities2, opt => opt.MapFrom(src => src.SubViewModels2))
                    .ReverseMap();
                CreateMap<SubViewModel1, SubEntity1>().ReverseMap();
                CreateMap<SubViewModel2, SubEntity2>().ReverseMap();
            }
        }

        class MainViewModel
        {
            public ICollection<SubViewModel1> SubViewModels1 { get; set; }
            public ICollection<SubViewModel2> SubViewModels2 { get; set; }
        }

        class SubViewModel1
        {
        }

        class SubViewModel2
        {
        }

        class MainEntity
        {
            public List<SubEntity1> SubEntities1 { get; set; }
            public List<SubEntity2> SubEntities2 { get; set; }
        }

        class SubEntity1
        {
        }

        class SubEntity2
        {
        }

        public static void Main(string[] args)
        {
            var clientConfiguration = new MapperConfiguration(
                cfg =>
                {
                    cfg.AddProfile(new MappingProfile());
                });

            var mapper = clientConfiguration.CreateMapper();

            var result = mapper.Map<MainEntity>(new MainViewModel
            {
                SubViewModels1 = new List<SubViewModel1> {new SubViewModel1()},
                SubViewModels2 = new List<SubViewModel2> {new SubViewModel2()}
            });
            Console.WriteLine($"Count: {result.SubEntities1.Count + result.SubEntities2.Count}");
            Console.ReadKey();
        }
  }
}