CreateMapSaveMaterialDto MaterialIgnorex = xIdForAllMembersopt = optConditionsrc dest sreMember dMember = sreMember != null;判断值类型为NULL映射为NULL

CreateMap<SaveMaterialDto, Material>() .ForMember(dest => dest.Id, opt => opt.Ignore()) .ForAllMembers(opt => opt.Condition((src, dest, srcMember, destMember) => srcMember != null && srcMember.GetType().IsValueType ? srcMember != Activator.CreateInstance(srcMember.GetType()) : srcMember != null ));