c# - Automapper 基类映射

Question

对于 AutoMapper，我实现了以下有效的方法，但重复了映射代码:

cfg.CreateMap<RmsOelEntryUnlinkedPersonInputDto, AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedPersonUnlinked>()
    .ForMember(dest => dest.DateOfBirth, opts => opts.MapFrom(src => FormatDateType(src.DateOfBirth)))
    .ForMember(dest => dest.EffectiveFromTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveFromTime)))
    .ForMember(dest => dest.EffectiveToTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveToTime)));

cfg.CreateMap<RmsOelEntryUnlinkedAddressInputDto, AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedAddressUnlinked>()
    .ForMember(dest => dest.EffectiveFromTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveFromTime)))
    .ForMember(dest => dest.EffectiveToTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveToTime)));

RmsOelEntryUnlinkedPersonInputDto 和 RmsOelEntryUnlinkedAddressInputDto 都是从 RmsOelEntryInvolvedEntityBaseDto 继承的，这个基类具有属性 EffectiveFromTime 和 >有效时间。

我不希望必须重复映射 EffectiveFromTime 和 EffectiveToTime，如上所示。

但是，AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedPersonUnlinked 和 AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedAddressUnlinked 是自动生成的，没有基类。因此，我看不到如何使用 AutoMapper 的“包含”映射选项。

如何优化它以删除重复的映射？

Answer 1

我遇到了类似的情况，并求助于辅助扩展方法。我为您定制了:

internal static class CommonMapperExtensions
{
     internal static IMappingExpression<TSource, TDestination> MapCommonFields<TSource, TDestination>(this IMappingExpression<TSource, TDestination> m)
         where TSource : RmsOelEntryInvolvedEntityBaseDto
         where TDestination : IEffective
     {
         return m
            .ForMember(dest => dest.EffectiveFromTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveFromTime)))
            .ForMember(dest => dest.EffectiveToTime, opts => opts.MapFrom(src => FormatDateTimeType(src.EffectiveToTime)));                
     }
}

然后配置看起来像这样:

cfg.CreateMap<RmsOelEntryUnlinkedPersonInputDto, AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedPersonUnlinked>()
    .MapCommonFields()
    .ForMember(dest => dest.DateOfBirth, opts => opts.MapFrom(src => FormatDateType(src.DateOfBirth)));

cfg.CreateMap<RmsOelEntryUnlinkedAddressInputDto, AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedAddressUnlinked>()
    .MapCommonFields();

如果 AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedAddressUnlinked 和 AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedPersonUnlinked 是自动生成的，我会假设它们是部分的。

然后你可以为这些类创建通用接口(interface):

public interface IEffective 
{
     DateTime EffectiveFromTime {get; set;}
     DateTime EffectiveToTime {get; set;}
}

public partial AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedAddressUnlinked
    : IEffective { }

public partial AddNewOELEntryInvolvedEntitiesUnlinkedInvolvedPersonUnlinked
    : IEffective { }