我如何将AutoMapper用于主要详细信息类

Question

我正在尝试映射ParentChild对象，但是Child未能映射。我已经配置了自动映射器以识别主类和详细类。

这里是我的班级和classDTO

public class Master {
    public int id {get;set;}
    public string masterInfo {get;set;}
    public ICollection<Detail> details { get; } = new Collection<Detail>();
}

public class Detail {
    public int id {get;set;}
    public int masterId {get;set;}
    public Master master {get;set;} 
    public string detailInfo {get;set;}
}

public class MasterDTO {
    public int id {get;set;}
    public string masterInfo {get;set;}
    public ICollection<DetailDTO> details { get; } = new Collection<DetailDTO>();
}

public class DetailDTO {
    public int id {get;set;}
    public int masterId {get;set;}
    public MasterDTO master {get;set;} 
    public string detailInfo {get;set;}
}

这是我的主程序：

    var config = new MapperConfiguration(cfg => {
                cfg.CreateMap<Master, MasterDTO>();
                cfg.CreateMap<Detail, DetailDTO>();
                });

    IMapper mapper = config.CreateMapper();

    var original1 = new Master { id=1,masterInfo="xxxx", 
        details = { new Detail {id = 11, masterId = 1, detailInfo="aaaa"}, 
                    new Detail {id = 12, masterId = 1, detailInfo="bbbb"}
        }};

    var update = mapper.Map<Master, MasterDTO>(original1);

和原始值为：

original1: {Test.Program.Master}
  details [Icollection]: Count = 2
   [0]: {Test.Program.Detail}
     detailInfo [string]: "aaaa"
     id [int] : 11
     master [Master] : null
     masterId [int] : 1
   [1]: {Test.Program.Detail}
     detailInfo [string]: "bbbb"
     id [int] : 12
     master [Master] : null
     masterId [int] : 1
  id [int] : 1
  masterInfo [string]: "xxxx"

和更新/结果值为：

update: {Test.Program.MasterDTO}
  details [Icollection]: Count = 0
  id [int] : 1
  masterInfo [string]: "xxxx"

需要您的建议。谢谢-Jigu

Answer 1

var config = new MapperConfiguration(cfg =>
{
    cfg.CreateMap<Master, MasterDTO>().ForMember(a => a.details, map => map.MapFrom(src => src.details));
    cfg.CreateMap<Detail, DetailDTO>();
});