如何将AutoMapper用于主细节类

Question

我正在字符串映射ParentChild对象，但Child未能映射。我已经将自动映射器配置为识别master和detail类。

这是我的班级和班级DTO

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;}
}

这是我的主要程序：

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);

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"

更新/结果值为：

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

需要你的建议。谢谢-Jigu

Answer 1

您应该使用类似这样的ForMember方法来映射子属性

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