如何使用自动器跳过对象

Question

我有以下数据模型:

class TicketDM
{
 public int Id{get;set;}
 public List<NoteContractDM> Notes{get;set;}
}
class NoteContractDM
{
 public NoteDM Note{get;set;}
}
class NoteDM{
 public string Subject{get;set;}
 public string Description{get;set}
}

和以下ViewModels:

public class TicketVM
{
 public int Id {get;set;
 public List<NoteVM> Notes{get;set;}
}
public NoteVM
{
 public string Subject{get;set;}
 public string Description{get;set;}
} 

我想做一些自动映射，要做到这一点，我必须跳过noteContractDM。下面的代码显然行不通:

Mapper.CreateMap<TicketDM, TicketVM>()

我试过这样做:

Mapper.CreateMap<TicketDM, TicketVM>()
  .ForMember(vm => vm.Notes, conf => conf.MapFrom(dm => dm.Notes));  

但是它总是给我Missing type map configuration or unsupported mapping.异常

Answer 1

如果你想跳过对象，可以告诉Automapper忽略它们:

Mapper.CreateMap<TicketDM, TicketVM>()
.ForMember(vm => vm.Notes, conf => conf.Ignore());  

但是根据你给出的例子，你可能想要创建另一个地图，这样Notes也可以自动映射:

Mapper.CreateMap<TicketDM, TicketVM>()
.ForMember(vm => vm.Notes, conf => conf.MapFrom(dm => dm.Notes.Select(x => x.Note)));
Mapper.CreateMap<NoteDM, NoteVM>();

(示例使用System.Linq)