自动映射器-使用集合映射对象 [英] Auto mapper - Mapping objects with collections

问题描述

使用自动映射器，我需要映射以下类的对象

using Auto Mapper, I need to Map objects of following classes

public class RemoteClass
{
    public IEnumerable<RemoteDetails> collection{get; set;};

    public int RemoteFieldA{get; set;}

    public int RemoteFieldB{get; set;}      
}


public class LocalClass
{
    public IEnumerable<LocalDetails> collection{get; set;};

    public int LocalFieldA{get; set;}

    public int LocalFieldB{get; set;}       
}

对此我应该如何配置和映射?

What should be my configration and mapping for this ?

推荐答案

只需定义 RemoteDetails 和 LocalDetails 之间的映射.AutoMapper非常聪明，可以处理他知道如何映射的类型集合.假设这两个类具有字段C:

Just define mapping between RemoteDetails and LocalDetails. AutoMapper is smart enough to deal with collections of types which he knows how to map. Assume these two classes have field C:

Mapper.CreateMap<RemoteDetails, LocalDetails>()
      .ForMember(ld => ld.LocalFieldC, opt => opt.MapFrom(rd => rd.RemoteFieldC));

Mapper.CreateMap<RemoteClass, LocalClass>()
      .ForMember(lc => lc.LocalFieldA, opt => opt.MapFrom(rc => rc.RemoteFieldA))
      .ForMember(lc => lc.LocalFieldB, opt => opt.MapFrom(rc => rc.RemoteFieldB));

使用这些映射，您可以从RemoteClass映射到LocalClass:

With these mappings you can map from RemoteClass to LocalClass:

RemoteClass remote = new RemoteClass {
    RemoteFieldA = 42,
    RemoteFieldB = 100,
    collection = new [] { 
        new RemoteDetails { RemoteFieldC = "Foo" },
        new RemoteDetails { RemoteFieldC = "Bar" }
    }
};

var local = Mapper.Map<LocalClass>(remote);

结果:

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