AutoMapper不忽略嵌套类型 [英] AutoMapper doesn't ignore nested types

问题描述

我有一个情况AutoMapper不能与忽视成员的工作。这里是阶级结构和映射。

I have a situation where AutoMapper doesn't work properly with ignoring members. Here is the class structure and mappings.

public class Class1 {
      public Class2 Class2 { get; set; }
}

public class Class2 {
     public List<Class3> class3List { get; set; }
}

Mapper.CreateMap<Class1, Class1>();
Mapper.CreateMap<Class2, Class2>
    .ForMember(dest => dest.class3List, opt => opt.Ignore());
Mapper.CreateMap<Class3, Class3>();

当我1级映射到Class 1

And when I map Class1 to Class1

Mapper.Map<Class1, Class1>(object1, object2);

在对象2的class3List是空的，但映射收到的项目。如果我做了这样的映射。

In object 2 the class3List is empty, but before the mapping it had items. If I do the mapping like this.

Mapper.CreateMap<Class1, Class1>();
    .ForMember(dest => dest.Class2, opt => opt.Ignore());
Mapper.CreateMap<Class2, Class2>();
Mapper.CreateMap<Class3, Class3>();

它忽略了等级2财产，因为它应该。 所以，我怎么可以忽略class3List并没有排空，当映射1级到1级？

It ignores the Class2 property as it should. So how can I ignore class3List and not emptying it, when mapping Class1 to Class1?

推荐答案

一般映射从一类中的一个类型来完成的一类其他类型。什么是你想在这里实现？克隆？

Usually mapping is done from a class of one type to a class of another type. What are you trying to achieve here? A Clone?

综观API，我认为最好是使用UseDestinationValue（），而不是忽略。不过，我觉得你的code测试，它没有似乎工作仍在。

Looking at the API I think best to used UseDestinationValue() rather than Ignore. I tested it with your code though and it didnt seem to work still.

 Mapper.CreateMap<ParentFoo, ParentBar>()
     .ForMember(b => b.Child, o => o.UseDestinationValue());

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