Automapper：与ReverseMap（）和ForMember双向映射（） [英] Automapper: bidirectional mapping with ReverseMap() and ForMember()

问题描述

我有我想要的实体映射到一个视图模型和后面的情况。我必须用ForMember（）显式地指定映射，因为它们的属性不共享完全相同的名称。下面是我的课怎么看起来像一个简单的例子：

I have the case where I want to map an entity to a viewmodel and back. I have to specify the mapping explicitly with ForMember() because their properties do not share the exact same names. Here is a short example of how my classes look like:

public class PartTwo {
    public int Integer { get; set; }
}

public class PartTwoViewModel {
    public int PartInteger { get; set; }
}

和我想使用它们是这样的：

And I want to use them this way:

Mapper.CreateMap<PartTwo, PartTwoViewModel>()
    .ForMember(dst => dst.PartInteger, opt => opt.MapFrom(src => src.Integer))
    .ReverseMap();

var partTwoViewModel = new PartTwoViewModel() { PartInteger = 42 };
var partTwo = Mapper.Map<PartTwoViewModel, PartTwo>(partTwoViewModel);
Assert.AreEqual(partTwoViewModel.PartInteger, partTwo.Integer);

但它的属性PartInteger为整型不匹配。 （整数为0。）

But it does not match the property PartInteger to Integer. (Integer is 0.)

有没有一种方法，使这项工作？ （当两个类的属性具有相同的名称它的作品。）我必须设置一些选项的方法ForMember（）？

Is there a way to make this work? (When the properties of both classes have the same names it works.) Do I have to set some kind of option in the method ForMember()?

推荐答案

您可以这样定义你的配置：

You could define your configuration like this:

Mapper.CreateMap<PartTwo, PartTwoViewModel>()
    .ForMember(dst => dst.PartInteger, opt => opt.MapFrom(src => src.Integer));

Mapper.CreateMap<PartTwoViewModel, PartTwo>()
    .ForMember(dst => dst.Integer, opt => opt.MapFrom(src => src.PartInteger));

更新

下面是提交其中 ReverseMap 最初实现。从我可以在code看，它仅创建一个简单的反向映射。例如，在这种情况下，它会自动配置是等效的：

Here is the commit where ReverseMap was initially implemented. From what I can see in the code, it only creates a simple reverse mapping. For example, in this case it would automatically configure the equivalent of:

Mapper.CreateMap<PartTwoViewModel, PartTwo>();

要得到任何东西更复杂，我怕你将不得不手动进行配置。

To get anything more complex, I'm afraid that you're going to have to configure it manually.

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