我是否需要创建automapper createmap两者兼得？ [英] Do i need to create automapper createmap both ways?

问题描述

这可能是一个愚蠢的问题！ （要的n00b和AutoMapper时间短！）

This might be a stupid question! (n00b to AutoMapper and time-short!)

我想使用AutoMapper从EF4实体映射到视图模型类。

I want to use AutoMapper to map from EF4 entities to ViewModel classes.

1）如果我称之为

CreateMap<ModelClass, ViewModelClass>()

然后做我还需要调用

then do I also need to call

CreateMap<ViewModelClass, ModelClass>()

执行反向？

2）如果两个类具有相同的属性名称，然后做我需要一个CreateMap声明可言，或者这只是对特定/自定义映射？

2) If two classes have the same property names, then do I need a CreateMap statement at all, or is this just for "specific/custom" mappings?

推荐答案

在AutoMapper你有一个源类型和目标类型。所以，你将只能如果你有一个相应的CreateMap这种源类型和目标类型之间的映射。因此，要回答你的问题：

In AutoMapper you have a Source type and a Destination type. So you will be able to map between this Source type and Destination type only if you have a corresponding CreateMap. So to answer your questions:

1. 您不要的需要的定义反向映射。你所要做的仅仅是，如果你打算映射回。


2. 是的，你需要调用CreateMap表明，这些类型是可映射的，否则，当你调用一个会抛出异常地图＆LT; TSource，TDest＆GT; 告诉你一个映射源和目的地之间的类型不存在。

1. You don't need to define the reverse mapping. You have to do it only if you intend to map back.
2. Yes, you need to call CreateMap to indicate that those types are mappable otherwise an exception will be thrown when you call Map<TSource, TDest> telling you that a mapping doesn't exist between the source and destination type.

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