自动映射和从Collection或List继承 [英] Automapper and inheritance from Collection or List

问题描述

我正在尝试使用AutoMapper(v5.1.1)映射从列表或集合继承的对象.映射调用不会给我错误，但是输出是一个空列表(尽管类型正确).

I'm trying to use AutoMapper (v5.1.1) to map an object which inherits from a List or Collection. The map call does not give me an error but the output is an empty list (of correct type though).

我可以获得 List< DestinationObject> 或 Collection< DestinationObject> ，但是当具有从 List<继承的自定义类时，它似乎不起作用; T> 或 Collection< T> .

I can get a List<DestinationObject> or Collection<DestinationObject>, but it does not seem to work when having a custom class which enherits from List<T> or Collection<T>.

我尝试将第一个地图定义扩展为包括基类( List< T> )，但这给了我StackOverflowException.

I've tried extending the first map definition to include the base class (List<T>) but that gives me a StackOverflowException.

cfg.CreateMap(typeof(SourceCollection), typeof(DestinationCollection)).Include(typeof(List<SourceObject>), typeof(List<DestinationObject>)); 

我在这里想念什么?

public class SourceCollection : List<SourceObject> {

}

public class DestinationCollection : List<DestinationObject> {

}

public class SourceObject {

    public string Message { get; set; }
}

public class DestinationObject {

  public string Message { get; set; }
}


static void Main(string[] args)
{

    AutoMapper.Mapper.Initialize(cfg =>
    {
        cfg.CreateMap(typeof(SourceCollection), typeof(DestinationCollection)); 
        cfg.CreateMap<List<SourceObject>, List<DestinationObject>>().Include<SourceCollection, DestinationCollection>();
        cfg.CreateMap(typeof(SourceObject), typeof(DestinationObject));
    });

    AutoMapper.Mapper.AssertConfigurationIsValid();

    SourceCollection srcCol = new SourceCollection() { new SourceObject() { Message = "1" }, new SourceObject() { Message = "2" } };
    DestinationCollection dstCol = AutoMapper.Mapper.Map<SourceCollection, DestinationCollection>(srcCol);
}

推荐答案

您只需要将sourceobject映射到destinationobject，AutoMapper将完成其余的工作，有关更多信息，请参见

You just have to map sourceobject to destinationobject, AutoMapper will do rest of the magic, More on this can be found on this link

cfg.CreateMap(typeof(SourceObject), typeof(DestinationObject));

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