AutoMapper双向映射

Question

如果我想进行双向映射,是否需要创建两个映射？

Mapper.CreateMap<A, B>() and Mapper.CreateMap<B, A>()？

Answer 1

是的,但如果您发现自己经常这样做:

public static class AutoMapperExtensions
{
    public static void Bidirectional<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
    {
        Mapper.CreateMap<TDestination, TSource>();
    }
}

然后:

Mapper.CreateMap<A, B>().Bidirectional();

Answer 2

是的,因为如果你改变某些属性的类型(例如DateTime - > string),它不是双向的(你需要指示Automapper如何转换字符串 - > DateTime).

Answer 3

现在已经将其添加到AutoMapper中

Mapper.CreateMap<SourceType, DestType>().ReverseMap();

Answer 4

好主意埃里克!我添加了一个返回值,因此反向映射也是可配置的.

public static class AutoMapperExtensions
{
    public static IMappingExpression<TDestination, TSource> Bidirectional<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
    {
        return Mapper.CreateMap<TDestination, TSource>();
    }
}