Question

我想指定一个映射，以便所有映射来自＆＃34; Source＆＃34;到目的地＆＃34;作为＆＃34; Destination＆＃34;

的派生类返回

    [Test]
    public void Map_SourceToDestinationAsDerivedType_ReturnsDerivedType()
    {
        // arrange
        AutoMapper.Mapper.CreateMap<Source, Destination>()
            .CreateAs<ActualDestination>() // psedu code
            .ForMember(dst => dst.Transformed, opt => opt.ResolveUsing(src => src.Property));

        var source = new Source{Property = "hi mom" };

        // act
        var destination = AutoMapper.Mapper.Map<Destination>(source);

        // assert
        Assert.That(destination, Is.InstanceOf<ActualDestination>());
    }

    public class Source
    {
        public string Property { get; set; }
    }

    public class Destination
    {

    }

    public class ActualDestination : Destination
    {
        public string Transformed { get; set; }            
    }

Answer 1

Automapper

不直接支持

然而，您可以获得的最接近的是为Source, ActualDestination对

定义一个映射器

AutoMapper.Mapper.CreateMap<Source, ActualDestination>() 
    .ForMember(dst => dst.Transformed, opt => opt.ResolveUsing(src => src.Property));

然后使用ConstructUsing映射中的Source, Destination选项进行从Source到ActualDestination的翻译：

AutoMapper.Mapper.CreateMap<Source, Destination>()
    .ConstructUsing((Source s) => AutoMapper.Mapper.Map<ActualDestination>(s));

映射到AutoMapper中的派生目标类型

1 个答案: