Question

I would like to define a mapping (or even a TypeConverter/Resolver) for the following classes: Destination:

   public class Destination
    {
        public DestinationEnum EnumProperty { get; set; }

        public Destination()
        {
            EnumProperty = DestinationEnum.undefined;
        }
    }

    public enum DestinationEnum
    {
        oneValue,
        anotherValue, 
        undefined
    }

来源：

    public enum SourceEnum
    { 
        fu,
        ba
    }

    public enum AnotherSourceEnum
    { 
        first,
        second, 
        third
    }

    public class Source
    {
        public SourceEnum SourceEnumVal { get; set; }
    }

    public class ConcreteSource : Source
    {
        public AnotherSourceEnum ConcreteSourceEnumVal { get; set; }
    }

What would the AutoMapper Mapping look like, if I want to specify a destination value of the DestinationEnum in the Destination class depending on the concrete Source Type? E.g.

if the mapper maps from class "Source" to "Destination", the Destination.EnumProperty should be set to "undefined" if Source.SourceEnumVal == fu
if the mapper maps from class "source" to "Destination", the Destination.EnumProperty should be set to "oneValue" if Source.SourceEnumVal == "ba"
if the mapper maps from class "ConcreteSource" to "Destination", the Destination.EnumProperty should be set to "oneValue" if ConcreteSource.ConcreteSourceEnumVal == "second"
if the the mapper maps from class "ConcreteSource" to "Destination", the Destination.EnumProperty should be set to "undefined" if ConcreteSource.ConcreteSourceEnumVal != "second"

Answer 1

你将创建两张地图：

Mapper.CreateMap<Source, Destination>();
Mapper.CreateMap<ConcreteSource, Destination>();

然后针对每个地图进行自定义解析器：

Mapper.CreateMap<Source, Destination>()
    .ForMember(dest => dest.EnumProperty, opt => opt.ResolveUsing<FirstResolver>());

您的第二个ConcreteSource地图将使用不同的解析器：

Mapper.CreateMap<ConcreteSource, Destination>()
    .ForMember(dest => dest.EnumProperty, opt => opt.ResolveUsing<SecondResolver>());

AutoMapper选择根据来源和目的地类型进行测绘,因此,无论使用哪一种来源类型,都会选择正确的决心。

友情链接