c# – 使用automapper將一個源類對映到多個派生類

假設我有一個源類：

public class Source
{
//Several properties that can be mapped to DerivedBase and its subclasses
}

和一些目的地類：

public class DestinationBase
{
//Several properties
}

public class DestinationDerived1 : DestinationBase
{
//Several properties
}

public class DestinationDerived2 : DestinationBase
{
//Several properties
}

然後我希望派生的目標類繼承baseclass的automapper配置,因為我不想重複它,有沒有辦法實現這一點？

Mapper.CreateMap<Source, DestinationBase>()
.ForMember(...)
// Many more specific configurations that should not have to be repeated for the derived classes
.ForMember(...);

Mapper.CreateMap<Source, DestinationDerived1 >()
.ForMember(...);
Mapper.CreateMap<Source, DestinationDerived2 >()
.ForMember(...);

當我這樣寫它,它根本不使用基本對映,包括似乎不幫助我.

編輯：

這是我得到的：

public class Source
{
public string Test { get; set; }
public string Test2 { get; set; }
}

public class DestinationBase
{
public string Test3 { get; set; }
}

public class DestinationDerived1 : DestinationBase
{
public string Test4 { get; set; }
}

public class DestinationDerived2 : DestinationBase
{
public string Test5 { get; set; }
}

Mapper.CreateMap<Source, DestinationBase>()
.ForMember(d => d.Test3, e => e.MapFrom(s => s.Test))
.Include<Source, DestinationDerived1>()
.Include<Source, DestinationDerived2>();

Mapper.CreateMap<Source, DestinationDerived1>()
.ForMember(d => d.Test4, e => e.MapFrom(s => s.Test2));

Mapper.CreateMap<Source, DestinationDerived2>()
.ForMember(d => d.Test5, e => e.MapFrom(s => s.Test2));

AutoMapper.AutoMapperConfigurationException：

未對映成員被發現.檢視下面的型別和成員.

新增自定義對映表示式,忽略,新增自定義解析器或修改源/目標型別

來源 – > DestinationDerived1(目的地成員列表)

TEST3

將派生的對映包含到基本對映中：

Mapper.CreateMap<Source, DestinationBase>()
.ForMember(d => d.Id, op => op.MapFrom(s => s.Id)) // you can remove this
.Include<Source, DestinationDerived1>()
.Include<Source, DestinationDerived2>();

Mapper.CreateMap<Source, DestinationDerived1>()
.ForMember(d => d.Name, op => op.MapFrom(s => s.Text))
.ForMember(d => d.Value2, op => op.MapFrom(s => s.Amount));

Mapper.CreateMap<Source, DestinationDerived2>()
.ForMember(d => d.Value, op => op.MapFrom(s => s.Amount));

用法：

Mapper.AssertConfigurationIsValid();
var s = new Source() { Id = 2, Amount = 10M, Text = "foo" };
var d1 = Mapper.Map<DestinationDerived1>(s);
var d2 = Mapper.Map<DestinationDerived2>(s);

參見ping-inheritance" rel="nofollow,noindex" target="_blank">Mapping inheritance AutoMapper維基.

更新：這是完整的程式碼,按照它應該工作.

public class Source
{
public int Id { get; set; }
public string Text { get; set; }
public decimal Amount { get; set; }
}

public class DestinationBase
{
public int Id { get; set; }
}

public class DestinationDerived1 : DestinationBase
{
public string Name { get; set; }
public decimal Value2 { get; set; }
}

public class DestinationDerived2 : DestinationBase
{
public decimal Value { get; set; }
}

UPDATE(AutoMapper bug的解決方法)：

public static class Extensions
{
public static IMappingExpression<Source, TDestination> MapBase<TDestination>(
this IMappingExpression<Source, TDestination> mapping)
where TDestination: DestinationBase
{
// all base class mappings goes here
return mapping.ForMember(d => d.Test3, e => e.MapFrom(s => s.Test));
}
}

和所有對映：

Mapper.CreateMap<Source, DestinationBase>()
.Include<Source, DestinationDerived1>()
.Include<Source, DestinationDerived2>()
.MapBase();

Mapper.CreateMap<Source, DestinationDerived1>()
.MapBase()
.ForMember(d => d.Test4, e => e.MapFrom(s => s.Test2));

Mapper.CreateMap<Source, DestinationDerived2>()
.MapBase()
.ForMember(d => d.Test5, e => e.MapFrom(s => s.Test2));