有这个场景:
public class Base { public string Name; }
public Class ClassA :Base { public int32 Number; }
public Class ClassB :Base { public string Description;}
public Class DTO {
public string Name;
public int32 Number;
public string Description;
}
我有一个 IList<Base>
我的 map 是:
AutoMapper.Mapper.CreateMap<IList<Base>, IList<DTO>>()
.ForMember(dest => dest.Number, opt => opt.Ignore())
.ForMember(dest => dest.Description, opt => opt.Ignore());
AutoMapper.Mapper.CreateMap<ClassA, DTo>()
.ForMember(dest => dest.Description, opt => opt.Ignore());
AutoMapper.Mapper.CreateMap<ClassB, DTO>()
.ForMember(dest => dest.Number, opt => opt.Ignore())
Mapper.AssertConfigurationIsValid(); //Is OK!
但是当我这样做时,ClassA 或 ClassB 中的属性不会被映射:
IList<DTO>= AutoMapper.Mapper.Map<IList<Base>,IList<DTO>>(baseList);
如何映射 ClasA
中定义的属性和 ClassB
最佳答案
您需要像这样创建与您的域类匹配的 DTO 类:
public class DTO
{
public string Name;
}
public class DTO_A : DTO
{
public int Number { get; set; }
}
public class DTO_B : DTO
{
public string Description { get; set; }
}
然后您需要将映射更改为:
Mapper.CreateMap<Base, DTO>()
.Include<ClassA, DTO_A>()
.Include<ClassB, DTO_B>();
Mapper.CreateMap<ClassA, DTO_A>();
Mapper.CreateMap<ClassB, DTO_B>();
Mapper.AssertConfigurationIsValid();
完成此操作后,将执行以下操作:
var baseList = new List<Base>
{
new Base {Name = "Base"},
new ClassA {Name = "ClassA", Number = 1},
new ClassB {Name = "ClassB", Description = "Desc"},
};
var test = Mapper.Map<IList<Base>,IList<DTO>>(baseList);
Console.WriteLine(test[0].Name);
Console.WriteLine(test[1].Name);
Console.WriteLine(((DTO_A)test[1]).Number);
Console.WriteLine(test[2].Name);
Console.WriteLine(((DTO_B)test[2]).Description);
Console.ReadLine();
不幸的是,这确实意味着您有一个不需要的类型转换,但我认为您对此无能为力。
关于c# - AutoMapper 和继承 - 如何映射?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3348634/