Question

我有一个AutoMapper问题，现在已经让我疯狂了很长时间。类似的问题也发布在AutoMapper用户网站上，但没有太多的爱。

总结是我有一个包含组件字典的容器类。组件是公共基类的派生对象。我也有一个并行结构，我正在使用它作为我要映射的DTO对象。

生成的错误似乎表明映射器无法在我在CreateMap调用中包含的两个类之间进行映射。我认为错误与我有一个不属于容器层次结构的对象的字典这一事实有关。

我提前为下面代码的长度道歉。我的简单测试用例有效。毋庸置疑，只有更复杂的情况才会失败。

以下是课程：

#region Dto objects

public class ComponentContainerDTO
{
    public Dictionary<string, ComponentDTO> Components { get; set; }

    public ComponentContainerDTO()
    {
        this.Components = new Dictionary<string, ComponentDTO>();
    }
}

public class EntityDTO : ComponentContainerDTO
{
    public int Id { get; set; }

}

public class ComponentDTO
{
    public EntityDTO Owner { get; set; }
    public int Id { get; set; }
    public string Name { get; set; }
    public string ComponentType { get; set; }
}

public class HealthDTO : ComponentDTO
{
    public decimal CurrentHealth { get; set; }

}

public class PhysicalLocationDTO : ComponentDTO
{
    public Point2D Location { get; set; }
}
#endregion


#region Domain objects

public class ComponentContainer
{
    public Dictionary<string, Component> Components { get; set; }

    public ComponentContainer()
    {
        this.Components = new Dictionary<string, Component>();
    }
}

public class Entity : ComponentContainer
{
    public int Id { get; set; }

}

public class Component
{
    public Entity Owner { get; set; }
    public int Id { get; set; }
    public string Name { get; set; }
    public string ComponentType { get; set; }

}

public class Health : Component
{
    public decimal CurrentHealth { get; set; }
}

public struct Point2D
{
    public decimal X;
    public decimal Y;

    public Point2D(decimal x, decimal y)
    {
        X = x;
        Y = y;
    }
}

public class PhysicalLocation : Component
{
    public Point2D Location { get; set; }
}
#endregion

代码：

var entity = new Entity() { Id = 1 };
var healthComponent = new Health() { CurrentHealth = 100, Owner = entity, Name = "Health", Id = 2 };
entity.Components.Add("1", healthComponent);
var locationComponent = new PhysicalLocation() { Location = new Point2D() { X = 1, Y = 2 }, Owner = entity, Name = "PhysicalLocation", Id = 3 };
entity.Components.Add("2", locationComponent);

Mapper.CreateMap<ComponentContainer, ComponentContainerDTO>()
    .Include<Entity, EntityDTO>();

Mapper.CreateMap<Entity, EntityDTO>();

Mapper.CreateMap<Component, ComponentDTO>()
    .Include<Health, HealthDTO>()
    .Include<PhysicalLocation, PhysicalLocationDTO>();

Mapper.CreateMap<Component, ComponentDTO>();
Mapper.CreateMap<Health, HealthDTO>();
Mapper.CreateMap<PhysicalLocation, PhysicalLocationDTO>();

Mapper.AssertConfigurationIsValid();

var targetEntity = Mapper.Map<Entity, EntityDTO>(entity);

调用Map（）（缩写堆栈抓取）时的错误：

AutoMapper.AutoMapperMappingException was unhandled
  Message=Trying to map MapperTest1.Entity to MapperTest1.EntityDTO.
Using mapping configuration for MapperTest1.Entity to MapperTest1.EntityDTO
Exception of type 'AutoMapper.AutoMapperMappingException' was thrown.
  Source=AutoMapper
  StackTrace:
       at AutoMapper.MappingEngine.AutoMapper.IMappingEngineRunner.Map(ResolutionContext context)
.
.
.

  InnerException: AutoMapper.AutoMapperMappingException
       Message=Trying to map System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[MapperTest1.Component, ElasticTest1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] to System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[MapperTest1.ComponentDTO, ElasticTest1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].
Using mapping configuration for MapperTest1.Entity to MapperTest1.EntityDTO
Destination property: Components
Exception of type 'AutoMapper.AutoMapperMappingException' was thrown.
       Source=AutoMapper
       StackTrace:
            at AutoMapper.Mappers.TypeMapObjectMapperRegistry.PropertyMapMappingStrategy.MapPropertyValue(ResolutionContext context, IMappingEngineRunner mapper, Object mappedObject, PropertyMap propertyMap)
.
.

       InnerException: AutoMapper.AutoMapperMappingException
            Message=Trying to map System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[MapperTest1.Component, ElasticTest1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] to System.Collections.Generic.Dictionary`2[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[MapperTest1.ComponentDTO, ElasticTest1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].
Using mapping configuration for MapperTest1.Entity to MapperTest1.EntityDTO
Destination property: Components
Exception of type 'AutoMapper.AutoMapperMappingException' was thrown.
            Source=AutoMapper
            StackTrace:
                 at AutoMapper.MappingEngine.AutoMapper.IMappingEngineRunner.Map(ResolutionContext context)
                 .
            InnerException: AutoMapper.AutoMapperMappingException
                 Message=Trying to map MapperTest1.Component to MapperTest1.ComponentDTO.
Using mapping configuration for MapperTest1.Health to MapperTest1.HealthDTO
Destination property: Components
Exception of type 'AutoMapper.AutoMapperMappingException' was thrown.
                 Source=AutoMapper
                 StackTrace:
                      at AutoMapper.MappingEngine.AutoMapper.IMappingEngineRunner.Map(ResolutionContext context)
                      .
.

                 InnerException: AutoMapper.AutoMapperMappingException
                      Message=Trying to map System.Decimal to System.Decimal.
Using mapping configuration for MapperTest1.Health to MapperTest1.HealthDTO
Destination property: CurrentHealth
Exception of type 'AutoMapper.AutoMapperMappingException' was thrown.
                      Source=AutoMapper
                      StackTrace:
                           at AutoMapper.Mappers.TypeMapObjectMapperRegistry.PropertyMapMappingStrategy.MapPropertyValue(ResolutionContext context, IMappingEngineRunner mapper, Object mappedObject, PropertyMap propertyMap)

.
.
                      InnerException: System.InvalidCastException
                           Message=Unable to cast object of type 'MapperTest1.ComponentDTO' to type 'MapperTest1.HealthDTO'.
                           Source=Anonymously Hosted DynamicMethods Assembly
                           StackTrace:
                                at SetCurrentHealth(Object , Object )
.
.

提前谢谢。

瑞克

Answer 1

这是一个已在1.1.0.184版本中修复的错误。

谢谢吉米修理它。

瑞克

AutoMapper不适用于Container类

1 个答案: