使用 AutoMapper 映射已映射的接口集合

Question

我有以下一些 DTO 接口：

public interface IGalleryView    
{
    ICollection<IGalleryImageView> Images { get; set; }
}

public interface IGalleryImageView 
{
     // Some simple properties
}

以及以下具体类型：

public class GalleryView : IGalleryView 
{
    public GalleryView() {
        Images = new List<IGalleryImageView>();
    } 
    public ICollection<IGalleryImageView> Images { get; set; }
}

public class GalleryImageView : IGalleryImageView 
{
}

这些是从我的 EF POCO 实体映射而来的。这些实体看起来像：

public partial class Gallery {
    // Constructors removed for brevity
    public virtual ICollection<GalleryImage> Images { get; set; }
}

public partial class GalleryImage {
    public virtual Gallery Gallery { get; set; }
}

我在 AutoMapper 中如下映射这些：

AutoMapper.Mapper.CreateMap<GalleryImage, IGalleryImageView>()
            .As<GalleryImageView>();

AutoMapper.Mapper.CreateMap<Gallery, IGalleryView>()
            .As<GalleryView>();

但是，我收到以下错误：

The following property on Contracts.IGalleryImageView cannot be mapped: Images Add a custom mapping expression, ignore, add a custom resolver, or modify the destination type Contracts.IGalleryImageView. Context: Mapping to property Images from Model.GalleryImage to Contracts.IGalleryImageView Mapping to property Images from System.Collections.Generic.ICollection1[[Model.GalleryImage, Model, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] to System.Collections.Generic.ICollection1[[Contracts.IGalleryImageView, Contracts, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]] Mapping from type Model.Gallery to Contracts.IGalleryView Exception of type 'AutoMapper.AutoMapperConfigurationException' was thrown.

我不确定这里的问题是什么，因为我已经为转换指定了地图。我该如何解决这个问题？

Answer 1

上面的代码似乎没问题，问题与层级无关，但是需要在原始源对象和As方法中的对象之间创建一个映射。对于上面的 Gallery 映射，它将是：

AutoMapper.Mapper.CreateMap<Gallery, GalleryView>(); // Additional line here needed
AutoMapper.Mapper.CreateMap<GalleryView, IGalleryViewView>().As<GalleryViewView>();

使用 AutoMapper 映射已映射的接口集合

Mapping already-mapped Interface Collection using AutoMapper

c#

entity-framework

automapper