我正在为以下课程使用AutoMapper + EF (Entities => POCO)：
public class Category
{
public int CategoryID { get; set; }
public string Name { get; set; }
public Category Parent { get; set; }
public IList<Category> Children { get; set; }
}
由于这个类与自身（父/子）有关系，AutoMapper 发疯了并抛出了 Stackoverflow 异常。你们有没有人遇到过这个问题？
我通过创建 CustomValueResolvers 解决了这个问题。这不是一件美丽的事情，但它正在发挥作用。
Mapper.CreateMap<Category, CategoryDTO>()
.ForMember(c => c.Parent, opt => opt.ResolveUsing<ParentResolver>())
.ForMember(c => c.Children, opt => opt.ResolveUsing<ChildrenResolver>());
Mapper.CreateMap<CategoryDTO, Category>()
.ForMember(c => c.Parent, opt => opt.ResolveUsing<ParentDTOResolver>())
.ForMember(c => c.Children, opt => opt.ResolveUsing<ChildrenDTOResolver>());
public class ParentResolver : ValueResolver<Category, CategoryDTO>
{
protected override CategoryDTO ResolveCore(Category category)
{
CategoryDTO dto = null;
if (category.Parent != null)
dto = Mapper.Map<Category, CategoryDTO>(category.Parent);
return dto;
}
}
public class ParentDTOResolver : ValueResolver<CategoryDTO, Category>
{
protected override Category ResolveCore(CategoryDTO category)
{
Category poco = null;
if (category.Parent != null)
poco = Mapper.Map<CategoryDTO, Category>(category.Parent);
return poco;
}
}
public class ChildrenResolver : ValueResolver<Category, EntityCollection<CategoryDTO>>
{
protected override EntityCollection<CategoryDTO> ResolveCore(Category category)
{
EntityCollection<CategoryDTO> dtos = null;
if (category.Children != null && category.Children.Count > 0)
dtos = Mapper.Map<IList<Category>, EntityCollection<CategoryDTO>>(category.Children);
return dtos;
}
}
public class ChildrenDTOResolver : ValueResolver<CategoryDTO, IList<Category>>
{
protected override IList<Category> ResolveCore(CategoryDTO category)
{
IList<Category> pocos = null;
if (category.Children != null && category.Children.Count > 0)
pocos = Mapper.Map<EntityCollection<CategoryDTO>, IList<Category>>(category.Children);
return pocos;
}
}
这似乎是一个已知问题。Automapper 进入一个无限循环。
这是一个成功解决此问题的人的链接：
在此处添加此页面的翻译版本的链接 :)