如何解决AutoMapper错误？ （计算器除外！）(How to resolve AutoMa

我使用AutoMapper + EF（实体=> POCO）为下面的类：

public class Category
{
    public int CategoryID { get; set; }

    public string Name { get; set; }

    public Category Parent { get; set; }

    public IList<Category> Children { get; set; }
}

因为此类具有的与其自身（父/子）的关系，AutoMapper疯了，扔一个例外＃1。 曾经任你经历过这个问题？

Answer 1:

我已经通过创建CustomValueResolvers解决它。 这不是美丽的事情，但它的工作。

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;
        }
    }

Answer 2:

这似乎是一个已知的问题。 Automapper进去的infinate循环。

这里的人谁管理，以解决这个问题的链接：

http://blogs.ugidotnet.org/lmauri/archive/2009/05/02/automapper-efpocogenerator-entityframework-and-associations.aspx

加入这里是此页的翻译版本的链接:)

http://translate.google.com/translate?hl=en&sl=it&u=http://blogs.ugidotnet.org/lmauri/archive/2009/05/02/automapper-efpocogenerator-entityframework-and-associations.aspx&ei= UneASvahFoPe-Qa_38RU＆SA = X＆OI =翻译＆resnum = 2＆CT =导致与先前= /搜索％3Fq％3Dstackoverflow％2Bautomapper％26hl％3Den％26sa％3DN％26start％3D20

文章来源: How to resolve AutoMapper error? (stackoverflow exception!)