我试图让Automapper在ASP.Net MVC应用程序中与Autofac配合使用.

我已按照答案中的说明进行操作：Autofac 3 and Automapper

但是在第一次调用_mapper.Map<>(…)时失败了

Autofac的设置如下：

builder.RegisterType<EntityMappingProfile>().As<Profile>();

builder.Register(ctx => new ConfigurationStore(new TypeMapFactory(), MapperRegistry.Mappers))
    .AsImplementedInterfaces()
    .SingleInstance()
    .OnActivating(x =>
    {
        foreach (var profile in x.Context.Resolve<IEnumerable<Profile>>())
        {
            x.Instance.AddProfile(profile);
        }
    });

builder.RegisterType<MappingEngine>().As<IMappingEngine>();

然后在我的业务层我有这样的服务：

public class LinkService : ILinkService
{
    private readonly ILinkRepository _linkRepository;
    private readonly IMappingEngine _mapper;
    public LinkService(ILinkRepository linkRepository, IMappingEngine mapper)
    {
        _linkRepository = linkRepository;
        _mapper = mapper;

    }

    public IEnumerable<LinkEntity> Get()
    {
        var links = _linkRepository.Get().ToList();
        return _mapper.Map<IEnumerable<Link>, IEnumerable<LinkEntity>>(links);
    }

    public LinkEntity GetById(int id)
    {
        var link = _linkRepository.GetById(id);
        return _mapper.Map<Link, LinkEntity>(link);
    }
}

对_mapper.Map< IEnumerable< Link>,IEnumerable< LinkEntity>>的调用
失败了：

Missing type map configuration or unsupported mapping.

我可能会出错的任何想法？

解决方法:

你缺少创建Mapper,在EntityMappingProfile中创建LinkEntity的地图链接：

  internal class EntityMappingProfile :Profile
{
    protected override void Configure()
    {
        base.Configure();
        this.CreateMap<Link, LinkEntity>();
    }
}