如何使用Unity

时间:2016-04-21 21:12:07

标签: c# unity-container automapper

我有以下AutoMapper个人资料:

public class AutoMapperBootstrap : Profile
{
    protected override void Configure()
    {
        CreateMap<Data.EntityFramework.RssFeed, IRssFeed>().ForMember(x => x.NewsArticles, opt => opt.MapFrom(y => y.RssFeedContent));
        CreateMap<IRssFeedContent, Data.EntityFramework.RssFeedContent>().ForMember(x => x.Id, opt => opt.Ignore());
    }
}

我正在初始化它:

var config = new MapperConfiguration(cfg =>
{
       cfg.AddProfile(new AutoMapperBootstrap());
});

container.RegisterInstance<IMapper>("Mapper", config.CreateMapper());

当我尝试在构造函数中注入它时:

private IMapper _mapper;
public RssLocalRepository(IMapper mapper)
{
    _mapper = mapper;
}

我收到以下错误:

  

当前类型AutoMapper.IMapper是一个接口,不能   建造。你错过了类型映射吗?

如何使用Unity正确初始化AutoMapper配置文件,以便我可以通过DI在任何地方使用映射器?

2 个答案:

答案 0 :(得分:9)

在您的示例中,您正在创建命名映射:

// named mapping with "Mapper name"
container.RegisterInstance<IMapper>("Mapper", config.CreateMapper());

但你的解析器将如何知道这个名字?

您需要注册没有名称的映射:

// named mapping with "Mapper name"
container.RegisterInstance<IMapper>(config.CreateMapper());

它会将您的映射器实例映射到IMapper接口,此实例将在解析接口上返回

答案 1 :(得分:1)

你可以这样注册:

http://code.ionicframework.com/resources/splash.psd

然后您可以将其注入- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ CustomeCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellId" forIndexPath:indexPath]; cell.image = image; cell.imageViewHeightConstraint.constant = [self calcuteSizeWithImage:image]; //you need to do the calculation yourself return cell; }

container.RegisterType<IMappingEngine>(new InjectionFactory(_ => Mapper.Engine));

更多信息请点击此处:

https://kalcik.net/2014/08/13/automatic-registration-of-automapper-profiles-with-the-unity-dependency-injection-container/