c# - 使用 AutoMapper.Profile 创建实例(非静态)映射器

Question

我使用以下答案中描述的方法来创建映射器的实例:

var platformSpecificRegistry = AutoMapper.Internal.PlatformAdapter.Resolve<IPlatformSpecificMapperRegistry>();
platformSpecificRegistry.Initialize();

var autoMapperCfg = new AutoMapper.ConfigurationStore(new TypeMapFactory(), AutoMapper.Mappers.MapperRegistry.Mappers);
var mappingEngine = new AutoMapper.MappingEngine(_autoMapperCfg);

如以下问题所述:

AutoMapper How To Map Object A To Object B Differently Depending On Context .

我怎样才能使用[重用] Automapper profile像下面这样的类来创建映射器的实例？

public class ApiTestClassToTestClassMappingProfile : Profile
{
    protected override void Configure()
    {
        base.Configure();
        Mapper.CreateMap<ApiTestClass, TestClass>()
            .IgnoreAllNonExisting();
    }
}

只是为了让您了解为什么我需要这样的功能:我使用以下方法将所有 Automapper 配置文件类注册到我的 IoC 容器 [CaSTLeWindsor] 中:

    IoC.WindsorContainer.Register(Types.FromThisAssembly()
                                       .BasedOn<Profile>()
                                       .WithServiceBase()
                                       .Configure(c => c.LifeStyle.Is(LifestyleType.Singleton)));

    var profiles = IoC.WindsorContainer.ResolveAll<Profile>();

    foreach (var profile in profiles)
    {
        Mapper.AddProfile(profile);
    }

    IoC.WindsorContainer.Register(Component.For<IMappingEngine>().Instance(Mapper.Engine));

虽然上面完全满足了初始化我的静态 Mapper 类的需要，但我真的不知道如何重新使用我的 Automapper 配置文件类来创建实例映射器 [使用非静态映射器]。

Answer 1

这就是您使用配置文件创建 MapperConfiguration 的方式

public static class MappingProfile
{
    public static MapperConfiguration InitializeAutoMapper()
    {
        MapperConfiguration config = new MapperConfiguration(cfg =>
        {
            cfg.AddProfile(new WebMappingProfile());  //mapping between Web and Business layer objects
            cfg.AddProfile(new BLProfile());  // mapping between Business and DB layer objects
        });

        return config;
    }
}

配置文件示例

//Profile number one saved in Web layer
public class WebMappingProfile : Profile
{
    public WebMappingProfile()
    {
        CreateMap<Question, QuestionModel>();
        CreateMap<QuestionModel, Question>();
        /*etc...*/
    }
}

//Profile number two save in Business layer
public class BLProfile: Profile
{
    public BLProfile()
    {
        CreateMap<BLModels.SubModels.Address, DataAccess.Models.EF.Address>();
        /*etc....*/
    }
}

将自动映射器连接到 DI 框架(这是 Unity)

public static class UnityWebActivator
{
    /// <summary>Integrates Unity when the application starts.</summary>
    public static void Start()
    {
        var container = UnityConfig.GetConfiguredContainer();
        var mapper = MappingProfile.InitializeAutoMapper().CreateMapper();
        container.RegisterInstance<IMapper>(mapper);

        FilterProviders.Providers.Remove(FilterProviders.Providers.OfType<FilterAttributeFilterProvider>().First());
        FilterProviders.Providers.Add(new UnityFilterAttributeFilterProvider(container));

        DependencyResolver.SetResolver(new UnityDependencyResolver(container));

        // TODO: Uncomment if you want to use PerRequestLifetimeManager
        // Microsoft.Web.Infrastructure.DynamicModuleHelper.DynamicModuleUtility.RegisterModule(typeof(UnityPerRequestHttpModule));
    }

    /// <summary>Disposes the Unity container when the application is shut down.</summary>
    public static void Shutdown()
    {
        var container = UnityConfig.GetConfiguredContainer();
        container.Dispose();
    }
}

在你的类中使用 IMapper 进行映射

public class BaseService
{
    protected IMapper _mapper;

    public BaseService(IMapper mapper)
    {
        _mapper = mapper;
    }

    public void AutoMapperDemo(){
        var questions = GetQuestions(token);
        return _mapper.Map<IEnumerable<Question>, IEnumerable<QuestionModel>>(questions);
    }

    public IEnumerable<Question> GetQuestions(token){
        /*logic to get Questions*/
    }
}

我的原始帖子可以在这里找到:http://www.codeproject.com/Articles/1129953/ASP-MVC-with-Automapper-Profiles