Question

我有一个项目，我一直在使用automapper 2.2.1。我升级到4.2.1并且完全坏了。我试着关注this 将所有对Mapper.CreateMap<Source, Target>()的引用更改为Mapper.Initialize(cfg => { cfg.CreateMap<Source, Target>()})。我现在坏了，我似乎无法完成它。我得到＆＃34; System.Reflection.ReflectionTypeLoadException未被用户代码异常处理，无法加载一个或多个要求的类型。检索LoaderExceptions属性以获取更多信息＆＃34;，message。我错过了什么代码如下所示：

AutomapperTypeAdapterFactory

public class AutomapperTypeAdapterFactory : ITypeAdapterFactory
{
    public AutomapperTypeAdapterFactory()
    {
        //scan all assemblies finding Automapper Profile
        var profiles = AppDomain.CurrentDomain
                                .GetAssemblies()
                                .SelectMany(a => a.GetTypes())
                                .Where(t => t.BaseType == typeof(Profile));

        Mapper.Initialize(cfg =>
        {
            foreach (var item in profiles)
            {
                if (item.FullName != "AutoMapper.SelfProfiler`2")
                    cfg.AddProfile(Activator.CreateInstance(item) as Profile);
            }
        });
    }

    public ITypeAdapter Create() => new AutomapperTypeAdapter();
}

部门简介

public class DepartmentProfile : Profile
{
    protected override void Configure()
    {
        Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<Department, DepartmentDto>();
        });
    }
}

UnityContainer

public static class Container
{
    static IUnityContainer _container = new UnityContainer();

    static Container()
    {
        var typeAdapterFactory = _container.Resolve<ITypeAdapterFactory>();
        TypeAdapterFactory.SetCurrent(typeAdapterFactory);
    }
    //other container resolutions....
}

Answer 1

在我离开静态配置的项目中，我已经定义了一些映射配置文件（通常是每个应用层的配置文件）：

public class MappingProfile : Profile
{
    protected override void Configure()
    {
        CreateMap<Source, Destination>();
    }
}

然后我配置我的IoC（在我的情况下是SimpleInjector）来查找所有配置文件并将它们添加到单个统一配置中。然后我在我的容器中注册MapperConfiguration，以及从同一个创建的IMapper对象：

    public void ConfigureSimpleInjector(IAppBuilder app)
    {
        var container = new Container();
        container.Options.DefaultScopedLifestyle = new WebRequestLifestyle();

        container.RegisterAutoMapper();

        container.RegisterMvcControllers(Assembly.GetExecutingAssembly());

        container.RegisterMvcIntegratedFilterProvider();

        container.Verify();

        DependencyResolver.SetResolver(new SimpleInjectorDependencyResolver(container));
    }


public static Container RegisterAutoMapper(this Container container)
    {
        var profiles = typeof(AutoMapperRegistry).Assembly.GetTypes().Where(t => typeof(Profile).IsAssignableFrom(t)).Select(t => (Profile)Activator.CreateInstance(t));

        var config = new MapperConfiguration(cfg =>
        {
            foreach (var profile in profiles)
            {
                cfg.AddProfile(profile);
            }
        });

        container.Register<MapperConfiguration>(() => config);
        container.Register<IMapper>(() => container.GetInstance<MapperConfiguration>().CreateMapper());

        return container;
    }
}

然后我可以将DI用于IMapper（或者您可以静态存储它），以及MapperConfiguration用于LINQ投影。

从Automapper 2.2.1迁移到Automapper 4.2.1

1 个答案: