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我正在使用 MVC4 Web API 和 Simple Injector 构建一个 Web API，它应该公开各种 CRUD 和查询操作。在我的案例中使用 IOC 的原因是我们是一家开发商店，我需要能够让客户构建他们自己的 web api 控制器来公开他们需要从我们的系统中公开需求的数据。因此，我希望设计我的解决方案，使我能够通过 IOC 将所有控制器（包括我们的和我们的客户的）置于外部并可加载，从而使我能够对自己的产品进行测试。

该网站没有对库的任何引用，但该库包含我想在网站中使用的控制器。我有找到 dll 插件并加载控制器类型的代码，但是当我尝试导航到它所代表的路线时，它说找不到它。

即如果我尝试导航到 /api/Test1Api 我应该看到文本“hello world”

我的问题是，虽然我已经加载了控制器类型，但我无法将其转换为网站所说的路径。

这是我注册容器的方式

[assembly: WebActivator.PostApplicationStartMethod(typeof(Spike.Web.Api.App_Start.SimpleInjectorInitializer), "Initialize")]
public static class SimpleInjectorInitializer
{
    public static void Initialize()
    {
        // Create the IOC container.
        var container = new Container();

        InitializeContainer(container);

        container.RegisterMvcAttributeFilterProvider();
        // Verify the container configuration
        container.Verify();

        // Register the dependency resolver.
        GlobalConfiguration.Configuration.DependencyResolver =
                    new SimpleInjectorWebApiDependencyResolver(container);
        //DependencyResolver.SetResolver(new SimpleInjectorWebApiDependencyResolver(container));
    }

    private static void InitializeContainer(Container container)
    {
        var appPath = AppDomain.CurrentDomain.BaseDirectory;

        string[] files = Directory.GetFiles(appPath + "\\bin\\Plugins", "*.dll",
            SearchOption.AllDirectories);
        var assemblies = files.Select(Assembly.LoadFile);

        // register Web API controllers
        var apiControllerTypes =
            from assembly in assemblies
            where !assembly.IsDynamic
            from type in assembly.GetExportedTypes()
            where typeof(IHttpController).IsAssignableFrom(type)
            where !type.IsAbstract
            where !type.IsGenericTypeDefinition
            where type.Name.EndsWith("Controller", StringComparison.Ordinal)
            select type;

        // register MVC controllers
        var mvcControllerTypes =
            from assembly in assemblies
            where !assembly.IsDynamic
            from type in assembly.GetExportedTypes()
            where typeof(IController).IsAssignableFrom(type)
            where !type.IsAbstract
            where !type.IsGenericTypeDefinition
            where type.Name.EndsWith("Controller", StringComparison.Ordinal)
            select type;

        foreach (var controllerType in apiControllerTypes)
        {
            container.Register(controllerType);
        }

        foreach (var controllerType in mvcControllerTypes)
        {
            container.Register(controllerType);
        }
    }
}
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1 回答 1

1

I figured it out!

So I created a new class in my Web Api call CustomAssembliesResolver that inherits from DefaultAssembliesResolver. Essentially I add my assembly to the list of assemblies that are parsed when looking for controllers. I still have the code that uses Simple Injector for the DI portion of the solution.

public class CustomAssembliesResolver : DefaultAssembliesResolver
{
    public override ICollection<Assembly> GetAssemblies()
    {
        var appPath = AppDomain.CurrentDomain.BaseDirectory;
        var baseAssemblies = base.GetAssemblies();
        var assemblies = new List<Assembly>(baseAssemblies);
        var files = Directory.GetFiles(appPath + "\\bin\\Plugins", "*.dll",
                        SearchOption.AllDirectories);
        var customAssemblies = files.Select(Assembly.LoadFile);

        // register Web API controllers
        var apiControllerAssemblies =
            from assembly in customAssemblies
            where !assembly.IsDynamic
            from type in assembly.GetExportedTypes()
            where typeof(IHttpController).IsAssignableFrom(type)
            where !type.IsAbstract
            where !type.IsGenericTypeDefinition
            where type.Name.EndsWith("Controller", StringComparison.Ordinal)
            select assembly;

        foreach (var assembly in apiControllerAssemblies)
        {
            baseAssemblies.Add(assembly);
        }

        return assemblies;
    }
}

I also added the following line to the beginning of the App_Start in the Global.asax.cs

GlobalConfiguration.Configuration.Services.Replace(typeof(IAssembliesResolver), new CustomAssembliesResolver());

Hope this helps someone!

于 2013-06-01T01:39:58.843 回答