Question

我正在使用MVC4 Web API和Simple Injector构建Web API，它应该公开各种CRUD和查询操作。在我的案例中使用IOC的原因是我们是一个开发商店，我需要能够让客户构建他们自己的web api控制器，以暴露他们需要从我们的系统公开需要的数据。因此，我希望设计我的解决方案的方式允许我通过IOC将所有控制器（包括我们的和客户的，外部的和可加载的）控制好我自己的产品。

该网站没有任何对该库的引用，但该库包含我想在网站中使用的控制器。我有代码找到dll插件并加载控制器类型，但当我尝试导航到它将代表的路线它说它找不到它。

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，虽然我已经加载了我的控制器类型，但我无法将其转换为网站所说的路线。

以下是我如何注册容器

[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);
        }
    }
}

Answer 1

我明白了！

所以我在Web Api调用CustomAssembliesResolver中创建了一个新类，它继承自DefaultAssembliesResolver。基本上我将我的程序集添加到查找控制器时解析的程序集列表中。我仍然有使用Simple Injector的代码用于解决方案的DI部分。

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;
    }
}

我还在Global.asax.cs中将以下行添加到App_Start的开头

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

希望这有助于某人！

Web API＆amp;简单的注入器 - 问题解决从外部DLL加载的控制器

1 个答案: