Question

我有WebForms项目，我有WebApi控制器。我如何注入控制器构造函数和动作过滤器构造函数？

我已实施IDependencyResolver并在Global.asax（GlobalConfiguration.Configuration.DependencyResolver）中使用它，但它没有帮助：在请求控制器上说没有默认构造函数和应用程序启动过滤器说它不包含一个带0参数的构造函数。

此外，我需要单线注射动作过滤器。

感谢。

UPD



public class ScopeContainer : IDependencyScope
{
    protected readonly IUnityContainer _container;

    public ScopeContainer(IUnityContainer container)
    {
        _container = container;
    }

    public object GetService(Type serviceType)
    {
        return _container.IsRegistered(serviceType) ? _container.Resolve(serviceType) : null;
    }

    public IEnumerable<object> GetServices(Type serviceType)
    {
        return _container.IsRegistered(serviceType) ? _container.ResolveAll(serviceType) : new List<object>();
    }

    public void Dispose()
    {
        _container.Dispose();
    }
}

public class IoCContainer : ScopeContainer, IDependencyResolver
{
    public IoCContainer(IUnityContainer container) : base(container)
    {
    }

    public IDependencyScope BeginScope()
    {
        var child = _container.CreateChildContainer();

        return new ScopeContainer(child);
    }
}

public class Global : HttpApplication
{
    void Application_Start(object sender, EventArgs e)
    {
        RegisterRoutes();
        ConfigureApi(GlobalConfiguration.Configuration);
    }

    void ConfigureApi(HttpConfiguration config)
    {
        var unity = new UnityContainer();

        unity.RegisterInstance<ILogger>(new Logger());
        unity.RegisterType<IRepository, DbRepository>();

        config.DependencyResolver = new IoCContainer(unity);
    }

    private static void RegisterRoutes()
    {
        RouteTable.Routes.MapHttpRoute("ServiceApi", "api/{controller}/{action}");
    }
}

public class ScopeContainer : IDependencyScope { protected readonly IUnityContainer _container; public ScopeContainer(IUnityContainer container) { _container = container; } public object GetService(Type serviceType) { return _container.IsRegistered(serviceType) ? _container.Resolve(serviceType) : null; } public IEnumerable<object> GetServices(Type serviceType) { return _container.IsRegistered(serviceType) ? _container.ResolveAll(serviceType) : new List<object>(); } public void Dispose() { _container.Dispose(); } } public class IoCContainer : ScopeContainer, IDependencyResolver { public IoCContainer(IUnityContainer container) : base(container) { } public IDependencyScope BeginScope() { var child = _container.CreateChildContainer(); return new ScopeContainer(child); } } public class Global : HttpApplication { void Application_Start(object sender, EventArgs e) { RegisterRoutes(); ConfigureApi(GlobalConfiguration.Configuration); } void ConfigureApi(HttpConfiguration config) { var unity = new UnityContainer(); unity.RegisterInstance<ILogger>(new Logger()); unity.RegisterType<IRepository, DbRepository>(); config.DependencyResolver = new IoCContainer(unity); } private static void RegisterRoutes() { RouteTable.Routes.MapHttpRoute("ServiceApi", "api/{controller}/{action}"); } }

Answer 1

我认为这可能是您注册路线的方式。

WebApi路由通过GlobalConfiguration.Routes而不是MVC控制器使用的RouteTable.Routes在默认项目示例中注册。如果MVC路由方法错误地加载了ApiController，它将找不到依赖项解析器。

尝试将代码修改为：

public class Global : HttpApplication
{
    void Application_Start(object sender, EventArgs e)
    {
        RegisterRoutes(GlobalConfiguration.Configuration);
        ConfigureApi(GlobalConfiguration.Configuration);
    }

    void ConfigureApi(HttpConfiguration config)
    {
        var unity = new UnityContainer();

        unity.RegisterInstance<ILogger>(new Logger());
        unity.RegisterType<IRepository, DbRepository>();

        config.DependencyResolver = new IoCContainer(unity);
    } 

    private static void RegisterRoutes(HttpConfiguration config)
    {
        config.Routes.MapHttpRoute("ServiceApi", "api/{controller}/{action}");
    }

}

Answer 2

我遇到了同样的问题，我正在研究一个项目，试图通过逐页转换为Web API / Angular来帮助现代化旧的Web表单项目，并使得管道恰到好处地使用Unity是关键。

当我进行跟踪时，我注意到团结正在尝试解析控制器类，但不是要注入其构造函数的类型，所以我注册了我的控制器并且一切正常。请参阅下面的示例

配置设置，注册控制器和依赖

void ConfigureApi(HttpConfiguration config)
{
        var container = UnitySingleton.UnityContainer;
        container.RegisterType<IDashboardManager, ExampleStuff>();
        container.RegisterType<DashboardController>(new InjectionConstructor(container.Resolve<IDashboardManager>()));
        config.DependencyResolver = new UnityIoCContainer(container);
}

我的控制器示例：

public class DashboardController : ApiController
{
    private readonly IDashboardManager _dashboardManager;

    public DashboardController(IDashboardManager dashboardManager)
    {
        _dashboardManager = dashboardManager;
    }

    public async Task<IEnumerable<string>> Get()
    {
        return await _dashboardManager.GetDatas();
    }
}

这就是我的工作方式。这与上面的文章略有不同。

Unity注入asp.net web api控制器和过滤器

2 个答案: