Dependency injection 将Unity挂钩到WebAPI过滤器属性中
我的ASP.NET Web API项目中所有控制器的Unity都运行得非常好,只需使用NuGet框中的默认设置即可。我还成功地将它连接到MVC过滤器属性上,但对于ASP.NET Web API过滤器属性似乎做不到这一点 如何扩展此默认实现以将依赖项注入ActionFilterAttribute,例如Dependency injection 将Unity挂钩到WebAPI过滤器属性中,dependency-injection,asp.net-web-api,unity-container,Dependency Injection,Asp.net Web Api,Unity Container,我的ASP.NET Web API项目中所有控制器的Unity都运行得非常好,只需使用NuGet框中的默认设置即可。我还成功地将它连接到MVC过滤器属性上,但对于ASP.NET Web API过滤器属性似乎做不到这一点 如何扩展此默认实现以将依赖项注入ActionFilterAttribute,例如 public class BasicAuthenticationAttribute : ActionFilterAttribute { [Dependency] public IMy
public class BasicAuthenticationAttribute : ActionFilterAttribute
{
[Dependency]
public IMyService myService { get; set; }
public BasicAuthenticationAttribute()
{
}
}
此过滤器应用于使用以下属性的控制器:
[BasicAuthentication]
我非常确定我需要连接Unity容器,以便它处理属性类的创建,但是需要一些关于从何处开始的线索,因为它没有使用与MVC过滤器相同的扩展点
我只是想补充一下,我尝试过的其他事情包括服务位置,而不是依赖注入,但是您得到的DependencyResolver与您配置的不一样
// null
var service = actionContext.Request.GetDependencyScope().GetService(typeof(IMyService));
或
问题在于属性类是由.NET创建的,而不是由WebAPI框架创建的 在进一步阅读之前,您是否忘记使用IApiUserService配置DependencyResolver
(IUnityContainer)container;
container.RegisterType<IApiUserService, MyApiUserServiceImpl>();
...
var service = GlobalConfiguration.Configuration.DependencyResolver.GetService(typeof(IApiUserService));
我已经从你的答案中找到了静态方法的概念,它是有效的。感觉有点不对劲,但考虑到我找不到其他方法,我会接受的:)-谢谢!我使用静态工厂的唯一原因是,在注册UnityContainer之后,我找不到从WebAPI获取UnityContainer的方法。但这没什么问题。你不想为每个请求或每次请求都创建新的容器,所以我相信该模式是有效的。我同意-我想重复使用同一个容器,但我希望能够在过滤器属性上方的一层上实现这一点。这是我唯一不满意的一点——不是重复使用同一个容器
(IUnityContainer)container;
container.RegisterType<IApiUserService, MyApiUserServiceImpl>();
...
var service = GlobalConfiguration.Configuration.DependencyResolver.GetService(typeof(IApiUserService));
public class UnityConfig {
#region Unity Container
private static Lazy<IUnityContainer> container = new Lazy<IUnityContainer>(() => {
var container = new UnityContainer();
RegisterTypes(container);
return container;
});
/// <summary>
/// Gets the configured Unity container.
/// </summary>
public static IUnityContainer GetConfiguredContainer() {
return container.Value;
}
#endregion
public static void Configure(HttpConfiguration config) {
config.DependencyResolver = new UnityDependencyResolver(UnityConfig.GetConfiguredContainer());
}
/// <summary>Registers the type mappings with the Unity container.</summary>
/// <param name="container">The unity container to configure.</param>
/// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to
/// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
private static void RegisterTypes(IUnityContainer container) {
// NOTE: To load from web.config uncomment the line below. Make sure to add a Microsoft.Practices.Unity.Configuration to the using statements.
// container.LoadConfiguration();
// TODO: Register your types here
// container.RegisterType<IProductRepository, ProductRepository>();
container.RegisterType<MyClass>(new PerRequestLifetimeManager(), new InjectionConstructor("connectionStringName"));
}
}
config.Filters.Add(new MyFilterAttribute(UnityConfig.GetConfiguredContainer()));