如何在我的ASP中其他地方获得IAppBuilder的实例。净MVC 5.2.3应用程序?

I need to build an Owin middle-ware object but not from within the Startup class. I need to build it from within anywhere else in my code, so I need a reference to the AppBuilder instance of the application. Is there a way to get that from anywhere else?

我需要构建一个Owin中间件对象，但不是在Startup类中。我需要从代码中的其他地方构建它，因此需要对应用程序的AppBuilder实例进行引用。有办法从其他地方得到吗?

1 个解决方案

#1

You could simply inject AppBuilder itself to OwinContext. But since Owin context only supports IDisposable object, wrap it in IDisposable object and register it.

您可以简单地将AppBuilder本身注入到OwinContext中。但是由于Owin上下文中只支持IDisposable object，将其封装在IDisposable object中并注册。

public class AppBuilderProvider : IDisposable
{
    private IAppBuilder _app;
    public AppBuilderProvider(IAppBuilder app)
    {
        _app = app;
    }
    public IAppBuilder Get() { return _app; }
    public void Dispose(){}
}

public class Startup
{
    // the startup method
    public void Configure(IAppBuilder app)
    {
        app.CreatePerOwinContext(() => new AppBuilderProvider(app));
        // another context registrations
    }
}

So in everywhere of your code you have access IAppBuilder object.

所以在代码的任何地方你都可以访问IAppBuilder对象。

public class FooController : Controller
{
    public ActionResult BarAction()
    {
        var app = HttpContext.GetOwinContext().Get<AppBuilderProvider>().Get();
        // rest of your code.        
    }
}

#1