asp.net-mvc-4 - HttpContextBase 如何向 ninject 注册？我没有明确绑定(bind)它

Question

我在 NinjectWebCommon.RegisterServices 方法中创建了 HttpContextBase 的绑定(bind)，但是当我尝试在 Controller 或服务中引用它时，我收到一条错误消息。

这是绑定(bind):

kernel.Bind<HttpContextBase>().ToMethod(context => new HttpContextWrapper(HttpContext.Current)).InRequestScope();

错误消息如下:

Error activating HttpContextBase
More than one matching bindings are available.
Activation path:
 2) Injection of dependency HttpContextBase into parameter abase of constructor of type HomeController
 1) Request for HomeController

Suggestions:
 1) Ensure that you have defined a binding for HttpContextBase only once.

如果我删除绑定(bind)，那么它似乎会执行我想要的操作(解析为 HttpContextWrapper)，但我想知道它是如何注册的？

Answer 1

but I'm wondering how this gets registered?

看MvcModule.cs的源码您的问题将立即得到解答:

this.Kernel.Bind<HttpContext>().ToMethod(ctx => HttpContext.Current).InTransientScope();
this.Kernel.Bind<HttpContextBase>().ToMethod(ctx => new HttpContextWrapper(HttpContext.Current)).InTransientScope();