拦截Ninject.无法加载IProxyRequestFactory

Question

我正在学习使用Ninject和Interceptor模式.

我有以下拦截器.

public class MyInterceptor:IInterceptor
{
    public void Intercept(IInvocation invocation)
    {
        Console.WriteLine("Pre Execute: " + invocation.Request.Method.Name);

        foreach (var param in invocation.Request.Arguments)
        {
            Console.WriteLine("param : " + param);
        }

        invocation.Proceed();

        Console.WriteLine("Post Execute: " + invocation.Request.Method.Name);
        Console.WriteLine("Returned: " + invocation.ReturnValue);
    }
}

并且有一个名为MyClass只有2个简单方法的类,虚拟允许拦截器处理它们.(两种方法是Echo和double,这就像他们的名字所说的那样.)

我通过NuGet将Ninject,Ninject.Extensions.Interception和Ninject.Extensions.Interception.DynamicProxy添加到我的项目中.

添加以下using声明.

using Ninject;
using Ninject.Extensions.Interception.Infrastructure.Language;
using Ninject.Extensions.Interception;

我的Main方法,它执行引导看起来像这样.

static void Main(string[] args)
    {
        MyClass o = null;

        using (IKernel kernel = new StandardKernel())
        {

            kernel.Bind<MyClass>().ToSelf().Intercept().With(new MyInterceptor());
            o = kernel.Get<MyClass>();
        }

        o.Echo("Hello World!"); // Error
        o.Double(5);
    }

我在指定的行收到以下错误.

Error loading Ninject component IProxyRequestFactory
No such component has been registered in the kernel's component container.

Suggestions:
  1) If you have created a custom subclass for KernelBase, ensure that you have  properly
     implemented the AddComponents() method.
  2) Ensure that you have not removed the component from the container via a call to RemoveAll().
  3) Ensure you have not accidentally created more than one kernel..

谁能告诉我我做错了什么？

Answer 1

好的,我终于能够重现(忘了让MyClass方法虚拟).我解决它的方法是从内核周围删除using块:

    static void Main(string[] args)
    {
        MyClass o = null;

        var kernel = new StandardKernel();
        kernel.Bind<MyClass>().ToSelf().Intercept().With(new MyInterceptor());
        o = kernel.Get<MyClass>();

        o.Echo("Hello World!"); // Error
        o.Double(5);
        Console.ReadKey(true);
    }

我猜测这个工作的原因是因为它在封面下创建了一个代理类,MyClass并以某种方式传递IKernel给代理.当您调用该方法(在代理上)时,它会返回到内核并解析一些其他依赖项(包括IProxyRequestFactory).由于您正在处理它,它不再能够解决该依赖关系.