Ninject:从相同抽象类继承的GetAll实例 [英] Ninject: GetAll instances that inherit from the same abstract class

问题描述

Ninject是否有可能获得从特定抽象类继承的所有实例?例如，我有以下抽象类.

Is it possible for Ninject to get all instances that inherit from a specific Abstract Class? For example, I have the following Abstract Class.

public abstract class MyAbstractClass { }

然后，我有以下两个派生类，它们都从同一个抽象类继承.

Then I have the following two derived classes that both inherit from the same abstract class.

public class MyDerivedClass1 : MyAbstractClass { }

public class MyDerivedClass2 : MyAbstractClass { }

现在，我要将两个派生类与内核绑定，因为我希望它们都处于单例范围内.

Now I am going to bind both derived classes with the Kernel because I want them to be in singleton scope.

_kernel = new StandardKernel();
_kernel.Bind<MyDerivedClass1>().ToSelf().InSingletonScope();
_kernel.Bind<MyDerivedClass2>().ToSelf().InSingletonScope();

我知道内核可以为我返回一个如下所示的实例.

I know the Kernel can return me an instance like the following.

_kernel.Get<MyDerivedClass1>();

是否有一种方法可以获取所有继承自MyAbstractClass的类?我尝试了以下方法，但均未成功.

Is there a way to get all of the classes that inherit from MyAbstractClass? I tried the following without success.

IEnumerable<MyAbstractClass> items = kernel.GetAll<MyAbstractClass>();

希望上面的GetAll()方法将返回两个实例的列表，一个实例是MyDerivedClass1，第二个实例是MyDerivedClass2.

The hope was that the above GetAll() method would return a list of two instances, one would be MyDerivedClass1 and the second would be MyDerivedClass2.

推荐答案

而不是创建两个绑定，第二个绑定具有重定向"到第一个绑定，您还可以执行以下操作:

instead of creating two bindings, the second one with a "redirect" to the first, what you can also do is:

_kernel.Bind<MyAbstractClass, MyDerivedClass1>()
       .To<MyDerivedClass1>().InSingletonScope();
_kernel.Bind<MyAbstractClass, MyDerivedClass2>()
       .To<MyDerivedClass1>().InSingletonScope();

这更清楚地表达了意图.

This expresses the intention more clearly.

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