为什么C＃不支持base.base？ [英] Why C# doesn't support base.base?

问题描述

我测试code是这样的：

I tested code like this:

class A
{
    public A() { }

    public virtual void Test ()
    {
        Console.WriteLine("I am A!");
    }
}

class B : A
{
    public B() { }

    public override void Test()
    {
        Console.WriteLine("I am B!");
        base.Test();
    }
}

class C : B
{
    public C() { }

    public override void Test()
    {
        Console.WriteLine("I am C!");
        base.base.test(); //I want to display here "I am A"
    }
}

和试图从A类（祖父母的方法）的C法测试呼叫。但它不工作。请告诉我一个方法来调用祖父母虚方法。

And tried to call from C method Test of A class (grandparent's method). But It doesn't work. Please, tell me a way to call a grandparent virtual method.

推荐答案

您不能 - 因为它会破坏封装。如果B类要强制执行的某种不变的（或其他）的测试这将是pretty的严峻，如果C类可能只是绕过它。

You can't - because it would violate encapsulation. If class B wants to enforce some sort of invariant (or whatever) on Test it would be pretty grim if class C could just bypass it.

如果你发现自己想这样，你应该问你的设计 - 也许你的继承关系中至少有一个是不恰当的？ （我亲自尝试，有利于组成了继承下手，但是这是一个单独的讨论。）

If you find yourself wanting this, you should question your design - perhaps at least one of your inheritance relationships is inappropriate? (I personally try to favour composition over inheritance to start with, but that's a separate discussion.)

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