如何检测是否虚方法是在C＃重写 [英] How to detect if virtual method is overridden in c#

问题描述

是否有可能确定一个虚方法已被重写：

Is it possible to determine if a virtual method has been overridden:

class ABase {

  public void DoSomething(object p)
  {
    p.Process();
    if( /* DoSomethingExtra is implemented */ )
      DoSomethingExtra(p);
  }
  public virtual void DoSomethingExtra(object p) { }

}

class ADerived {
  public override void DoSomethingExtra(object p)
  {
    p.ProcessMore();
  }
}

我意识到，这个例子似乎是愚蠢的（如：你为什么不'T你只需要调用DoSomethingExtra（），因为它不会做任何事情）。我向你保证，我对这个合法的情况下。任何想法？

I realize that this example seems stupid (e.g. why don't you just call DoSomethingExtra() since it doesn't do anything). I assure you I have a legitimate case for this. Any ideas?

推荐答案

检查了这一点的如果检测的方法是使用反射（C＃）

反射将被覆盖只有这样，才能在运行时做到这一点。这应该有一个健康警告但是，它应被视为从面向对象的角度来看一个非常糟糕的主意（TM）。基类，一般不应知道也不关心如何派生类中实现。

Reflection would be the only way to do this at runtime. This should come with a health warning however, it should be considered a Very Bad Idea (tm) from an OOP perspective. A base class should not generally know or care how a derived class is implemented.

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