何时应该做以下事情？
class Foo : Control
{
protected override void OnClick(EventArgs e)
{
// new code here
}
}
与此相反？
class Foo : Control
{
public Foo()
{
this.Click += new EventHandler(Clicked);
}
private void Clicked(object sender,EventArgs e)
{
// code
}
}
解决方法
覆盖而不是附加代理将导致更有效的代码,因此通常建议您始终尽可能地执行此操作.有关更多信息,请参阅
this MSDN article.这是一个相关报价：
The protected OnEventName method also allows derived classes to override the event without attaching a delegate to it. A derived class must always call the OnEventName method of the base class to ensure that registered delegates receive the event.
