储存的方法，一类在C＃中的一个成员变量 [英] Storing a Method as a Member Variable of a Class in C#

问题描述

我有这个作为我的类的成员之一的KeyEvent'：

I have this as one of my members of the class 'KeyEvent':

private delegate void eventmethod();

和构造器：

    public KeyEvent(eventmethod D) {
        D();
    }

我想要做的是不是调用D（）那里，我想来存储方法（D）作为KeyEvent的成员变量，所以是这样的：

What I want to do is instead of calling D() there, I want to store that method (D) as a member variable of KeyEvent, so something like:

stored_method = D();

再后来的KeyEvent另一种方法，这样做：

And then later in another method of KeyEvent, do something like:

stored_method();

我怎样才能做到这一点？谢谢

How can I do this? Thank you

推荐答案

您几乎已经代码。只要创建合适的委托类型的成员字段，并保存参数，它就像你会与任何其他数据类型。

You pretty much have the code already. Just create a member field of the right delegate type and save the parameter to it just like you would with any other data type.

private eventmethod MySavedEvent;

public void KeyEvent(eventmethod D) {
    // Save the delegate
    MySavedEvent = D;
}

public void CallSavedEvent() {
    if (MySavedEvent != null) {
        MySavedEvent();
    }
}

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