循环代表

Question

我想知道C＃如何解释这段代码。

    public delegate void ChangeStateHandler(object sender, EventArgs e);
    public event ChangeStateHandler ChangeStateEvent = delegate { };

    protected void OnChangeState(EventArgs e) {
        ChangeStateHandler ev = ChangeStateEvent;

        ev(this, e);   // <<<<< that LINE
    }

我知道这部分转化为：

private EventHandlerList events = new EventHandlerList();  
    private Object myeventObject = new object();  
    public event EventHandler<EventArgs> myevent  
    {  
        add { events.AddHandler(myeventObject, value); }  
        remove { events.RemoveHandler(myeventObject, value); }  
    }  

在“现实”中ev（this，e）如何翻译？ 我想这样的事情：

ChangeStateHandler ev = ChangeStateEvent;
foreach (myHandler in ev) {
     myHandler(this, e);
}

但是，单个函数（ev）如何生成循环？如何实现类似的东西？

干杯

Answer 1

关闭 - 语义类似于：

foreach (ChangeStateHandler myHandler in ev.GetInvocationList()) {
     myHandler(this, e);
}