C＃设置闹钟的简单事件处理程序 [英] C# Simple Event Handler for Setting Alarm

问题描述

为什么以下行alarm.AlarmEvent + = new AlarmEventHandler（alarm_Sound）;给我非静态字段，方法或属性需要对象引用AlarmClock.Alarm.alarm_Sound（object，System.EventArgs）'

Why does the following line "alarm.AlarmEvent += new AlarmEventHandler(alarm_Sound);" gives me "An object reference is required for the non-static field, method, or property 'AlarmClock.Alarm.alarm_Sound(object, System.EventArgs)'"

   public static void Main(string[] args)
    {
        Alarm alarm = new Alarm(new DateTime(2010, 4, 7, 23, 2, 0));
        alarm.Set();
        alarm.AlarmEvent += new AlarmEventHandler(alarm_Sound);            
    }

完整的源代码在这里：
Program.cs
AlarmEventArgs

Full source code here: Program.cs AlarmEventArgs

推荐答案

您正在添加事件调用 Set 方法后的处理程序。

因此，当 Set 方法引发事件时，它没有处理程序。

You're adding the event handler after calling the Set method.
Therefore, when the Set method raises the event, it doesn't have a handler yet.

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