/*
* Step 4. Event source owned the event，so should define an event trigger method inside the event source,
* So please don't forget to generate an action to trigger event
* 第四步. 事件要能发送消息，请别忘了在事件拥有者中建一个方法用于事件触发
*/
public void EventSourceAction4TriggerEvent()
{
// Before you do something make sure the event handler existed!
if (this.delegateEventHandler != null)
{
// Pass event parameters，we will generate Event Args properties class at Step 7
// 传入事件参数，当然现在还没有Event args的属性类，我们将在第7步定义一个Event参数属性类
EventNameEventArgs e = new EventNameEventArgs();
e.FirstArgs = "You deal wiht 1st args";
e.SecondArgs = "You deal with 2nd args";
// Event handler invoke.
// 利用事件处理器调用。
this.delegateEventHandler.Invoke(this, e);
}
}
public void Action(HereIsEventSource eventSource, EventNameEventArgs e)
{
System.Console.WriteLine("do something!");
}
// Due to subscribe event via delegate, so the method's signature must same as eventhandler delegate
// - eventSource tells EventSubscriber do for which Event Source
// - e tells EventSubscriber the action should base on which parameters
public void SubscriberDoSomthing(HereIsEventSource eventSource, EventNameEventArgs e)
{
System.Console.WriteLine($"Event Suberscriber do something after Event source trigger the event!");
System.Console.WriteLine($"Do something with 1st agrs of EventNameEventArgs: {e.FirstArgs} ");
System.Console.WriteLine($"Do something with 2nd agrs of EventNameEventArgs: {e.SecondArgs} ");
}