//发布事件
public void OnMarriageComing(string msg)
{
if (MarryEvent != null)
{
MarryEvent.Invoke(msg);
}
}
public event EventHandler MarryEvent; // II. 用.NET类库中预定义的委托类型EventHandler来定义事件
// 5. 调用委托变量，发出事件（消息发出者）
public void OnMarriageComing(string msg)
{
//MarryEvent?.Invoke(msg);
//MarryEvent?.Invoke(this, new EventArgs()); // II. 用.NET类库中预定义的委托类型EventHandler来定义事件
MarryEvent?.Invoke(msg, new EventArgs()); // II. 也可以把sender换成msg，用来传递数据，不过一般都是用new EventArgs()传递数据，见下一个例子
}
public virtual void BeMarried(People people)
{
MarryArgs e = new MarryArgs
{
T = people
};
if (PreviousMate.Count == 0 && CurrentMate.Count == 1 && people.PreviousMate.Count == 0 && people.CurrentMate.Count == 1 && CurrentMate[CurrentMate.Count - 1] == people)
{
e.Tip = "从一而终，矢志不渝！";
MarryEvent?.Invoke(this, e);
}
else
{
var curIndex = CurrentMate.FindIndex((t) => t.Equals(people));
var preIndex = PreviousMate.FindIndex((t) => t.Equals(people));
if (curIndex == -1 && preIndex == -1)
{
e.Tip = "我结婚了，新郎（娘）不是他！";
MarryEvent?.Invoke(this, e);
}
else if (curIndex == CurrentMate.Count - 1)
{
e.Tip = "执子之手，与子偕老！";
MarryEvent?.Invoke(this, e);
}
else if (preIndex != -1 || curIndex != -1)
{
e.Tip = "破镜也能重圆！";
MarryEvent?.Invoke(this, e);
}
}
Couple = people;
people.Couple = this;
}
// 5. 调用委托，激活事件（消息发出者，事件发布者）发出通知
public void OnBirthdayCom(string msg)
{
MarryEvent?.Invoke(this, new MarryEventArgs(msg));
}
