如果你有同一个类的不同实例,例如’FootballTeam’,你想让这个FootballTeam类的另一个实例知道发生了什么,那么最好的方法是什么？
事件不会真正起作用我猜…
例如：
FootballTeam A = new FootballTeam(); FootballTeam B = new FootballTeam(); // now A needs to let B know about it's manager change // manager is a property inside this class...
解决方法
事件可能有效：
FootballTeam A = new FootballTeam(); FootballTeam B = new FootballTeam(); A.ManagerChanged += B.OnOtherManagerChanged;
事件的定义 – 当Football Manager的Manager属性更改值时,它会调用其OnManagerChanged方法：
class FootballTeam
{
public event EventHandler ManagerChanged;
protected virtual void OnManagerChanged(EventArgs e)
{
EventHandler handler = ManagerChanged;
if (handler != null)
handler(this,e);
}
public void OnOtherManagerChanged(object sender,EventArgs e)
{
FootballTeam otherTeam = (FootballTeam) sender;
// A manager changed on a different FootballTeam instance
// ...do something here
}
}
