有什么方法可以在我的课程中订阅某个事件时收到通知,或者我是否需要在方法中包含订阅/取消订阅,例如：
public class MyClass : ISomeInterface
{
public event SomeEventHandler SomeEvent; //How do I know when something subscribes?
private void OnSomeEventSubscription(SomeEventHandler handler)
{
//do some work
}
private void OnSomeEventUnsubscription(SomeEventHandler handler)
{
//do some work
}
}
代替
public class MyClass : ISomeInterface
{
private SomeEventHandler _someEvent;
public void SubscribeToSomeEvent(SomeEventHandler handler)
{
_someEvent += handler;
//do some work
}
public void UnsubscribeFromSomeEvent(SomeEventHandler handler)
{
_someEvent -= handler;
//do some work
}
}
解决方法
您可以为您的活动编写自定义访问者：
private SomeEventHandler _someEvent;
public event SomeEventHandler SomeEvent
{
add
{
_someEvent += value;
Console.WriteLine("Someone subscribed to SomeEvent");
}
remove
{
_someEvent -= value;
Console.WriteLine("Someone unsubscribed from SomeEvent");
}
}
