//内部实现
private bool OnListenerAdding(string eventType, Delegate handler, bool isDesignateRemove, EventDispatcherMode eventDispatcherMode)
{
//返回值，是否插入成功
bool isSuccess = false;
//获取建立监听的对象
object listenerObject = GetListenerObject(handler);
if (listenerObject != null && eventType != null)
{
//判断是否有该类型事件
if (!EventSubscription_Table.ContainsKey(eventType))
{
EventSubscription_Table.Add(eventType, new Hashtable());
if (isDesignateRemove && !designateRemoveEventLst.Contains(eventType))
{
designateRemoveEventLst.Add(eventType);
}
}
//添加事件的监听
Hashtable event_table = EventSubscription_Table[eventType] as Hashtable;
//创建一个事件监听的相关数据对象
EventListenerData eventListenerData = new EventListenerData(listenerObject, eventType, handler, eventDispatcherMode);
//转化为字符串
string eventListenerData_string = EventListenerData_To_String(eventListenerData);
//判断该事件是否有这个类中这个函数的监听
if (!event_table.Contains(eventListenerData_string))
{
event_table.Add(eventListenerData_string, eventListenerData);
isSuccess = true;
}
}
return(isSuccess);
}
//接口，判断是否有该监听
public bool HasEventListener(string eventType, Delegate handler)
{
//返回结果
bool isSuccess = false;
//获取建立监听的对象
object listenerObject = GetListenerObject(handler);
//外层
if (EventSubscription_Table.ContainsKey(eventType))
{
//内层
Hashtable event_table = EventSubscription_Table[eventType] as Hashtable;
EventListenerData eventListenerData = new EventListenerData(listenerObject, eventType, handler, EventDispatcherMode.DEFAULT);
string eventListenerData_string = EventListenerData_To_String(eventListenerData);
//
if (event_table.Contains(eventListenerData_string))
{
isSuccess = true;
}
}
return(isSuccess);
}
//一个事件监听的相关数据对象转化为字符串，作为第二层table的键值
private string EventListenerData_To_String(EventListenerData aEventListenerData)
{
return(aEventListenerData.EventListener.GetType().FullName + "_" + aEventListenerData.EventListener.GetType().GUID + "_" + aEventListenerData.EventName + "_" + (aEventListenerData.EventDelegate as System.Delegate).Method.Name.ToString());
}