private void BroadcastMessage(ChatEventArgs e)
{
ChatEventHandler temp = ChatEvent;
if (temp != null)
{
//循环将在线的用户广播信息
foreach (ChatEventHandler handler in temp.GetInvocationList())
{
//异步方式调用多路广播委托的调用列表中的ChatEventHandler
handler.BeginInvoke(this, e, new AsyncCallback(EndAsync), null);
}
}
}
public void Leave()
{
if (this.name == null)
{
return;
}
lock (syncObj)
{
chatters.Remove(this.name);
}
ChatEvent -= myEventHandler;
ChatEventArgs e = new ChatEventArgs();
e.msgType = MessageType.UserLeave;
e.name = this.name;
this.name = null;
BroadcastMessage(e);
}
public void Whisper(string to, string msg)
{
ChatEventArgs e = new ChatEventArgs();
e.msgType = MessageType.ReceiveWhisper;
e.name = this.name;
e.message = msg;
try
{
ChatEventHandler chatterTo;//创建一个临时委托实例
lock (syncObj)
{
chatterTo = chatters[to]; //查找成员字典中，找到要接收者的委托调用
}
chatterTo.BeginInvoke(this, e, new AsyncCallback(EndAsync), null); //异步方式调用接收者的委托调用
}
catch (KeyNotFoundException)
{
}
}