private void UnSubscribeInternal <TEventArgs>(ContractInfo contract, ChannelConnectionEventType eventType, EventHandler <TEventArgs> callback)
where TEventArgs : EventArgs
{
if (callback == null)
{
throw new ArgumentNullException("callback");
}
switch (eventType)
{
case ChannelConnectionEventType.Connected:
List <EventHandler <ChannelConnectedEventArgs> > connectedListeners;
if (_channelConnectedEventSubscribers.TryGetValue(contract.Key, out connectedListeners))
{
connectedListeners.Remove(callback as EventHandler <ChannelConnectedEventArgs>);
}
break;
case ChannelConnectionEventType.Reconnected:
List <EventHandler <ChannelConnectedEventArgs> > reconnectedListeners;
if (_channelReconnectedEventSubscribers.TryGetValue(contract.Key, out reconnectedListeners))
{
reconnectedListeners.Remove(callback as EventHandler <ChannelConnectedEventArgs>);
}
break;
case ChannelConnectionEventType.Disconnected:
List <EventHandler <ChannelDisconnectedEventArgs> > disconnectedListeners;
if (_channelDisconnectedEventSubscribers.TryGetValue(contract.Key, out disconnectedListeners))
{
disconnectedListeners.Remove(callback as EventHandler <ChannelDisconnectedEventArgs>);
}
break;
case ChannelConnectionEventType.ExceptionRaised:
List <EventHandler <ChannelExceptionRaisedEventArgs> > exceptionRaisedListeners;
if (_channelExceptionRaisedEventSubscribers.TryGetValue(contract.Key, out exceptionRaisedListeners))
{
exceptionRaisedListeners.Remove(callback as EventHandler <ChannelExceptionRaisedEventArgs>);
}
break;
}
}
/// <summary>
/// 取消订阅通道连接状态事件
/// </summary>
/// <typeparam name="TContract">需要订阅的服务契约</typeparam>
/// <typeparam name="TEventArgs">订阅通道状态参数类型</typeparam>
/// <param name="eventType">通道状态类型</param>
/// <param name="callback">通道状态变化回调函数</param>
public void Unsubscribe <TContract, TEventArgs>(ChannelConnectionEventType eventType, EventHandler <TEventArgs> callback)
where TContract : class
where TEventArgs : EventArgs
{
UnSubscribeInternal <TEventArgs>(new ContractInfo(typeof(TContract)), eventType, callback);
}