/// <summary>
 /// 通话结束事件回调函数
 /// </summary>
 /// <param name="para"></param>
 public void UCAVSessionClosed(STMsgAVSessionClosedParam para)
 {
     LogManager.SystemLog.Debug("UCAVSessionClosed");
     this.isConnected = false;   //modify by jinyeqing 2015/6/8
     Dispatcher.BeginInvoke(new Action(() =>
     {
         if (winCall != null)
         {
             winCall.Close();
         }             
         if (receive != null)
         {
             receive.Close();
         }
     }));
     if (timer != null && timer.Enabled)
     {
         timer.Enabled = false;
     }
     i = 0;   //modify by 00327190   2015/6/23  将i置为0,这样就会避免第二次之后的设置Video图片失败   (654行)
 }
 static void AVSessionClosedCBMethod(ref STMsgAVSessionClosedParam _avParam)
 {
     if (AVSessionClosed != null)
     {
         AVSessionClosed(_avParam);
     }
 }