/// <summary>
/// 关闭已打开的bll instances
/// </summary>
private void CloseBlls()
{
TrackerPositionInstance.Close();
StorageInstance.Close();
PositionInstance.Close();
EquipmentInstance.Close();
EposInstance.Close();
DataInstance.Close();
DailyInstance.Close();
CustomerInstance.Close();
AlarmInstance.Close();
}