实际上我认为我找到了答案.在轮询例程中，我需要在服务控制器上调用refresh方法，以确保刷新状态，否则无论最后的状态如何，它都保持不变.

谢谢
雷

Actually I think I found the answer. In the polling routine I needed to call the refresh method on the service controller to make sure the status refreshed otherwise it remained whatever the last status was.

Thanks
Ray