如何知道Pull订阅已过期？ [英] How to know that a Pull Subscription got expired?

问题描述

我正在使用PullSubscription来获取有关新邮件的通知。但是在创建它时我们还必须指定超时，如果服务器未在超时限制内轮询，则订阅将结束。

I am using PullSubscription to get the notification about new mail. But while creating it we have to specify a timeout also, the subscription will end if the server is not polled within the timeout limit.

PullSubscription < span style ="font-size：8.0pt; font-family：'Courier New'"> subscription = service.SubscribeToPullNotifications（

new FolderId [] { WellKnownFolderName .Inbox}，

new FolderId[] { WellKnownFolderName.Inbox },

5 / * timeOut ：如果服务器未在5分钟内轮询，则订阅将结束。 * / ，

null / * watermark：null以启动新订阅。 * / ，

null /* watermark: null to start a new subscription. */,

EventType .NewMail， EventType .Created， EventType .Deleted）;

EventType.NewMail, EventType.Created, EventType.Deleted);

 

我的问题是，如果订阅过期或结束，我怎么知道它以便我可以重新开始订阅？ 

My question is that, if a subscription got expired or ended, how would I know it so that I can restart the subscription? 

推荐答案

如果订阅已过期，则在为该订阅调用GetEvents时将收到错误消息。这表示您必须再次订阅。

If a subscription has expired, you will get an error message when you call GetEvents for that subscription. That will be an indication that you have to subscribe again.

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