应用关闭时复制文件 [英] Copy a file when App is closed

问题描述

我开发了一个在AppData /../ LocalState中使用SqLite数据库的UWP应用程序。到目前为止，缺少的是将数据库文件自动备份到用户定义的存储位置。

I developed a UWP app that uses a SqLite database in AppData/../LocalState. What is missing so far is an automatic backup of the database file to a user-defined storage location.

我想在应用程序终止时进行备份，以避免在应用程序中进行过多复制正在使用。我已经阅读了很多关于Suspend处理程序和可能的BackgroundTask来做到这一点，但我仍然不确定最佳解决方案是什么。可以
有人对此有所了解吗？是否有可能有这样的后台任务，也可以应对如下错误：存储位置是USB磁盘，但它不可用。我认为后台任务可以发出Toasts来提醒用户，但它真的可以
与用户交互吗？

I would like to do the backup when the app terminates to avoid excessive copying while the app is being used. I have read a lot about a Suspend handler and a possible BackgroundTask to do this but I am still not sure what the best solution would be. Can someone shed some light on this? Is it possible to have such a background tasks that also would cope with errors like: the storage location is a USB disk but it is not available. I think a background task can issue Toasts to alert the user, but can it really interact with the user?

推荐答案

您好， 

Hello, 

请阅读粘贴帖子，尤其是  发布指南：主题行
标签和don'忘记在你的问题中添加标签。

Please read the sticky posts, especially the Guide to posting: subject line tags, and don't forget add tag to your question.

暂停处理程序不是最好的地方，因为它限制了执行时间。进程外后台任务是最佳选择。您可以与用户购买吐司通知进行互动。

The suspension handler is not a best place because it has restriction for execution time. The out of process background task is the best choice. And you can interact with user buy toast notifications.

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