在应用程序更新数据库升级 [英] Upgrading database on app update

问题描述

我正在开发，它使用Windows Store应用的适用于Windows运行时扩展SQLite的和源码网库将数据存储在本地SQLite数据库。该数据库在 Windows.Storage.ApplicationData.Current.LocalFolder.Path 路径创建。
一切工作像它应该和我猜submiting时候我会不会有问题。
搜索结果

I am developing a Windows Store App that uses SQLite for Windows Runtime Extension and sqlite-net library to store data in a local SQLite database. This database is created in Windows.Storage.ApplicationData.Current.LocalFolder.Path path. Everything works like it should and I guess I will not have problems when submiting.

但是，当我改变会发生什么应用程序，再次提交和用户更新呢？
就数据库文件被删除？将用户丢失了他的数据？

But what will happen when I change the app, submit again and the user updates it? Will database file be deleted? Will the user lost his data?

我是否可以使用旧的数据库和升级它的应用程序版本之间？

Will I be able to use the old database and upgrade it between app versions?

我知道如何开发Android应用程序时做的，但这个Windows应用商店的更新过程是新的给我，我怕做了一些错误，这使得我无法恢复用户的数据。如果有人通过它已经走了告诉我它是如何工作的吧。

I know how to do it when developing Android apps but this Windows Store Update process is new to me and I am afraid of doing some mistake that makes me unable to recover users data. If someone has already gone through it tell me how it works please.

的在此先感谢的

推荐答案

应用程序的数据在持续更新;如果用户卸载应用程序，将只被删除。从访问应用程序的数据与Windows运行时：

Application data persists over updates; it would only be deleted if the user uninstalled the application. From Accessing app data with the Windows Runtime:

系统管理数据存储为应用，确保他们远离其他的应用和其他用户隔离。当用户安装更新了自己的应用程序，当你的应用被卸载彻底，干净删除这些数据存储的内容，该系统还保留这些数据存储的内容。

The system manages the data stores for an app, ensuring that they are kept isolated from other apps and other users. The system also preserves the contents of these data stores when the user installs an update to your app and removes the contents of these data stores completely and cleanly when your app is uninstalled.

鉴于这种情况，你肯定将有机会获得他们的本地数据库的当前（旧）的版本，所以这将是由你在任何移民建/升级功能的应用程序的一部分。

Given that, you certainly would have access to the current (old) version of their local database, so it would be up to you to build in any migration/upgrade functionality as part of the app.

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