Windows Phone 7 中部分完成的文本框和逻辑删除
当我使用 TwoWay 数据绑定到页面上的视图模型时，根据我的观察，视图模型仅在焦点离开字段（例如文本框）时更新。此行为与更新数据中的描述相符来源。
如果应用程序被逻辑删除，那么我见过的大多数示例只是将视图模型保留在页面状态，并在再次激活时重新加载它们。
据我所知，这意味着如果用户没有导致焦点从他们正在编辑的文本框中丢失，则当前值不会复制到视图模型，因此不会保存。
这是用户（以及 Microsoft 的应用程序认证流程）对 WP7 应用程序的期望吗？
When I use TwoWay data binding to a view model on a page, then from what I have observed, the view model is only updated when the focus leaves the field (eg. a TextBox). This behaviour matches the description in Updating the Data Source.
If the application is tombstoned, then most examples I've seen just persist the view model in the page state, and reload them if it is activated again.
From what I can see, this means that if the user hadn't caused focus to be lost from the text box they were editing, the current value isn't copied to the view model, and so it isn't saved.
Is that what a user (and also Microsoft's Application Certification process) would expect from a WP7 application?
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跨逻辑删除保存部分输入的文本并不是市场验收测试的要求。
但是，如果数据在应用程序上下文中有意义，那么您应该保留数据，这样才能提供最佳的用户体验。
不要将您的应用程序体验建立在框架将数据同步到视图模型的方式上。做对用户最有利的事情。
如果应用程序保存此信息有意义，那么作为用户，我会希望它保存，并且我不会关心您给出的不这样做的任何技术原因。
Saving partially entered text across tombstoning isn't a requirement for marketplace acceptance testing.
However, you should persist the data if it makes sense in the context of the application and that is what would give the best user experience.
DO NOT base your application experience on the way the framework synchronises data to a view model. Do what's best for the user.
If it made sense for the application to save this information, as a user, I would want it to and I woudn't care for whatever technical reason you gave for not doing this.