Windows Phone应用程序停用检测页面

Question

我正在使用Windows Phone。当我的应用程序停用并进入后台时，我想检测OnNavigatedFrom事件上的应用程序停用，以便在应用程序进入后台时实现一些逻辑。我怎样才能做到这一点？？？？？

Answer 1

使用下列方法（在App.xaml.cs文件中）时，应用程序被激活或去激活来执行逻辑：

// Code to execute when the application is launching (eg, from Start) 
// This code will not execute when the application is reactivated 
private void Application_Launching(object sender, LaunchingEventArgs e) 
{ 

} 

// Code to execute when the application is activated (brought to foreground) 
// This code will not execute when the application is first launched 
private void Application_Activated(object sender, ActivatedEventArgs e) 
{ 

} 

// Code to execute when the application is deactivated (sent to background) 
// This code will not execute when the application is closing 
private void Application_Deactivated(object sender, DeactivatedEventArgs e) 
{ 

} 

// Code to execute when the application is closing (eg, user hit Back) 
// This code will not execute when the application is deactivated 
private void Application_Closing(object sender, ClosingEventArgs e) 
{ 

} 

Answer 2

我找到了解决自己。将处理程序附加到您导航的页面上的PhoneApplicationService.Current.Deactivated事件。

Answer 3

您可以保存从APP事件或页面事件中停用的时间，并将其存储在IsolatedStorage中，然后在您的应用重新激活时（OnNavigatedTo）检索数据。