如何在windows phone中存儲應用程序狀態

Question

我有一個應用程序，當我打開它一次就完全正常工作，但現在的問題是，如果用戶點擊Windows Home鍵，它退出應用程序並將我的應用程序移到背景。現在，如果用戶長按回車鍵並打開我的應用程序，它將返回到用戶點擊主鍵的同一頁面。但是，如果用戶點擊應用程序圖標，我的應用程序從一開始就開始，我不想要。請幫幫我。謝謝

告訴我，我應該在哪裏放置代碼，以便得到期望的結果。

我的App.xaml低於： =================

namespace MyProj 
{ 
    /// <summary> 
    /// Interaction logic for App.xaml 
    /// </summary> 
    public partial class App : Application 
    { 

     // Easy access to the root frame 
     public PhoneApplicationFrame RootFrame 
     { 
      get; 
      private set; 
     } 

     // Constructor 
     public App() 
     { 
      // Global handler for uncaught exceptions. 
      UnhandledException += Application_UnhandledException; 

      // Standard Silverlight initialization 
      InitializeComponent(); 

      // Phone-specific initialization 
      InitializePhoneApplication(); 


      // Show graphics profiling information while debugging. 
      if (System.Diagnostics.Debugger.IsAttached) 
      { 
       // Display the current frame rate counters. 
       Application.Current.Host.Settings.EnableFrameRateCounter = true; 

       // Show the areas of the app that are being redrawn in each frame. 
       //Application.Current.Host.Settings.EnableRedrawRegions = true; 

       // Enable non-production analysis visualization mode, 
       // which shows areas of a page that are handed off to GPU with a colored overlay. 
       //Application.Current.Host.Settings.EnableCacheVisualization = true; 

       // Disable the application idle detection by setting the UserIdleDetectionMode property of the 
       // application's PhoneApplicationService object to Disabled. 
       // Caution:- Use this under debug mode only. Application that disable user idle detection will continue to run 
       // and consume battery power when the user is not using the phone. 
       PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled; 
      } 

     } 

     // 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) 
     { 
      // Restart session 

     } 

     // 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) 
     { 
      ViewModelLocator.Cleanup(); 
     } 

     // Code to execute if a navigation fails 
     private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e) 
     { 
      if (System.Diagnostics.Debugger.IsAttached) 
      { 
       // A navigation has failed; break into the debugger 
       System.Diagnostics.Debugger.Break(); 
      } 
     } 

     // Code to execute on Unhandled Exceptions 
     private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e) 
     { 
      if (System.Diagnostics.Debugger.IsAttached) 
      { 
       // An unhandled exception has occurred; break into the debugger 
       System.Diagnostics.Debugger.Break(); 
      } 
     } 

     #region Phone application initialization 

     // Avoid double-initialization 
     private bool phoneApplicationInitialized = false; 

     // Do not add any additional code to this method 
     private void InitializePhoneApplication() 
     { 
      if (phoneApplicationInitialized) 
       return; 

      // Create the frame but don't set it as RootVisual yet; this allows the splash 
      // screen to remain active until the application is ready to render. 
      //RootFrame = new PhoneApplicationFrame(); 
      RootFrame = new TransitionFrame(); 
      RootFrame.Navigated += CompleteInitializePhoneApplication; 

      // Handle navigation failures 
      RootFrame.NavigationFailed += RootFrame_NavigationFailed; 

      // Ensure we don't initialize again 
      phoneApplicationInitialized = true; 
     } 

     // Do not add any additional code to this method 
     private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e) 
     { 
      // Set the root visual to allow the application to render 
      if (RootVisual != RootFrame) 
       RootVisual = RootFrame; 

      // Remove this handler since it is no longer needed 
      RootFrame.Navigated -= CompleteInitializePhoneApplication; 
     } 

     #endregion 
    } 
} 

Answer 1

您需要實現墓碑的功能。剛看完
App activation and deactivation for Windows Phone