/// <summary> /// Constructor for the Application object. /// </summary> 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 disables user idle detection will continue to run // and consume battery power when the user is not using the phone. PhoneApplicationService.Current.UserIdleDetectionMode = IdleDetectionMode.Disabled; } #region Developer // Create the database if it does not exist. using (ToDoDataContext db = new ToDoDataContext(DBConnectionString)) { if (db.DatabaseExists() == false) { // Create the local database. db.CreateDatabase(); //db.AllItems.InsertOnSubmit(new ToDoItem() { ItemName = "AA测试", IsComplete = false }); //db.SubmitChanges(); } } // Create the ViewModel object. viewModel = new ToDoViewModel(DBConnectionString); // Query the local database and load observable collections. viewModel.LoadCollectionsFromDatabase(); #endregion }
// 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) { using (ToDoDataContext db = new ToDoDataContext(DBConnectionString)) { if (db.DatabaseExists()) db.DeleteDatabase(); } }
// Class constructor, create the data context object. public ToDoViewModel(string toDoDBConnectionString) { Context = new ToDoDataContext(toDoDBConnectionString); }