private async void Place_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) { DataPeopleHelper placeHelper = new DataPeopleHelper("places.json"); placeHelper.WriteToFile(new ObservableCollection <Place>() { new Place() { Name = "Karlstad" } }); }
/// <summary> /// Invoked when the application is launched normally by the end user. Other entry points /// will be used such as when the application is launched to open a specific file. /// </summary> /// <param name="e">Details about the launch request and process.</param> protected async override void OnLaunched(LaunchActivatedEventArgs e) { Frame rootFrame = Window.Current.Content as Frame; DataPeopleHelper helper = new DataPeopleHelper("people.json"); People = await helper.ReadFromFile <ObservableCollection <Person> >(); DataPeopleHelper stringHelper = new DataPeopleHelper("places.json"); ObservableCollection <Place> myPlaces = await stringHelper.ReadFromFile <ObservableCollection <Place> >(); if (People == null) { People = new ObservableCollection <Person>() { new Person() { Name = "", Age = -1 }, new Person() { Name = "Robert", Age = 32 }, new Person() { Name = "Winston", Age = 30 }, new Person() { Name = "Leonard", Age = 40 } }; } // or // do the following //People = new ObservableCollection<Person>() //{ // new Person() { Name="", Age=-1 }, // new Person() { Name="Robert", Age=32 }, // new Person() { Name="Winston", Age=30 }, // new Person() { Name="Leonard", Age=40 } //}; People.CollectionChanged += People_CollectionChanged; // Do not repeat app initialization when the Window already has content, // just ensure that the window is active if (rootFrame == null) { // Create a Frame to act as the navigation context and navigate to the first page rootFrame = new Frame(); rootFrame.NavigationFailed += OnNavigationFailed; if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) { //TODO: Load state from previously suspended application } // Place the frame in the current Window Window.Current.Content = rootFrame; } if (e.PrelaunchActivated == false) { if (rootFrame.Content == null) { // When the navigation stack isn't restored navigate to the first page, // configuring the new page by passing required information as a navigation // parameter rootFrame.Navigate(typeof(MainPage), e.Arguments); } // Ensure the current window is active Window.Current.Activate(); } }
private async void People_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) { DataPeopleHelper helper = new DataPeopleHelper("people.json"); helper.WriteToFile(People); }