public async void LoadData()
{
SQLiteService.LoadDatabase();
CourseList = await CourseManager.GetCourseListFromDatabase();
LessonList = await CourseManager.GetLessonListFromDatabase();
}
public override Task OnLaunchedAsync(ILaunchActivatedEventArgs e)
{
// Load the database
SQLiteService.LoadDatabase();
this.NavigationService.Navigate(typeof(Views.MainPage));
return(Task.FromResult <object>(null));
}
/// <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 override void OnLaunched(LaunchActivatedEventArgs e)
{
TileUpdater tileUpdate = TileUpdateManager.CreateTileUpdaterForApplication();
tileUpdate.EnableNotificationQueue(true);
tileUpdate.Clear();
#if DEBUG
if (System.Diagnostics.Debugger.IsAttached)
{
this.DebugSettings.EnableFrameRateCounter = true;
}
#endif
SQLiteService.LoadDatabase();
Frame rootFrame = Window.Current.Content as Frame;
// 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();
}
}
/// <summary>
/// 在应用程序由最终用户正常启动时进行调用。
/// 将在启动应用程序以打开特定文件等情况下使用。
/// </summary>
/// <param name="e">有关启动请求和过程的详细信息。</param>
protected override void OnLaunched(LaunchActivatedEventArgs e)
{
#if DEBUG
if (System.Diagnostics.Debugger.IsAttached)
{
this.DebugSettings.EnableFrameRateCounter = true;
}
#endif
SQLiteService.LoadDatabase();
Frame rootFrame = Window.Current.Content as Frame;
// 不要在窗口已包含内容时重复应用程序初始化，
// 只需确保窗口处于活动状态
if (rootFrame == null)
{
// 创建要充当导航上下文的框架，并导航到第一页
rootFrame = new Frame();
rootFrame.NavigationFailed += OnNavigationFailed;
if (e.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
//TODO: 从之前挂起的应用程序加载状态
}
// 将框架放在当前窗口中
Window.Current.Content = rootFrame;
}
if (rootFrame.Content == null)
{
// 当导航堆栈尚未还原时，导航到第一页，
// 并通过将所需信息作为导航参数传入来配置
// 参数
rootFrame.Navigate(typeof(MainPage), e.Arguments);
}
// 确保当前窗口处于活动状态
Window.Current.Activate();
Windows.UI.Core.SystemNavigationManager.GetForCurrentView().BackRequested += OnBackRequested;
}