private IAsyncOperation <bool> GetLatestNews()
{
try {
return(AsyncInfo.Run(token => TilesHelper.GetNewsAsync()));
} catch (Exception) { /* ignored */ }
return(null);
}
private async void SecondTitleBtn_ClickAsync(object sender, RoutedEventArgs e)
{
Windows.UI.StartScreen.SecondaryTile tile = TilesHelper.GenerateSecondaryTile("SecondaryTitle", "Beansprout UWP", Colors.Transparent);
tile.VisualElements.ShowNameOnSquare150x150Logo =
tile.VisualElements.ShowNameOnSquare310x310Logo =
tile.VisualElements.ShowNameOnWide310x150Logo =
true;
await tile.RequestCreateAsync();
try {
await TilesHelper.GetNewsAsync();
} catch { /* Ignore */ }
}
/// <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 async void OnLaunched(LaunchActivatedEventArgs e)
{
InitAppStateWhenFirstDeployment();
RegisterExceptionHandlingSynchronizationContext();
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 (e.PrelaunchActivated == false)
{
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();
}
try {
await TilesHelper.GetNewsAsync(ignoreTime : true);
} catch { /* Ignore */ }
}