如果倒数计时器归零，label 就会消失

Question

我有一个显示倒数计时器的文本块（tbTime）。 当它变为零时，Textblock (tbTime) 仍显示零值。 但我想让这个文本块（tbTime）在倒数计时器归零后消失。 有人可以帮我吗？

C#代码

public partial class InfoScreen : Window
    {

        DispatcherTimer timer;
                TimeSpan time;
        public InfoScreen()
        {
            InitializeComponent();
            AppearingNext();
            time = TimeSpan.FromSeconds(10);

            timer = new DispatcherTimer(new TimeSpan(0, 0, 1), DispatcherPriority.Normal, delegate
            {
                tbTime.Text = time.ToString("ss");
                if (time == TimeSpan.Zero) timer.Stop();
                time = time.Add(TimeSpan.FromSeconds(-1));
            }, Application.Current.Dispatcher);
            if (tbTime.Text == "00") //My code doesn't work! 
            {
                tbTime.Visibility = Visibility.Hidden;
            }

        }
        private async void AppearingNext()
        {
            await Task.Delay(TimeSpan.FromSeconds(10));
            VisbilityPanel.Visibility = Visibility.Visible;

        }

        private void AgreementClick(object sender, RoutedEventArgs e)
        {
            var registration = new Reset_Register();
            registration.Show();
            Close();
        }
    }

Answer 1

一种解决方案是将隐藏文本块的代码放入计时器的回调中：

timer = new DispatcherTimer(new TimeSpan(0, 0, 1), DispatcherPriority.Normal, delegate {
    tbTime.Text = time.ToString("ss");
    if (tbTime.Text == "00") {
        tbTime.Visibility = Visibility.Hidden;
    }

    if (time == TimeSpan.Zero) timer.Stop();
    time = time.Add(TimeSpan.FromSeconds(-1));
}, Application.Current.Dispatcher);