如何异步增加计时器

Question

我试图在单击按钮上异步更新计时器。

说示例我设置了时间= 60秒

，几分钟后我运行程序时，计时器已达到45秒，当我单击按钮时，它应该在时间添加j = 15秒，并且计时器应将60秒更改为同步。请帮助

    private int time = 60;
    DateTime dt = new DateTime();
    private j = 15 ;
    private DispatcherTimer timer;
    public MainWindow()
    {
        InitializeComponent();
        timer = new DispatcherTimer();
        timer.Interval = new TimeSpan(0, 0, 1);
        timer.Tick += timer_tick;
        timer.Start();
        }
    void timer_tick(object sender, EventArgs e)
    {
        if (time >0)
        {
          time--;
            text.Text = TimeSpan.FromSeconds(time).ToString();
        }
        else
        {
            timer.Stop();
        }
    }
  private void Button_Click(object sender, RoutedEventArgs e)
    {
        text.Text = dt.AddSeconds(j).ToString("HH:mm:ss");
    }

Answer 1

这是我的代码，您可以尝试它。

    private int time = 60;
    DateTime dt = new DateTime();
    private int j = 15;
    private Timer timer1 = new Timer();

    void timer_tick(object sender, EventArgs e)
    {
        if (time > 0)
        {
            time--;
            text.Text = TimeSpan.FromSeconds(time).ToString();
        }
        else
        {
            timer1.Stop();
        }
    }
    public timer()
    {
        InitializeComponent();
        timer1 = new Timer();
        timer1.Interval = 1000;
        timer1.Tick += timer_tick;
        timer1.Start();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        time += j;
    }