c# - 使用 C# 在 Windows Store 应用程序中的不同时间使用 2 个 Dispatcher Timer

Question

我想要一个 MediaElement 应用程序。我想在指定时间使用此应用程序暂停 MediaElement。从理论上讲，我应该为此使用 2 DispatcherTimer。我正在使用 DispatcherTimer 进行暂停，但第二个计时器没有运行。我的代码有什么问题吗？这是我的代码。提前致谢

static DispatcherTimer dispatcherTimer, dispatcherTimer2;
        private void MediaElement_CurrentStateChanged(object sender, RoutedEventArgs e)
        {
            if (((MediaElement)sender).CurrentState == MediaElementState.Playing)
            {

                tbMessage.Text = "playing";
                dispatcherTimer = new DispatcherTimer();
                dispatcherTimer.Tick += new EventHandler<object>(dispatcherTimer_Tick);
                dispatcherTimer.Interval = new TimeSpan(0, 0, 1);
                dispatcherTimer.Start();

                dispatcherTimer2 = new DispatcherTimer();
                dispatcherTimer2.Tick += dispatcherTimer2_Tick;
                dispatcherTimer2.Interval = new TimeSpan(0, 0, 1);
                dispatcherTimer2.Start();
            }
        }

        void dispatcherTimer2_Tick(object sender, object e)
        {

            tb2.Text = dispatcherTimer2.Interval.Seconds.ToString();
            if (dispatcherTimer2.Interval.Seconds == 12)
            {
                mp.Play();
                //dispatcherTimer.Start();
            }
        }

        private void dispatcherTimer_Tick(object sender, object e)
        {

            // Updating the Label which displays the current second
            tbMessage.Text = DateTime.Now.Second.ToString();
            tbMessage.Text = mp.Position.Seconds.ToString() + " " + dispatcherTimer.Interval.Seconds.ToString();
            if (mp.Position.Seconds == 3)
            {
                mp.Pause();

            }

        } 

Answer 1

我用以下解决方案解决了我的问题。也许它可以帮助某人。

DispatcherTimer dispatcherTimer = new DispatcherTimer();
        private void Page_Loaded(object sender, RoutedEventArgs e)
        {
            dispatcherTimer.Tick += new EventHandler<object>(dispatcherTimer_Tick);
            dispatcherTimer.Interval = new TimeSpan(0, 0, 1);

            int QuestionCount = AppConfiguration.QuestionList.allsecs.Split('-').Length;
            QuestionTimes = new int[QuestionCount];
            for (int i = 0; i < QuestionTimes.Length; i++)
            {
                if (AppConfiguration.QuestionList.allsecs.Split('-')[i] != null && AppConfiguration.QuestionList.allsecs.Split('-')[i] != "")
                {
                    QuestionTimes[i] = Convert.ToInt32(AppConfiguration.QuestionList.allsecs.Split('-')[i]);
                }
            }

            string QuestionVideoLink = AppConfiguration.QuestionList.VideoLink;
            VideoPlayer.Source = new Uri(AppConfiguration.TestVideoLink + QuestionVideoLink, UriKind.Absolute);
        }

        static bool flag = false;

private void dispatcherTimer_Tick(object sender, object e)
        {
            count++;
            tbMessage.Text = count.ToString();

                //tbMessage.Text = DateTime.Now.Second.ToString();
                //tbMessage.Text = mp.Position.Seconds.ToString() + " " + dispatcherTimer.Interval.Seconds.ToString();
                if (sn.Contains(mp.Position.Seconds) && !flag)
                {
                    mp.Pause();
                    dispatcherTimer.Stop();
                    tbDenemeSoru.Text = "Deneme Soru 1";
                    tbMessage.Text = "Video Durdu";
                    pnlProgressBar.Visibility = Windows.UI.Xaml.Visibility.Visible;
                    count = 0;
                }
                if (sn.Contains(mp.Position.Seconds) && !flag)
                {
                    mp.Pause();
                    dispatcherTimer.Stop();
                    tbDenemeSoru.Text = "Deneme Soru 2";
                    tbMessage.Text = "Video Durdu";
                    pnlProgressBar.Visibility = Windows.UI.Xaml.Visibility.Visible;
                    count = 0;
                }

                if (mp.Position.Seconds > 3 && count == 0)
                {
                    flag = true;
                }


            // Updating the Label which displays the current second

            // Forcing the CommandManager to raise the RequerySuggested event
            //CommandManager.InvalidateRequerySuggested();
        }

        private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            pnlProgressBar.Visibility = Windows.UI.Xaml.Visibility.Collapsed;
            mp.Play();
            dispatcherTimer.Start();
            flag = false;
        }

Answer 2

dispatcherTimer2.Interval.Seconds 

是滴答声之间的时间， 因为这是 1 秒而不是 12 秒，if 语句将始终为假

你可以试试这个：

int ticks = 0;
void dispatcherTimer2_Tick(object sender, object e)
        {
            ticks++;
            tb2.Text = ticks.ToString();
            if (ticks == 12)
            {
                mp.Play();
                //dispatcherTimer.Start();

                ticks = 0;
            }
        }

或类似的东西