WPF 进度条

最新推荐文章于 2025-05-02 16:31:54 发布

cloud_yd

最新推荐文章于 2025-05-02 16:31:54 发布

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文章标签： c# wpf windows

本文链接：https://blog.youkuaiyun.com/cloud_yd/article/details/120619124

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其实不考虑系统兼容性的话有更简单的解决方案：

Media players - Windows apps | Microsoft Docs

如果没办法保证目标机器的系统版本还是建议使用MediaElement。

ProgressBarConvert.cs

    internal class ProgressBarConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return TimeSpan.FromMilliseconds((double)value).ToString(@"hh\:mm\:ss\.fff");
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return ((TimeSpan)value).TotalMilliseconds;
        }
    }

MediaPlayer.xaml

<Slider x:Name="ProgressBar" Style="{DynamicResource PlayerSliderStyle}"  Width="1180" Canvas.Top="596" Minimum="0" TickFrequency="30"/>
<TextBlock  Text="{Binding ElementName=ProgressBar, Path=Value, Converter={StaticResource ProgressBarConvert}}"  FontSize="20"/>

Slider的最大值需要在MediaOpend时获取（媒体文件打开之前获取的不正确）；Value通过定时器与视频进度同步；

        private DispatcherTimer MediaTimer;
        private void VideoPlayer_MediaOpened(object sender, RoutedEventArgs e)
        {
            ProgressBar.Maximum = VideoPlayer.NaturalDuration.TimeSpan.TotalMilliseconds;

            MediaTimer = new DispatcherTimer
            {
                Interval = TimeSpan.FromMilliseconds(30)
            };
            MediaTimer.Tick += new EventHandler(Timer_tick);
            MediaTimer.Start();
        }

        private void Timer_tick(object sender, EventArgs e)
        {
            ProgressBar.Value = VideoPlayer.Position.TotalMilliseconds;
        }

显示效果：