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   源码介绍

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可以播放 avi/mp3等音频文件

using System;
using System.Windows;
using System.Windows.Forms;
using System.Windows.Threading;

namespace VideoPlayer
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private readonly DispatcherTimer timer = new DispatcherTimer();


        public MainWindow()
        {
            InitializeComponent();
            timer.Tick  = timer_Tick;
        }

        private void timer_Tick(object sender, EventArgs e)
        {
            slider2.Value = mediaElement1.Position.TotalMilliseconds;
        }

        private void mediaElement1_MediaOpened(object sender, RoutedEventArgs e)
        {
            slider2.Maximum = mediaElement1.NaturalDuration.TimeSpan.TotalMilliseconds;
            timer.Interval = new TimeSpan(0, 0, 1);
            timer.Start();
        }

        private void mediaElement1_MediaEnded(object sender, RoutedEventArgs e)
        {
            StopMovie();
            timer.Stop();
        }

        private void btnExit_Click(object sender, RoutedEventArgs e)
        {
            Close();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            slider1.SelectionStart = 0;
            slider1.SelectionEnd = 1;
        }

        private void btnPlay_Click(object sender, RoutedEventArgs e)
        {
            var openFileDialog = new OpenFileDialog();
            openFileDialog.Filter = "音/视频文件|*.avi;*.mp3;*.dat;*.wav;*.rmvb;*.rm;*.wmv";
            if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                mediaElement1.Source = new Uri(openFileDialog.FileName);
                mediaElement1.Volume = slider1.Value;
                mediaElement1.Play();
                btnStart.Content = "暂停";
                image1.Visibility = Visibility.Hidden;
            }
        }

        private void btnStart_Click(object sender, RoutedEventArgs e)
        {
            if (btnStart.Content.ToString() == "开始")
            {
                if (mediaElement1.HasAudio || mediaElement1.HasVideo)
                {
                    mediaElement1.Play();
                    btnStart.Content = "暂停";
                    image1.Visibility = Visibility.Hidden;
                }
            }
            else
            {
                mediaElement1.Pause();
                btnStart.Content = "开始";
                image1.Visibility = Visibility.Hidden;
            }
        }

        private void btnStop_Click(object sender, RoutedEventArgs e)
        {
            StopMovie();
        }

        private void StopMovie()
        {
            mediaElement1.Position = TimeSpan.Zero;
            mediaElement1.Stop();
            slider2.Value = 0;
            btnStart.Content = "开始";
            image1.Visibility = Visibility.Visible;
        }

        private void btnAllScreen_Click(object sender, RoutedEventArgs e)
        {
            if (this.IsFullscreen())
            {
                this.ExitFullscreen();
            }
            else
            {
                this.GoFullscreen();
            }
        }

        private void slider2_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            var timeSpan = new TimeSpan(0, 0, 0, 0, (int) slider2.Value);
            mediaElement1.Position = timeSpan;
        }

        private void slider1_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            mediaElement1.Volume = slider1.Value;
        }
    }
}