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   源码介绍

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基于Windows Media Player 的WPF播放器程序，可以播放mp3,wma,3gp等格式的音频文件

using Microsoft.Win32;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPFMediaPlayerApp
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private string _videoPath;

        public MainWindow()
        {
            InitializeComponent();
        }

        private void ButtonOpen_Click(object sender, RoutedEventArgs e)
        {
            OpenFileDialog dialog = new OpenFileDialog();

            dialog.Filter = "Video File(*.avi;*.mp4;*.mkv;*.wav;*.rmvb)|*.avi;*.mp4;*.mkv;*.wav;*.rmvb|All File(*.*)|*.*";

            if(dialog.ShowDialog().GetValueOrDefault())
            {
                _videoPath = dialog.FileName;
            }
        }

        private void ButtonPlay_Click(object sender, RoutedEventArgs e)
        {
            MediaPlayer.Source = new Uri(_videoPath);

            MediaPlayer.Play();
        }

        private void ButtonStop_Click(object sender, RoutedEventArgs e)
        {
            MediaPlayer.Stop();
        }

        private void ButtonForward_Click(object sender, RoutedEventArgs e)
        {
            MediaPlayer.Position = MediaPlayer.Position   TimeSpan.FromSeconds(20);
        }

        private void ButtonBack_Click(object sender, RoutedEventArgs e)
        {
            MediaPlayer.Position = MediaPlayer.Position - TimeSpan.FromSeconds(20);
        }

        private void MediaPlayer_MediaOpened(object sender, RoutedEventArgs e)
        {
            // Get the lenght of the video
            int duration = MediaPlayer.NaturalDuration.TimeSpan.Seconds;
        }
    }
}