解析WPF实现音频文件循环顺序播放的解决方法_.Net教程

WPF界面代码
<Window x:Class="MediaApplication.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:md="clr-namespace:MediaApplication"
Title="MainWindow" Height="350" Width="525" Loaded="Window_Loaded">
<StackPanel>
<md:MediaManager x:Name="media"></md:MediaManager>
</StackPanel>
</Window>

WPF界面CS代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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.IO;
using System.Collections.ObjectModel;
using System.Configuration;

namespace MediaApplication {
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
}

private void Window_Loaded(object sender, RoutedEventArgs e) {
this.media.PlayList();
}


}
}

MediaManager类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.IO;
using System.Configuration;
using System.Windows;
using System.Collections.ObjectModel;
namespace MediaApplication {
public class MediaManager : MediaElement {
public MediaManager() {
try {
GetAllDirList(new DirectoryInfo(ConfigurationManager.AppSettings["dir"].ToString()));
} catch {
}
}
public void PlayList() {
if(files.Count > 0)
{
this.UnloadedBehavior = MediaState.Manual;
this.LoadedBehavior = MediaState.Manual;
this.MediaEnded += new RoutedEventHandler(media_MediaEnded);
this.Source = new Uri( files[index], UriKind.RelativeOrAbsolute);
this.Play();
}
}
private void GetAllDirList(DirectoryInfo directory) {
foreach(string filter in filters)
{
foreach (FileInfo file in directory.GetFiles(filter)) {
files.Add(file.FullName);
}
}
foreach (DirectoryInfo subDirectory in directory.GetDirectories()) {
GetAllDirList(subDirectory);
}
}
private void media_MediaEnded(object sender, RoutedEventArgs e) {
this.Source = new Uri( files[++index % files.Count], UriKind.RelativeOrAbsolute);
this.Play();
}
private ObservableCollection<string> files = new ObservableCollection<string>();
private int index = 0;
private string[] filters = new string[] { "*.wav", "*.mp3" };
}
}