To do a WPF-based audio file looping order playback first, understand what classes under WPF are used to control audio.
There are two main audio-controlled classes under WPF, and here are the comparisons:
1.SoundPlayer
2.MediaPlayer
Derived MediaElement
I. SoundPlayer class
1 based on the. NET FRAMEWORK 2.0;
2. Can play WAV audio files;
3. Can play only one file, while playing multiple files after the playback of a file will terminate the previous playback of the file;
4. Can not control the volume;
Two. MediaPlayer class
1. Based on WPF;
2. Support a variety of audio files;
3. Can play multiple sounds at the same time;
4. Can adjust the volume of audio control;
5. Support to set mute and left and right speaker;
6. Can control the audio playback speed and obtain the playback progress and control progress;
MediaElement similar MediaPlayer functions, the labels available as WPF pages are derived from MediaPlayer;
The development idea of circular sequential playback of audio files in WPF:
First, a new class inherits MediaElement;
This class contains playback logic features:
1. Read all audio files in the specified folder;
2. Put the read file path into the list;
3. Sequentially read the file name in the list;
4. Play audio files;
5. Read the next filename until the end of the list;
6. Play audio files to the end of the list the transformation list head continues to play;
Loading this class in the XAML interface;
The play List of this class is executed in the Window load event;
The following is a list of code that is played in the looping order of the audio files in WPF:
Copy Code code as follows:
WPF Interface Code
<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"
"MainWindow" height= "title=" width= "525" loaded= "window_loaded" >
<StackPanel>
<md:mediamanager x:name= "Media" ></md:MediaManager>
</StackPanel>
</Window>
Copy Code code as follows:
WPF Interface CS Code
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 ();
}
}
}
Copy Code code as follows:
Mediamanager Class
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"};
}
}
