今天，项目中要求用声音来提示用户程序的某个状态被激活了，发现，.Net CF下没有System.Media这种好东东鸟～，于是乎，股沟、百毒最后再来个ZZK，发现MSDN和的文章都有提及在PPC下如何播放声音（还有很多文章提到的方法差不多，但是都有网友反映不能成功播放，所以我在这里就过滤掉了），msdn中说道的文章，好多朋友反映是播放不出来，在此我没有去考证，我直接使用了小镇的代码，并且成功的播放了声音，所以，写下此篇随笔，一来做个备份，二来和大家分享一下～
首先，我们建立一个.net cf 2.0下，名称为SoundPlay的WM5 ppc项目，当然语言我选择的是C#。
然后界面设计如下：其中：
lblFileName——Text属性：文件地址
btnOpen——Text属性：浏览文件
btnPlay——Text属性：播放声音
新建一个类：Sound，代码和小镇的差不多，不过我做过一小点修改，所以也贴出来，方便大家查阅：
Sound using System;using System.Runtime.InteropServices;using System.IO;using System.Collections.Generic;using System.Text;namespace SoundPlay{ public class Sound { private byte[] m_soundBytes; private enum Flags { SND_SYNC = 0x0000, /* play synchronously (default) */ SND_ASYNC = 0x0001, /* play asynchronously */ SND_NODEFAULT = 0x0002, /* silence (!default) if sound not found */ SND_MEMORY = 0x0004, /* pszSound points to a memory file */ SND_LOOP = 0x0008, /* loop the sound until next sndPlaySound */ SND_NOSTOP = 0x0010, /* don't stop any currently playing sound */ SND_NOWAIT = 0x00002000, /* don't wait if the driver is busy */ SND_ALIAS = 0x00010000, /* name is a registry alias */ SND_ALIAS_ID = 0x00110000, /* alias is a predefined ID */ SND_FILENAME = 0x00020000, /* name is file name */ SND_RESOURCE = 0x00040004 /* name is resource name or atom */ } [DllImport("CoreDll.DLL", EntryPoint = "PlaySound", SetLastError = true)] private extern static int MobilePlaySound(string szSound, IntPtr hMod, int flags);//播放外部声音文件 [DllImport("CoreDll.DLL", EntryPoint = "PlaySound", SetLastError = true)] private extern static int MoiblePlaySoundBytes(byte[] szSound, IntPtr hMod, int flags);//播放嵌入声音资源 /// <summary> /// Construct the Sound object to play sound data from the specified stream. /// </summary> public Sound(Stream stream) { // read the data from the stream m_soundBytes = new byte[stream.Length]; stream.Read(m_soundBytes, 0, (int)stream.Length); } /// <summary> /// 从一个声音byte流构造函数Sound /// </summary> /// <param name="snd"></param> public Sound(byte[] snd) { m_soundBytes = snd; } /// <summary> /// 构造一个空Sound函数，此函数用于播放外部文件 /// </summary> public Sound() { } /// <summary> /// Play the sound File播放外部文件的Play方法 /// </summary> public void Play(string filename) { MobilePlaySound(filename, IntPtr.Zero, (int)(Flags.SND_ASYNC | Flags.SND_FILENAME)); } /// <summary> /// Play The Stream Sound,此方法应该对应从Byte和Stream构造的Sound /// 注意，它的Flags设置为SND_MEMORY，因为我们的声音文件已经转换到内存中了 /// </summary> public void Play() { MoiblePlaySoundBytes(m_soundBytes, IntPtr.Zero, (int)(Flags.SND_ASYNC | Flags.SND_MEMORY)); } }}
然后，主界面上的按钮事件代码如下：
按钮代码 private void btnOpen_Click(object sender, EventArgs e) { using (OpenFileDialog ofd = new OpenFileDialog()) { if (ofd.ShowDialog() == DialogResult.OK) { lblFileName.Text = ofd.FileName; } } } private void btnPlay_Click(object sender, EventArgs e) { Sound sound = new Sound(); sound.Play(lblFileName.Text); }
够清楚了吧，经过测试，两种方式（通过流或者指定文件路径）均能播放出选中的.wav声音文件。