今天，項目中要求用聲音來提示用戶程序的某個狀態(tài)被激活了，發(fā)現(xiàn)，.Net CF下沒有System.Media這種好東東鳥～，于是乎，股溝、百毒最后再來個ZZK，發(fā)現(xiàn)MSDN和小鎮(zhèn)的文章都有提及在PPC下如何播放聲音（還有很多文章提到的方法差不多，但是都有網(wǎng)友反映不能成功播放，所以我在這里就過濾掉了），msdn中說道的文章，好多朋友反映是播放不出來，在此我沒有去考證，我直接使用了小鎮(zhèn)的代碼，并且成功的播放了聲音，所以，寫下此篇隨筆，一來做個備份，二來和大家分享一下～

首先，我們建立一個.net cf 2.0下，名稱為SoundPlay的WM5 ppc項目，當然語言我選擇的是C#。

然后界面設(shè)計如下：其中：

lblFileName——Text屬性：文件地址

btnOpen——Text屬性：瀏覽文件

btnPlay——Text屬性：播放聲音

新建一個類：Sound，代碼和小鎮(zhèn)的差不多，不過我做過一小點修改，所以也貼出來，方便大家查閱：

?

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);//播放外部聲音文件

????????[DllImport("CoreDll.DLL",?EntryPoint?=?"PlaySound",?SetLastError?=?true)]
????????private?extern?static?int?MoiblePlaySoundBytes(byte[]?szSound,?IntPtr?hMod,?int?flags);//播放嵌入聲音資源


????????///?<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>
????????///?從一個聲音byte流構(gòu)造函數(shù)Sound
????????///?</summary>
????????///?<param?name="snd"></param>
????????public?Sound(byte[]?snd)
????????{
????????????m_soundBytes?=?snd;
????????}
????????///?<summary>
????????///?構(gòu)造一個空Sound函數(shù)，此函數(shù)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,此方法應該對應從Byte和Stream構(gòu)造的Sound
????????///?注意，它的Flags設(shè)置為SND_MEMORY，因為我們的聲音文件已經(jīng)轉(zhuǎn)換到內(nèi)存中了
????????///?</summary>
????????public?void?Play()
????????{
????????????MoiblePlaySoundBytes(m_soundBytes,?IntPtr.Zero,?(int)(Flags.SND_ASYNC?|?Flags.SND_MEMORY));
????????}
????}
}

?

然后，主界面上的按鈕事件代碼如下：

?

按鈕代碼
?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);
????????}

?

夠清楚了吧，經(jīng)過測試，兩種方式（通過流或者指定文件路徑）均能播放出選中的.wav聲音文件。

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