SpeechLib这的dll专门用来播放语音，能够识别英语、简体和繁体。并且可以播放声音文件，支持WAV格式，但不支持MP3。在报警场合下已经够用了。
基本播放语音及文件。支持异步。
using System;
using System.Threading;
using SpeechLib; namespace Model.AlarmHandle
{ /// <summary>
///语音播报
/// </summary>
public class SpeechVoice
{
/// <summary>
/// The _voice
/// </summary>
private SpVoice _voice;
private SpVoiceClass spVoice;
private readonly SpFileStreamClass spFile; /// <summary>
/// Initializes a new instance of the <see cref="SpeechVoice"/> class.
/// </summary>
public SpeechVoice()
{
_voice = new SpVoice();
spVoice = new SpVoiceClass();
spFile = new SpFileStreamClass();
} /// <summary>
/// 播放
/// </summary>
/// <param name="text">The text.</param>
/// <param name="speakFlag">The speak flag.</param>
public void Speak(string text, SpeechVoiceSpeakFlags speakFlag = SpeechVoiceSpeakFlags.SVSFDefault)
{
_voice.Speak(string.Empty); _voice.Speak(text, speakFlag);
} /// <summary>
/// 异步播放
/// </summary>
/// <param name="text">The text.</param>
public void SpeakAsync(string text)
{
_voice.Speak(text, SpeechVoiceSpeakFlags.SVSFlagsAsync);
} /// <summary>
/// Plays the sound.
/// </summary>
/// <param name="fileName">Name of the file.</param>
public void PlaySound(string fileName)
{
//要加载COM组件:Microsoft speech object Library
if (!System.IO.File.Exists(fileName)) return;
spFile.Open(fileName, SpeechStreamFileMode.SSFMOpenForRead, true);
var istream = spFile as ISpeechBaseStream;
spVoice.SpeakStream(istream, SpeechVoiceSpeakFlags.SVSFIsFilename);
spFile.Close();
} /// <summary>
/// 暂停
/// </summary>
public void Pause()
{
if (_voice != null)
_voice.Pause();
} /// <summary>
/// Stops the voice.
/// </summary>
public void StopVoice()
{
_voice.Pause();
_voice.Speak(string.Empty, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak);
} /// <summary>
/// Pauses the file.
/// </summary>
public void StopFile()
{
try
{
spFile.ISpStream_Close();
}
catch (Exception)
{
}
} /// <summary>
/// 恢复
/// </summary>
public void Resume()
{
if (_voice != null)
_voice.Resume();
} }
/// <summary>
///语音播报状态
/// </summary>
public enum VoiceStatus
{
/// <summary>
/// The play
/// </summary>
Play,
/// <summary>
/// The ready
/// </summary>
Ready,
/// <summary>
/// The pause
/// </summary>
Pause,
} }
但真的运用时，还需要支持循环播放，以及播放状态。
private SpeechVoice _speaker;
private bool _isLoopAudioFile; // 是否循环播放声音文件
private bool _isLoopSpeech; //循环语音
private VoiceStatus speakStatus=VoiceStatus.Ready;
private bool IsStopPlayFile; //是否停止
private bool IsStopPlayVoice; /// <summary>
/// 播放文件结束
/// </summary>
public event EventHandler PlayFileComplete;
/// <summary>
/// 播放文件开始
/// </summary>
public event EventHandler PlayFileStart; /// <summary>
/// 播放文件结束
/// </summary>
public event EventHandler PlayAudioComplete;
/// <summary>
/// 播放文件开始
/// </summary>
public event EventHandler PlayAudioStart; /// <summary>
/// 播放语言
/// </summary>
/// <param name="voiceContent">Content of the voice.</param>
public void SpeechVoice(string voiceContent)
{
IsStopPlayVoice = false;
if (speakStatus == VoiceStatus.Play) return; //正在播放就返回
Speaker.Resume();
Action invoke = () =>
{
OnPlayAudioStart();//触发开始播放事件
speakStatus = VoiceStatus.Play;
Speaker.Speak(voiceContent);
};
invoke.BeginInvoke(VoiceCallback, invoke);
}
private void VoiceCallback(IAsyncResult ar)
{
var ac = ar.AsyncState as Action;
if (ac != null)
{
try//原dll不能多次停止 所以加了try catch 和状态判断
{
if ((IsLoopSpeech) && !IsStopPlayVoice)
{
//一次播放结束之后如果是循环播放 就继续播放
ac.BeginInvoke(VoiceCallback, ac);
}
else
{
speakStatus = VoiceStatus.Pause;
//触发停止事件
OnPlayAudioComplete(this, new EventArgs());
ac.EndInvoke(ar);
}
}
catch (Exception)
{ }
}
} //以下同理
/// <summary>
/// 暂停播放
/// </summary>
public void StopSpeechVoice()
{
if (IsStopPlayVoice) return;
IsStopPlayVoice = true;
speakStatus = VoiceStatus.Pause;
Action invoke = () => Speaker.StopVoice();
invoke.BeginInvoke(null, invoke);
OnPlayAudioComplete(this, new EventArgs());
}
/// <summary>
/// 停止播放声音文件
/// </summary>
public void StopPlayer()
{
if (IsStopPlayVoice) return;
IsStopPlayFile = true;
speakStatus = VoiceStatus.Pause;
Speaker.PauseFile();
OnPlayFileComplete(this, new EventArgs());
} /// <summary>
/// 播放声音文件
/// </summary>
public void PlayAudioFile()
{
player = new SoundPlayer { SoundLocation = _audioFile.FilePath };
if(speakStatus==VoiceStatus.Play) return;
IsStopPlayFile = false;
if (File.Exists(_audioFile.FilePath))
{
Action invoke = () =>
{
OnPlayFileStart();
speakStatus = VoiceStatus.Play;
Speaker.PlaySound(_audioFile.FilePath);
};
invoke.BeginInvoke(Callback, invoke);
}
} /// <summary>
/// Called when [play start].
/// </summary>
public void OnPlayFileStart()
{
var handler = PlayFileStart;
if (handler != null) handler(this, EventArgs.Empty);
} /// <summary>
/// Called when [play start].
/// </summary>
public void OnPlayAudioStart()
{
var handler = PlayAudioStart;
if (handler != null) handler(this, EventArgs.Empty);
} /// <summary>
/// Called when [play complete].
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
public void OnPlayAudioComplete(object sender, EventArgs e)
{
EventHandler handler = PlayAudioComplete;
if (handler != null) handler(this, EventArgs.Empty);
} /// <summary>
/// Called when [play complete].
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
public void OnPlayFileComplete (object sender, EventArgs e)
{
EventHandler handler = PlayFileComplete;
if (handler != null) handler(this, EventArgs.Empty);
} /// <summary>
/// Callbacks the specified ar.
/// </summary>
/// <param name="ar">The ar.</param>
private void Callback(IAsyncResult ar)
{
var ac = ar.AsyncState as Action;
if (ac != null)
{
OnPlayFileComplete(this,new EventArgs());
try
{
if ((IsLoopAudioFile)&& !IsStopPlayFile)
{
ac.BeginInvoke(Callback, ac);
}
else
{
speakStatus = VoiceStatus.Pause;
ac.EndInvoke(ar);
}
}
catch (Exception)
{ }
}
}
语音播放小Demo：SpeechVoice
在繁体系统，或者英文系统下面，有时候出现只能播报英文的情况，这个是犹豫语言资源没有安装。
判断操作系统是否安装中文最简单的方法：
64位系统：查看C:\Program Files (x86)\Common Files\SpeechEngines\Microsoft\TTS20路径下是否有zh-CHS文件夹
32位系统：查看C:\Program Files\Common Files\SpeechEngines\Microsoft\TTS20路径下是否有zh-CHS文件夹
如果不存在则表明缺少中文语言包，一般情况下，win7及以上的中文操作系统都自带了，不需要安装，其他操作系统基本上都没有安装，简体XP系统也没有安装
安装方法是：
1、 打开控制面板的window update，见下图：
2. 选择检查更新按钮，然后再更新列表中选择“可用的附件程序”
3、 选择简体中文语言包，勾选并安装即可
4、 安装完成后可以检查C:\Program Files (x86)\Common Files\SpeechEngines\Microsoft\TTS20路径下是否有zh-CHS文件夹，有则表明安装成功
安装成功以后就可以使用语音播报功能了。