C# 语音功能的实现方法

首先要安装SpeechSDK5.1 开发包和SpeechSDK5.1 Langague Pack（中英文） 语言包，不过VS2010里是自带SpeechSDK5.0的com组件的，也可以用。

 简单讲一下四个方法：

朗读时，使用

voice.Speak(string,SpeechVoiceSpeakFlags.SVSFlagsAsync);

暂停，使用

voice.Pause();

从暂停中继续刚才的朗读，使用

voice.Resume();

停止功能

voice.Speak(string.Empty, SpeechVoiceSpeakFlags.SVSFPurgeBeforeSpeak);

这样就可以完整地实现了“朗读”、“暂停”、“继续”、“停止”的功能。

下面就直接给出实例代码：

 private void button1_Click(object sender, EventArgs e)
        {
            Analyse(this.textBox1.Text);
        }

public void Analyse(string strSpeak)
        {
            int iCbeg = 0;
            int iEbeg = 0;
            bool IsChina = true;
            for (int i = 0; i < strSpeak.Length; i++)
            {
                char chr = strSpeak[i];
                if (IsChina)
                {
                    if (Convert.ToInt32(chr) <= 122 && Convert.ToInt32(chr) >= 65)
                    {
                        int iLen = i - iCbeg;
                        string strValue =
             strSpeak.Substring(iCbeg, iLen);
                        SpeakChina(strValue);
                        iEbeg = i;
                        IsChina = false;
                    }
                }
                else
                {
                    if (Convert.ToInt32(chr) > 122 || Convert.ToInt32(chr) < 65)
                    {
                        int iLen = i - iEbeg;
                        string strValue =
strSpeak.Substring(iEbeg, iLen);
                        this.SpeakEnglishi(strValue);
                        iCbeg = i;
                        IsChina = true;
                    }
                }
            }

             if (IsChina)    
             {       int iLen = strSpeak.Length - iCbeg;
                 string strValue = strSpeak.Substring(iCbeg, iLen);
                 SpeakChina(strValue);
             }     
             else
             {
                 int iLen = strSpeak.Length - iEbeg;
                 string strValue = strSpeak.Substring(iEbeg, iLen);
                 SpeakEnglishi(strValue);
             }

        }

        //中文
        private void SpeakChina(string speak)
        {
            voice = new SpVoice();
            voice.Voice = voice.GetVoices(string.Empty, string.Empty).Item(3);//其中3为中文，024为英文
            voice.Speak(speak, SpeechVoiceSpeakFlags.SVSFDefault);

        }
        //英文
        private void SpeakEnglishi(string speak)
        {
            voice = new SpVoice();
            voice.Voice = voice.GetVoices(string.Empty, string.Empty).Item(0);//其中3为中文，024为英文
            voice.Speak(speak, SpeechVoiceSpeakFlags.SVSFDefault);

        }

//保存语音
        private void button2_Click(object sender, EventArgs e)
        {
                 try    
                 {
                     SpeechVoiceSpeakFlags SpFlags = SpeechVoiceSpeakFlags.SVSFlagsAsync;
                     SpVoice Voice = new SpVoice();      
                     SaveFileDialog sfd = new SaveFileDialog();     
                     sfd.Filter = "All files (*.*)|*.*|wav files (*.wav)|*.wav";      
                     sfd.Title = "Save to a wave file";      
                     sfd.FilterIndex = 2;      
                     sfd.RestoreDirectory = true;      
                     if (sfd.ShowDialog() == DialogResult.OK)      
                     {        
                         SpeechStreamFileMode SpFileMode = SpeechStreamFileMode.SSFMCreateForWrite;
                         SpFileStream SpFileStream = new SpFileStream();
                         SpFileStream.Open(sfd.FileName, SpFileMode, false);
                         Voice.AudioOutputStream = SpFileStream;
                         Voice.Speak(this.textBox1.Text, SpFlags);
                         Voice.WaitUntilDone(100);
                         SpFileStream.Close();
                     }    
                 }  
                 catch (Exception er)
                 {
                     MessageBox.Show("An Error Occured!", "SpeechApp", MessageBoxButtons.OK, MessageBoxIcon.Error);
                 }

        }