C# 文本转语音朗读

1. 利用DONET框架自带的 SpeechSynthesizer ，缺点是没有感情色彩，抑扬顿挫等。

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.Windows.Shapes;
using System.Speech.Synthesis;
using System.Threading;
using Microsoft.Win32;

namespace MSSpeech
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            speech = new SpeechSynthesizer();
            speech.Rate = rate;
            // speech.SelectVoice("Microsoft Lili");//设置播音员（中文）
            speech.SelectVoice("Microsoft Anna"); //英文
            speech.Volume = value;
            speech.SpeakCompleted += speech_SpeakCompleted;//绑定事件
            Closing += new System.ComponentModel.CancelEventHandler(MainWindow_Closing);

        }

        void MainWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
        {
            speech.SpeakAsyncCancelAll();//停止阅读
            speech.SpeakCompleted -= speech_SpeakCompleted;
        }

        private SpeechSynthesizer speech;
        /// <summary>
        /// 音量
        /// </summary>
        private int value = 100;
        /// <summary>
        /// 语速
        /// </summary>
        private int rate;
        private string words = "";

        private void btnSpeech_Click(object sender, RoutedEventArgs e)
        {
            test();
        }

        void test()
        {

            string text = textBox1.Text;

            if (text.Trim().Length == 0)
            {
                MessageBox.Show("不能阅读空内容!", "错误提示");
                return;
            }

                words = textBox1.Text;
                new Thread(Speak).Start();

        }

        private void Speak()
        {

            speech.SpeakAsync(words);//语音阅读方法

        }

        /// <summary>
        /// 语音阅读完成触发此事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void speech_SpeakCompleted(object sender, SpeakCompletedEventArgs e)
        {
            btnSpeech.Content  = "语音试听";
        }

        // <summary>
        /// 生成语音文件的方法
        /// </summary>
        /// <param name="text"></param>
        private void SaveFile(string text)
        {
            speech = new SpeechSynthesizer();
            var dialog = new SaveFileDialog();
            dialog.Filter = "*.wav|*.wav|*.mp3|*.mp3";
            dialog.ShowDialog();

            string path = dialog.FileName;
            if (path.Trim().Length == 0)
            {
                return;
            }
            speech.SetOutputToWaveFile(path);
            speech.Volume = value;
            speech.Rate = rate;
            speech.Speak(text);
            speech.SetOutputToNull();
            MessageBox.Show("生成成功!在" + path + "路径中！", "提示");

        }

    }
}

　　

2. 百度语音合成，在线模式，缺点需要联网发送请求，如果文本太多就会有延迟问题需要解决。

请求API例子：

Request URL:http://ai.baidu.com/aidemo
Request Method:POST
Status Code:200 OK
Remote Address:220.181.164.109:80
Referrer Policy:no-referrer-when-downgrade
Response Headers
view source
Access-Control-Allow-Origin:*
Connection:keep-alive
Content-Type:text/json; charset=UTF-8
Date:Wed, 26 Sep 2018 07:41:51 GMT
Server:Apache
Tracecode:25108570390947468554092615
Tracecode:25108562210900343306092615
Transfer-Encoding:chunked
Request Headers
view source
Accept:*/*
Accept-Encoding:gzip, deflate
Accept-Language:en-US,en;q=0.8
Connection:keep-alive
Content-Length:751
Content-Type:application/x-www-form-urlencoded; charset=UTF-8
Cookie:BAIDUID=2BF1001DCF35B79BEFB7C9C63C0C90B7:FG=1; BIDUPSID=2BF1001DCF35B79BEFB7C9C63C0C90B7; PSTM=1517209070; H_PS_PSSID=26523_1431_21080_26350_20928; Hm_lvt_8b973192450250dd85b9011320b455ba=1537947694; Hm_lpvt_8b973192450250dd85b9011320b455ba=1537947694; seccode=45956e63379931ef6aa0f3c472ad195c
Host:ai.baidu.com
Origin:http://ai.baidu.com
Referer:http://ai.baidu.com/tech/speech/tts
User-Agent:Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Mobile Safari/537.36
X-Requested-With:XMLHttpRequest
Form Data
view source
view URL encoded
type:tns
spd:5
vol:5
per:4
tex:百度语音，面向广大开发者永久免费开放语音合成技术。所采用的离在线融合技术，根据当前网络状况，自动判断使用本地引擎或云端引擎，进行语音合成，再也不用担心流量消耗了

3. 用 DotNetSpeech.dll 第三方组件，缺点 朗读比较生硬，语音库和本地系统相关。

代码：

SpVoice sp = new SpVoice();
sp.Rate = GetSpeedSelected();
SpeechVoiceSpeakFlags sFlags = SpeechVoiceSpeakFlags.SVSFlagsAsync;
sp.Speak(text, sFlags);

后记：

下面是测试百度文本转语音的例子：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;
using System.Windows;
using System.Windows.Threading;
using System.Windows.Controls;

namespace TextSpeech
{
   public  class BaiduSpeech
    {

       public static string Text2Voice(string sText) {

          sText = Uri.EscapeDataString(sText );
          string post = "type=tns&spd=5&pit=10&vol=5&per=4&tex=%E6%8F%90%E4%BE%9B%E5%A4%9A%E7%A7%8D%E5%8F%91%E9%9F%B3%E4%BA%BA%0A%E6%8F%90%E4%BE%9B%E5%9F%BA%E7%A1%80%E9%9F%B3%E5%BA%93%E5%92%8C%E7%B2%BE%E5%93%81%E9%9F%B3%E5%BA%93%E5%85%B19%E7%A7%8D%E5%8F%91%E9%9F%B3%E4%BA%BA%E4%BE%9B%E6%82%A8%E9%80%89%E6%8B%A9%EF%BC%8C%E9%80%82%E7%94%A8%E4%BA%8E%E6%B3%9B%E9%98%85%E8%AF%BB%E3%80%81%E8%AE%A2%E5%8D%95%E6%92%AD%E6%8A%A5%E3%80%81%E6%99%BA%E8%83%BD%E7%A1%AC%E4%BB%B6%E7%AD%89%E5%BA%94%E7%94%A8%E5%9C%BA%E6%99%AF%EF%BC%8C%E5%8D%B3%E5%B0%86%E6%8E%A8%E5%87%BA%E6%9B%B4%E5%A4%9A%E7%89%B9%E8%89%B2%E5%8F%91%E9%9F%B3%E4%BA%BA";
          post = "type=tns&spd=5&pit=10&vol=5&per=4&tex="+sText;
          string s=  HttpHelper2.httpPost("http://ai.baidu.com/aidemo", post );
         //  MessageBox.Show(s);
           //if get OK result: {"errno":0,"msg":"success","data":"data:audio\/x-mpeg;base64,\/\/MoxAA............VVVV"}
           //convert from audio base64 string to byte
           if (s.Contains("data:audio\\/x-mpeg;base64"))//success get audio
           {
               s = System.Text.RegularExpressions.Regex.Unescape(s);
               string stringInBase64 = s.Replace("{\"errno\":0,\"msg\":\"success\",\"data\":\"data:audio/x-mpeg;base64,","").Replace("\"}","");
               byte[] bytes = System.Convert.FromBase64String(stringInBase64);
               WriteByteToFile(bytes, "temp.mp3"); //保存本地文件后可用 MediaElement 组件来播放。
             //  playAudio(bytes);//播放声音，如果不是WAV格式的流会失败。
             //  PlaySound(md,AppDomain.CurrentDomain.BaseDirectory + "\\temp.mp3");

           }

           return s;
       }

        /// <summary>
        /// 写byte[]到fileName
        /// </summary>
        /// <param name="pReadByte">byte[]</param>
        /// <param name="fileName">保存至硬盘路径</param>
        /// <returns></returns>
         static bool WriteByteToFile(byte[] pReadByte, string fileName)
        {
            FileStream pFileStream = null;
            try
            {
                pFileStream = new FileStream(fileName, FileMode.OpenOrCreate);
                pFileStream.Write(pReadByte, 0, pReadByte.Length);
            }
            catch
            {
                return false;
            }
            finally
            {
                if (pFileStream != null)
                    pFileStream.Close();
            }
            return true;
        }

      static  void  playAudio(byte[] data)
       {
           MemoryStream ms = new MemoryStream(data);
           ms.Position = 0;
           System.Media.SoundPlayer player = new System.Media.SoundPlayer();
           player.Stream = ms;
           player.LoadAsync();
           player.Play();//The wave header is corrupt. 说明这个不是WAV格式文件流

       }

      static  void PlaySound(MediaElement md ,string url)
      {
              md.LoadedBehavior = MediaState.Manual;
              md.IsEnabled = true;
              md.Stop();
              md.Source = null;
              md.Source = new Uri(url);
              md.Play();

      }

    }

   public class HttpHelper2 {

       CookieContainer myCookieContainer = new CookieContainer();
       public static string httpPost(string url, string post)
       {
           string s = "";
           try
           {
               byte[] data = Encoding.ASCII.GetBytes(post);
               HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
               req.Method = "POST";
               req.Headers.Add("Cookie", "BAIDUID=CA97D41AACE2AD8A2750225E9F53C9BA:FG=1; BIDUPSID=CA97D41AACE2AD8A2750225E9F53C9BA; PSTM=1562830960; BDUSS=1Vib0ZXRjlqYnBmNG1SaW4wZjJ0SE0wRW40MXhJdE1JT01RQmk5QmtoMzB2VmRkSVFBQUFBJCQAAAAAAAAAAAEAAADSJwUAd2dzY2QAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAPQwMF30MDBdN; H_WISE_SIDS=126894_127760_132206_132550_133721_120202_133016_132911_133041_131246_132439_130762_132378_131518_118889_118863_118845_118826_118787_107320_133159_132780_134393_133352_129647_134434_124636_128968_132540_133837_133473_131906_133838_133847_132552_134460_133424_134319_134214_129645_131423_134345_133587_110085_134152_127969_131299_127318_127417_134150_133668_134352; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; delPer=0; H_PS_PSSID=29716_1446_21115_29523_29520_29721_29568_29220; PSINO=6; Hm_lvt_8b973192450250dd85b9011320b455ba=1567135060; Hm_lpvt_8b973192450250dd85b9011320b455ba=1567135060");
               req.ContentType = "application/x-www-form-urlencoded";
               req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36";
               req.Referer = "http://ai.baidu.com/tech/speech/tts?track=cp:ainsem|pf:pc|pp:chanpin-yuyin|pu:yuyin-yuyinhecheng-pinpai|ci:|kw:10003541";
               req.ContentLength = data.Length;
               req.GetRequestStream().Write(data, 0, data.Length);
               // req.CookieContainer = myCookieContainer;
               HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
              // myCookieContainer.Add(resp.Cookies);
               StreamReader r = new StreamReader(resp.GetResponseStream());
               s = r.ReadToEnd();
               r.Close();
               resp.Close();
               req.Abort();

           }
           catch (Exception ex)
           {

               s = ex.Message;

           }

           return s;
       }

   }

}