（二）语音合成测试案例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Speech.Synthesis;

namespace Synthesis
{
    public partial class FrmMain : Form
    {
        //语音合成引擎
        private SpeechSynthesizer speechSynthesizer;

        public FrmMain()
        {
            InitializeComponent();
            this.speechSynthesizer = new SpeechSynthesizer();
        }

        private void FrmMain_Load(object sender, EventArgs e)
        {
            //获取系统已安装的语音库列表
            var voiceList = (from item in this.speechSynthesizer.GetInstalledVoices() select item.VoiceInfo.Name).ToList();
            this.cmbVoice.DataSource = voiceList;
            //var voiceList = this.speechSynthesizer.GetInstalledVoices();
            //foreach (var item in voiceList)
            //{
            //    this.cmbVoice.Items.Add(item.VoiceInfo.Name);
            //}
            //this.cmbVoice.SelectedIndex = 0;

            this.speechSynthesizer.Rate = 0; //语速值范围： -10 到 10
            this.speechSynthesizer.Volume = 100; //声音大小值范围： 0 到 100
            this.speechSynthesizer.SelectVoice(this.cmbVoice.Text); //设置用于合成的语音库
        }

        private void cmbVoice_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.speechSynthesizer.SelectVoice(this.cmbVoice.Text);  //改变当前语音库
        }

        private void btnSpeak_Click(object sender, EventArgs e)
        {
            //this.speechSynthesizer.SpeakAsync(this.txtContent.Text);
            this.speechSynthesizer.Speak(this.txtContent.Text);  //将文本合成语音
        }
    }
}