using System;
using System.Collections.Generic;
using System.Linq;
using System.Speech.Recognition;
using System.Text;
using System.Threading.Tasks;
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;

namespace TestWPFAnimation
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Loaded += MainWindow_Loaded;
        }

        SpeechRecognitionEngine recEngine = new SpeechRecognitionEngine();

        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            Choices preCmd = new Choices();
            preCmd.Add(new string[] { "name", "age" });
            GrammarBuilder gb = new GrammarBuilder();
            gb.Append(preCmd);
            Grammar gr = new Grammar(gb);
            recEngine.LoadGrammarAsync(gr);
            recEngine.SetInputToDefaultAudioDevice();
            recEngine.SpeechRecognized += recEngine_SpeechRecognized;
        }

       
        private void btnEnable_Click(object sender, RoutedEventArgs e)
        {
          
            recEngine.RecognizeAsync(RecognizeMode.Multiple);
            btnDisable.IsEnabled = true;
        }

        void recEngine_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            switch (e.Result.Text)
            {
                case "name":
                    txt.Text += "Darren";
                    break;
                case "age":
                    txt.Text += "21";
                    break;
                default:
                    txt.Text = e.Result.Text;
                    break;

            }

        }
        private void btnDisable_Click(object sender, RoutedEventArgs e)
        {
            recEngine.RecognizeAsyncStop();
            btnDisable.IsEnabled = false;
        }




    }
}

　　

参考：https://www.cnblogs.com/darrenji/p/4373664.html