识别语音的Windows服务

Question

是否可以使用c＃创建Windows服务，该服务将在后台运行并识别用户的语音并根据Alexa的命令执行某些操作？ 我创建了一个可以识别用户语音的应用程序，但无法通过Windows服务产生相同的结果。 当我运行服务时，事件查看器显示服务已成功启动，但是当我说任何命令服务时，它什么也没做。那就是它不在函数recEngine_SpeechRecognized（）中。我检查了语法是否已成功加载，并且该服务也能够为任何文本合成语音，但是它无法识别任何语音，不确定在这里我在做什么错。

请在下面找到我尝试创建的Windows服务的代码。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using System.Timers;
using System.Speech.Recognition;
using System.Speech.Synthesis;
namespace WindowsService1
{
    public partial class Service1 : ServiceBase
    {
        Timer timer = new Timer(); // name space(using System.Timers;)  
        SpeechRecognitionEngine recEngine = new SpeechRecognitionEngine();
        SpeechSynthesizer synthesizer = new SpeechSynthesizer();
        public Service1()
        {
            InitializeComponent();
        }
        protected override void OnStart(string[] args)
        {
            WriteToFile("Service is started at " + DateTime.Now);
            SpeechRecog();
            timer.Elapsed += new ElapsedEventHandler(OnElapsedTime);
            timer.Interval = 5000; //number in milisecinds  
            timer.Enabled = true;
        }
        protected override void OnStop()
        {
            recEngine.RecognizeAsyncStop();
            WriteToFile("Service is stopped at " + DateTime.Now);
        }
        private void OnElapsedTime(object source, ElapsedEventArgs e)
        {
            WriteToFile("Service is recall at " + DateTime.Now);
        }

        public void SpeechRecog()
        {

            WriteToFile("Inside Speech recog " + DateTime.Now);
            Choices commands = new Choices();
            commands.Add(new string[] { "say hello", "print my name" });
            GrammarBuilder gBuilder = new GrammarBuilder();
            gBuilder.Append(commands);
            Grammar grammar = new Grammar(gBuilder);
            recEngine.LoadGrammarAsync(grammar);
            recEngine.LoadGrammarCompleted += LoadGrammarCompleted;
            recEngine.SetInputToDefaultAudioDevice();
            recEngine.SpeechRecognized += recEngine_SpeechRecognized;
            recEngine.RecognizeAsync(RecognizeMode.Multiple);
            //recEngine.EmulateRecognize("say hello");
        }

        private void LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
        {
            WriteToFile("Grammar loaded " + DateTime.Now);
        }

        private void recEngine_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
        {
            WriteToFile("Speech recognized " + e.Result.Text + "  " + DateTime.Now);
            switch (e.Result.Text)
            {
                case "say hello": synthesizer.SpeakAsync("Hello Sayam");
                    WriteToFile("Hello sayam");
                    break;
                case "say my name":
                    synthesizer.SpeakAsync("Sayam");
                    break;
            }
        }

        public void WriteToFile(string Message)
        {
            string path = AppDomain.CurrentDomain.BaseDirectory + "\\Logs";
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
            string filepath = AppDomain.CurrentDomain.BaseDirectory + "\\Logs\\ServiceLog_" + DateTime.Now.Date.ToShortDateString().Replace('/', '_') + ".txt";
            if (!File.Exists(filepath))
            {
                // Create a file to write to.   
                using (StreamWriter sw = File.CreateText(filepath))
                {
                    sw.WriteLine(Message);
                }
            }
            else
            {
                using (StreamWriter sw = File.AppendText(filepath))
                {
                    sw.WriteLine(Message);
                }
            }
        }
    }
}