使用Google Speech API

在基于C＃的应用程序中实现Google Speech API的代码是什么？我发现可以创建一个音频文件并将其发送到http://slides.html5rocks.com/#speech-input并以文本形式接收。如果您以前尝试过此方法，可以请您说明如何执行此操作或向我提供代码吗？现在被困在这里了一段时间

非常感激。

到目前为止的代码：

    SpeechRecognitionEngine rec = new SpeechRecognitionEngine();
    SpeechSynthesizer dummy = new SpeechSynthesizer();


    public Form1()
    {
        InitializeComponent();


        Choices searching = new Choices("Porsche");
        GrammarBuilder searchService = new GrammarBuilder("Search");

        searchService.Append(searching);


        // Create a Grammar object from the GrammarBuilder and load it to the  recognizer.
        Grammar googleGrammar = new Grammar(searchService); ;
        rec.RequestRecognizerUpdate();
        rec.LoadGrammar(googleGrammar);

        // Add a handler for the speech recognized event.
        rec.SpeechRecognized +=
          new EventHandler<SpeechRecognizedEventArgs>(_recognizer_SpeechRecognized);

        // Configure the input to the speech recognizer.
        rec.SetInputToDefaultAudioDevice();

        // Start asynchronous, continuous speech recognition.
        rec.RecognizeAsync(RecognizeMode.Multiple);
    }




    private void _recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {

        try
        {
            FileStream FS_Audiofile = new FileStream("temp.flac", FileMode.Open, FileAccess.Read);
            BinaryReader BR_Audiofile = new BinaryReader(FS_Audiofile);
            byte[] BA_AudioFile = BR_Audiofile.ReadBytes((Int32)FS_Audiofile.Length);
            FS_Audiofile.Close();
            BR_Audiofile.Close();

            HttpWebRequest _HWR_SpeechToText = null;

            _HWR_SpeechToText = (HttpWebRequest)WebRequest.Create("http://www.google.com/speech-api/v1/recognize?xjerr=1&client=chromium&lang=de-DE&maxresults=1&pfilter=0");

            _HWR_SpeechToText.Method = "POST";
            _HWR_SpeechToText.ContentType = "audio/x-flac; rate=44100";
            _HWR_SpeechToText.ContentLength = BA_AudioFile.Length;
            _HWR_SpeechToText.GetRequestStream().Write(BA_AudioFile, 0, BA_AudioFile.Length);

            HttpWebResponse HWR_Response = (HttpWebResponse)_HWR_SpeechToText.GetResponse();
            if (HWR_Response.StatusCode == HttpStatusCode.OK)
            {
                StreamReader SR_Response = new StreamReader(HWR_Response.GetResponseStream());
                textBox1.Text = SR_Response.ToString();

            }

        }
        catch (Exception ex)
        {

        }  
    }

这不会从Google返回任何值。