System.Speech识别错误(System.Speech recognition error)

我写使用system.speech从MS语音识别程序。 我一直在经历的在线教程和StackOverflow上所有伟大的信息，但是我似乎继续运行到一个问题，即识别似乎抛出一个错误。

下面是我使用的代码（减去语法创建）。

Grammar grammarQuestionsSingle;
Grammar grammarQuestionsShort;
Grammar grammarQuestionsLong;
Grammar grammarStatement;
//Grammar grammarDeclarationShort;
//Grammar grammarDeclarationLong;
Grammar grammarCommandsSingle;
Grammar grammarCommandsShort;
Grammar grammarCommandsLong;

SpeechRecognitionEngine recognizer = new SpeechRecognitionEngine();
CreateGrammar grammar = new CreateGrammar();
Think brain = new Think();
bool privacy, completed;
//bool timer;


public void OpenEars()
{
    completed = true;
    if (grammarQuestionsSingle == null || grammarQuestionsShort == null || grammarQuestionsLong == null || grammarStatement == null || grammarCommandsSingle == null || grammarCommandsShort == null || grammarCommandsLong == null)
    {
        grammarQuestionsSingle = grammar.createGrammarQuestionsSingle();
        grammarQuestionsShort = grammar.createGrammarQuestionsShort();
        grammarQuestionsLong = grammar.createGrammarQuestionsLong();
        grammarStatement = grammar.createGrammarStatement();
        grammarCommandsSingle = grammar.createGrammarCommandsSingle();
        grammarCommandsShort = grammar.createGrammarCommandsShort();
        grammarCommandsLong = grammar.createGrammarCommandsLong();
    }
    recognizer.RequestRecognizerUpdate();
    if (!grammarQuestionsSingle.Loaded)
    {
        recognizer.LoadGrammar(grammarQuestionsSingle);
    }
    if (!grammarQuestionsShort.Loaded)
    {
        recognizer.LoadGrammar(grammarQuestionsShort);
    }
    if (!grammarQuestionsLong.Loaded)
    {
        recognizer.LoadGrammar(grammarQuestionsLong);
    }
    if (!grammarStatement.Loaded)
    {
        recognizer.LoadGrammar(grammarStatement);
    }
    if (!grammarCommandsSingle.Loaded)
    {
        recognizer.LoadGrammar(grammarCommandsSingle);
    }
    if (!grammarCommandsShort.Loaded)
    {
        recognizer.LoadGrammar(grammarCommandsShort);
    }
    if (!grammarCommandsLong.Loaded)
    {
        recognizer.LoadGrammar(grammarCommandsLong);
    }
    DictationGrammar dictationGrammar = new DictationGrammar("grammar:dictation");
    dictationGrammar.Name = "DictationQuestion";
    recognizer.LoadGrammar(dictationGrammar);
    recognizer.RequestRecognizerUpdate();
    recognizer.SetInputToDefaultAudioDevice();
    Listening();
}

public void Listening()
{
    while (!completed)
    {
        Thread.Sleep(333);
    }
    recognizer.SpeechRecognized += recognizer_SpeechRecognized;
    recognizer.RecognizeAsync(RecognizeMode.Single);
}

private void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
    completed = false;
    SemanticValue sem = e.Result.Semantics;
    if (!privacy)
    {
        if (e.Result.Grammar.Name=="CommandsSingle" && sem["keyCommandsSingle"].Value.ToString() == "go to sleep")
        {
            privacy = true;
            brain.useMouth("ear muffs are on");
            completed = true;
            Listening();
        }
        else
        {
            brain.Understanding(sender, e);
            completed = true;
        }
    }
    else
    {
        if (e.Result.Grammar.Name == "CommandsSingle" && sem["keyCommandsSingle"].Value.ToString() == "wake up")
        {
            privacy = false;
            brain.useMouth("I am listening again");
            completed = true;
            Listening();
        }
    }
    completed = true;
    Listening();
}
}

它正确，但只要认识到第一阶段，因为它完成的speechrecognized处理器的操作，它会抛出异常“而识别是做肯定无法执行此操作。” 我曾尝试与识别正在然而，它具有相同的结果，一个单一的方法都。 这是我最近张贴了这个问题之前尝试。 我究竟做错了什么？

作为澄清...

该程序启动到系统托盘，并调用这个class.OpenEars（）。 OpenEars然后调用它具有RecognizeAsync class.Listening（）。 正确地说前半句和识别听到它并按照处理程序后，说话时的第二句话最终引发了异常。

Answer 1:

问题是，你是从SpeechRecognized事件处理程序调用RecognizeAsync。 它抛出异常，因为之前的识别尚未完成。 事件处理程序无法完成阻止它。 开始尝试不同的任务/线程调用RecognizeAsync。

文章来源: System.Speech recognition error