SpeechRecognitionEngine.RecognizeAsyncStop Méthode

Définition

Espace de noms:

System.Speech.Recognition

Assembly:

System.Speech.dll

Paquet:

System.Speech v9.0.0-preview.3.24172.9

Source:

SpeechRecognitionEngine.cs

Arrête la reconnaissance asynchrone lorsque l'opération de reconnaissance active se termine.

public:
 void RecognizeAsyncStop();

public void RecognizeAsyncStop ();

member this.RecognizeAsyncStop : unit -> unit

Public Sub RecognizeAsyncStop ()

Exemples

L’exemple suivant montre une partie d’une application console qui illustre l’utilisation de la RecognizeAsyncStop méthode . L’exemple crée et charge une grammaire de reconnaissance vocale, lance une opération de reconnaissance asynchrone continue, puis met en pause 2 secondes avant d’arrêter l’opération. Le module de reconnaissance reçoit l’entrée du fichier c:\temp\audioinput\sample.wav. Les gestionnaires d’événements sont inclus pour illustrer les événements que le module de reconnaissance déclenche pendant l’opération.

using System;  
using System.Globalization;  
using System.Speech.Recognition;  
using System.Threading;  

namespace AsynchronousRecognition  
{  
  class Program  
  {  
    // Indicate whether asynchronous recognition is complete.  
    static bool completed;  

    static void Main(string[] args)  
    {  
      // Create an in-process speech recognizer.  
      using (SpeechRecognitionEngine recognizer =  
        new SpeechRecognitionEngine(new CultureInfo("en-US")))  
      {  
        // Create and load a dictation grammar.  
        Grammar dictation = new DictationGrammar();  
        dictation.Name = "Dictation Grammar";  

        recognizer.LoadGrammar(dictation);  

        // Attach event handlers.  
        recognizer.SpeechDetected +=  
          new EventHandler<SpeechDetectedEventArgs>(  
            SpeechDetectedHandler);  
        recognizer.SpeechHypothesized +=  
          new EventHandler<SpeechHypothesizedEventArgs>(  
            SpeechHypothesizedHandler);  
        recognizer.SpeechRecognitionRejected +=  
          new EventHandler<SpeechRecognitionRejectedEventArgs>(  
            SpeechRecognitionRejectedHandler);  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(  
            SpeechRecognizedHandler);  
        recognizer.RecognizeCompleted +=  
          new EventHandler<RecognizeCompletedEventArgs>(  
            RecognizeCompletedHandler);  

        // Begin asynchronous recognition from pre-recorded input.  
        recognizer.SetInputToWaveFile(@"c:\temp\audioinput\sample.wav");  

        completed = false;  
        Console.WriteLine("Begin continuing asynchronous recognition...");  
        recognizer.RecognizeAsync(RecognizeMode.Multiple);  

        // Wait 2 seconds and then stop the recognition operation.  
        Thread.Sleep(TimeSpan.FromSeconds(2));  
        recognizer.RecognizeAsyncStop();  

        // Wait for the operation to complete.  
        while (!completed)  
        {  
          Thread.Sleep(333);  
        }  

        Console.WriteLine("Done.");  
      }  

      Console.WriteLine();  
      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  

    // Handle the SpeechDetected event.  
    static void SpeechDetectedHandler(object sender, SpeechDetectedEventArgs e)  
    {  
      Console.WriteLine(" In SpeechDetectedHandler:");  
      Console.WriteLine(" - AudioPosition = {0}", e.AudioPosition);  
    }  

    // Handle the SpeechHypothesized event.  
    static void SpeechHypothesizedHandler(  
      object sender, SpeechHypothesizedEventArgs e)  
    {  
      Console.WriteLine(" In SpeechHypothesizedHandler:");  

      string grammarName = "<not available>";  
      string resultText = "<not available>";  
      if (e.Result != null)  
      {  
        if (e.Result.Grammar != null)  
        {  
          grammarName = e.Result.Grammar.Name;  
        }  
        resultText = e.Result.Text;  
      }  

      Console.WriteLine(" - Grammar Name = {0}; Result Text = {1}",  
        grammarName, resultText);  
    }  

    // Handle the SpeechRecognitionRejected event.  
    static void SpeechRecognitionRejectedHandler(  
      object sender, SpeechRecognitionRejectedEventArgs e)  
    {  
      Console.WriteLine(" In SpeechRecognitionRejectedHandler:");  

      string grammarName = "<not available>";  
      string resultText = "<not available>";  
      if (e.Result != null)  
      {  
        if (e.Result.Grammar != null)  
        {  
          grammarName = e.Result.Grammar.Name;  
        }  
        resultText = e.Result.Text;  
      }  

      Console.WriteLine(" - Grammar Name = {0}; Result Text = {1}",  
        grammarName, resultText);  
    }  

    // Handle the SpeechRecognized event.  
    static void SpeechRecognizedHandler(  
      object sender, SpeechRecognizedEventArgs e)  
    {  
      Console.WriteLine(" In SpeechRecognizedHandler.");  

      string grammarName = "<not available>";  
      string resultText = "<not available>";  
      if (e.Result != null)  
      {  
        if (e.Result.Grammar != null)  
        {  
          grammarName = e.Result.Grammar.Name;  
        }  
        resultText = e.Result.Text;  
      }  

      Console.WriteLine(" - Grammar Name = {0}; Result Text = {1}",  
        grammarName, resultText);  
    }  

    // Handle the RecognizeCompleted event.  
    static void RecognizeCompletedHandler(  
      object sender, RecognizeCompletedEventArgs e)  
    {  
      Console.WriteLine(" In RecognizeCompletedHandler.");  

      if (e.Error != null)  
      {  
        Console.WriteLine(  
          " - Error occurred during recognition: {0}", e.Error);  
        return;  
      }  
      if (e.Cancelled)  
      {  
        Console.WriteLine(" - asynchronous operation canceled.");  
      }  
      if (e.InitialSilenceTimeout || e.BabbleTimeout)  
      {  
        Console.WriteLine(  
          " - BabbleTimeout = {0}; InitialSilenceTimeout = {1}",  
          e.BabbleTimeout, e.InitialSilenceTimeout);  
        return;  
      }  
      if (e.InputStreamEnded)  
      {  
        Console.WriteLine(  
          " - AudioPosition = {0}; InputStreamEnded = {1}",  
          e.AudioPosition, e.InputStreamEnded);  
      }  
      if (e.Result != null)  
      {  
        Console.WriteLine(  
          " - Grammar = {0}; Text = {1}; Confidence = {2}",  
          e.Result.Grammar.Name, e.Result.Text, e.Result.Confidence);  
      }  
      else  
      {  
        Console.WriteLine(" - No result.");  
      }  

      completed = true;  
    }  
  }  
}  

Remarques

Cette méthode finalise la reconnaissance asynchrone sans tronquer l’entrée. Si l’opération de reconnaissance asynchrone actuelle reçoit une entrée, le module de reconnaissance continue d’accepter l’entrée jusqu’à ce que l’opération de reconnaissance actuelle soit terminée. Le module de reconnaissance déclenche l’événement RecognizeCompleted ou lorsqu’une opération asynchrone est arrêtée et définit la Cancelled propriété de sur RecognizeCompletedEventArgstrue.EmulateRecognizeCompleted Cette méthode arrête les opérations asynchrones initiées par les RecognizeAsync méthodes et EmulateRecognizeAsync .

Pour annuler immédiatement la reconnaissance asynchrone avec uniquement l’entrée existante, utilisez la RecognizeAsyncCancel méthode .

Voir aussi

• EmulateRecognizeAsync(String)
• RecognizeAsync()
• RecognizeAsyncCancel()
• RecognizeCompleted
• EmulateRecognizeCompleted