SpeechRecognitionEngine.RecognizeAsyncStop Metode

Definisi

Ruang nama:

System.Speech.Recognition

Rakitan:

System.Speech.dll

Paket:

System.Speech v9.0.0-preview.4.24266.19

Sumber:

SpeechRecognitionEngine.cs

Menghentikan pengenalan asinkron setelah operasi pengenalan saat ini selesai.

public:
 void RecognizeAsyncStop();

public void RecognizeAsyncStop ();

member this.RecognizeAsyncStop : unit -> unit

Public Sub RecognizeAsyncStop ()

Contoh

Contoh berikut menunjukkan bagian dari aplikasi konsol yang menunjukkan penggunaan RecognizeAsyncStop metode . Contoh membuat dan memuat tata bahasa pengenalan ucapan, memulai operasi pengenalan asinkron yang berkelanjutan, lalu menjeda 2 detik sebelum menghentikan operasi. Recognizer menerima input dari file, c:\temp\audioinput\sample.wav. Penanganan aktivitas disertakan untuk menunjukkan peristiwa yang diangkat pengenal selama operasi.

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;  
    }  
  }  
}  

Keterangan

Metode ini menyelesaikan pengenalan asinkron tanpa memotong input. Jika operasi pengenalan asinkron saat ini menerima input, pengenal terus menerima input hingga operasi pengenalan saat ini selesai. Recognizer menaikkan RecognizeCompleted atau EmulateRecognizeCompleted peristiwa ketika operasi asinkron dihentikan, dan mengatur Cancelled properti dari RecognizeCompletedEventArgs ke true. Metode ini menghentikan operasi asinkron yang dimulai oleh RecognizeAsync metode dan EmulateRecognizeAsync .

Untuk segera membatalkan pengenalan asinkron hanya dengan input yang ada, gunakan metode .RecognizeAsyncCancel

Lihat juga

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