SpeechRecognitionEngine.AudioStateChanged Kejadian

Definisi

Ruang nama:

System.Speech.Recognition

Rakitan:

System.Speech.dll

Paket:

System.Speech v9.0.0-rc.2.24473.5

Sumber:

SpeechRecognitionEngine.cs

Dimunculkan saat status berubah dalam audio yang diterima oleh SpeechRecognitionEngine.

public:
 event EventHandler<System::Speech::Recognition::AudioStateChangedEventArgs ^> ^ AudioStateChanged;

public event EventHandler<System.Speech.Recognition.AudioStateChangedEventArgs> AudioStateChanged;

member this.AudioStateChanged : EventHandler<System.Speech.Recognition.AudioStateChangedEventArgs> 

Public Custom Event AudioStateChanged As EventHandler(Of AudioStateChangedEventArgs) 

Jenis Acara

EventHandler<AudioStateChangedEventArgs>

Contoh

Contoh berikut menggunakan handler untuk AudioStateChanged peristiwa untuk menulis recognizer yang baru AudioState ke konsol setiap kali berubah, menggunakan anggota AudioState enumerasi.

using System;  
using System.Speech.Recognition;  

namespace SampleRecognition  
{  
  class Program  
  {  
    static void Main(string[] args)  

    // Initialize an in-process speech recognition engine.  
    {  
      using (SpeechRecognitionEngine recognizer =  
         new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US")))  
      {  

        // Create and load a grammar.  
        Choices animals = new Choices(new string[] { "cow", "pig", "goat" });  
        GrammarBuilder farm = new GrammarBuilder("On this farm he had a");  
        farm.Append(animals);  
        Grammar farmAnimals = new Grammar(farm);  
        farmAnimals.Name = "Farm";  
        recognizer.LoadGrammar(farmAnimals);  

        // Attach event handlers.  
        recognizer.AudioStateChanged +=  
          new EventHandler<AudioStateChangedEventArgs>(recognizer_AudioStateChanged);  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  
        recognizer.LoadGrammarCompleted +=  
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);  

        // Set the input to the recognizer.  
        recognizer.SetInputToDefaultAudioDevice();  

        // Start recognition.  
        recognizer.RecognizeAsync();  

        // Keep the console window open.  
        Console.ReadLine();  
      }  
    }  

    // Handle the LoadGrammarCompleted event.  
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)  
    {  
      Console.WriteLine("Grammar loaded: " + e.Grammar.Name);  
    }  

    // Handle the SpeechRecognized event.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      if (e.Result != null && e.Result.Text != null)  
      {  
        Console.WriteLine();  
        Console.WriteLine("  Recognized text =  {0}", e.Result.Text);  
        Console.WriteLine();  
      }  
      else  
      {  
        Console.WriteLine("  Recognized text not available.");  
      }  

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

    // Handle the AudioStateChanged event.  
    static void recognizer_AudioStateChanged(object sender, AudioStateChangedEventArgs e)  
    {  
      Console.WriteLine("The new audio state is: " + e.AudioState);  
    }  
  }  
}  

Keterangan

Untuk mendapatkan status audio pada saat peristiwa, gunakan AudioState properti dari yang terkait AudioStateChangedEventArgs. Untuk mendapatkan status audio input saat ini ke recognizer, gunakan properti recognizer AudioState . Untuk informasi selengkapnya tentang status audio, lihat AudioState enumerasi.

Saat membuat AudioStateChanged delegasi, Anda mengidentifikasi metode yang akan menangani peristiwa. Untuk mengaitkan peristiwa dengan penanganan aktivitas Anda, tambahkan instans delegasi ke peristiwa. Penanganan aktivitas dipanggil setiap kali peristiwa terjadi, kecuali Jika Anda menghapus delegasi. Untuk informasi selengkapnya tentang delegasi penanganan aktivitas, lihat Peristiwa dan Delegasi.

Lihat juga

• AudioState
• AudioStateChangedEventArgs
• AudioState