SpeechRecognitionEngine.AudioStateChanged SpeechRecognitionEngine.AudioStateChanged SpeechRecognitionEngine.AudioStateChanged SpeechRecognitionEngine.AudioStateChanged Event

定義

オーディオの状態変化が SpeechRecognitionEngine によって受け取られるときに発生します。Raised when the state changes in the audio being received by the 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) 

次の例では、 AudioStateChangedイベントのハンドラーを使用して、変更するたびに、 AudioState列挙体のメンバーを使用して、レコグナイザーの新しいAudioStateをコンソールに書き込みます。The following example uses a handler for the AudioStateChanged event to write the recognizer's new AudioState to the console each time it changes, using a member of the AudioState enumeration.

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);  
    }  
  }  
}  

注釈

イベント時にオーディオの状態を取得するには、関連付けAudioStateられているAudioStateChangedEventArgsのプロパティを使用します。To get the audio state at the time of the event, use the AudioState property of the associated AudioStateChangedEventArgs. 認識エンジンへの入力の現在のオーディオの状態を取得するには、 AudioStateレコグナイザーのプロパティを使用します。To get the current audio state of the input to the recognizer, use the recognizer's AudioState property. オーディオ状態の詳細については、 AudioState 「列挙体」を参照してください。For more information about audio state, see the AudioState enumeration.

AudioStateChanged デリゲートを作成する場合は、イベントを処理するメソッドを指定します。When you create an AudioStateChanged delegate, you identify the method that will handle the event. イベントをイベント ハンドラーに関連付けるには、デリゲートのインスタンスをイベントに追加します。To associate the event with your event handler, add an instance of the delegate to the event. デリゲートを削除しない限り、そのイベントが発生すると常にイベント ハンドラーが呼び出されます。The event handler is called whenever the event occurs, unless you remove the delegate. イベントハンドラーデリゲートの詳細については、「イベントとデリゲート」を参照してください。For more information about event-handler delegates, see Events and Delegates.

適用対象

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