SpeechRecognitionEngine.RecognizerUpdateReached イベント

定義

変更を受け入れるために実行中の SpeechRecognitionEngine を一時停止すると発生します。Raised when a running SpeechRecognitionEngine pauses to accept modifications.

public:
 event EventHandler<System::Speech::Recognition::RecognizerUpdateReachedEventArgs ^> ^ RecognizerUpdateReached;
public event EventHandler<System.Speech.Recognition.RecognizerUpdateReachedEventArgs> RecognizerUpdateReached;
member this.RecognizerUpdateReached : EventHandler<System.Speech.Recognition.RecognizerUpdateReachedEventArgs> 
Public Custom Event RecognizerUpdateReached As EventHandler(Of RecognizerUpdateReachedEventArgs) 
Public Event RecognizerUpdateReached As EventHandler(Of RecognizerUpdateReachedEventArgs) 

イベントの種類

EventHandler<RecognizerUpdateReachedEventArgs>

次の例は、オブジェクトの読み込みとアンロードを行うコンソールアプリケーションを示して Grammar います。The following example shows a console application that loads and unloads Grammar objects. アプリケーションでは、メソッドを使用して RequestRecognizerUpdate 音声認識エンジンが一時停止するように要求し、更新プログラムを受信できるようにします。The application uses the RequestRecognizerUpdate method to request the speech recognition engine to pause so it can receive an update. その後、アプリケーションはオブジェクトを読み込んだりアンロードしたりし Grammar ます。The application then loads or unloads a Grammar object.

各更新時に、イベントのハンドラーによって、 RecognizerUpdateReached 現在読み込まれているオブジェクトの名前と状態が Grammar コンソールに書き込まれます。At each update, a handler for RecognizerUpdateReached event writes the name and status of the currently loaded Grammar objects to the console. 文法が読み込まれてアンロードされると、アプリケーションは最初にファームの動物の名前、次にファームの動物の名前と果物の名前を認識し、次に果物の名前のみを認識します。As grammars are loaded and unloaded, the application first recognizes the names of farm animals, then the names of farm animals and the names of fruits, then only the names of fruits.

using System;  
using System.Speech.Recognition;  
using System.Collections.Generic;  
using System.Threading;  

namespace SampleRecognition  
{  
  class Program  
  {  
    private static SpeechRecognitionEngine recognizer;  
    public static void Main(string[] args)  
    {  

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

        // Create the first grammar - Farm.  
        Choices animals = new Choices(new string[] { "cow", "pig", "goat" });  
        GrammarBuilder farm = new GrammarBuilder(animals);  
        Grammar farmAnimals = new Grammar(farm);  
        farmAnimals.Name = "Farm";  

        // Create the second grammar - Fruit.  
        Choices fruit = new Choices(new string[] { "apples", "peaches", "oranges" });  
        GrammarBuilder favorite = new GrammarBuilder(fruit);  
        Grammar favoriteFruit = new Grammar(favorite);  
        favoriteFruit.Name = "Fruit";  

        // Attach event handlers.  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  
        recognizer.RecognizerUpdateReached +=  
          new EventHandler<RecognizerUpdateReachedEventArgs>(recognizer_RecognizerUpdateReached);  
        recognizer.SpeechRecognitionRejected +=  
          new EventHandler<SpeechRecognitionRejectedEventArgs>(recognizer_SpeechRecognitionRejected);  

        // Load the Farm grammar.  
        recognizer.LoadGrammar(farmAnimals);  

        // Start asynchronous, continuous recognition.  
        recognizer.RecognizeAsync(RecognizeMode.Multiple);  
        Console.WriteLine("Starting asynchronous, continuous recognition");  
        Console.WriteLine("  Farm grammar is loaded and enabled.");  

        // Pause to recognize farm animals.  
        Thread.Sleep(7000);  
        Console.WriteLine();  

        // Request an update and load the Fruit grammar.  
        recognizer.RequestRecognizerUpdate();  
        recognizer.LoadGrammarAsync(favoriteFruit);  
        Thread.Sleep(7000);  

        // Request an update and unload the Farm grammar.  
        recognizer.RequestRecognizerUpdate();  
        recognizer.UnloadGrammar(farmAnimals);  
        Thread.Sleep(7000);  
      }  

      // Keep the console window open.  
      Console.WriteLine();  
      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  

    // At the update, get the names and enabled status of the currently loaded grammars.  
    public static void recognizer_RecognizerUpdateReached(  
      object sender, RecognizerUpdateReachedEventArgs e)  
    {  
      Console.WriteLine();  
      Console.WriteLine("Update reached:");  
      Thread.Sleep(1000);  

      string qualifier;  
      List<Grammar> grammars = new List<Grammar>(recognizer.Grammars);  
      foreach (Grammar g in grammars)  
      {  
        qualifier = (g.Enabled) ? "enabled" : "disabled";  
        Console.WriteLine("  {0} grammar is loaded and {1}.",  
        g.Name, qualifier);  
      }  
    }  

    // Write the text of the recognized phrase to the console.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      Console.WriteLine("    Speech recognized: " + e.Result.Text);  
    }  

    // Write a message to the console when recognition fails.  
    static void recognizer_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)  
    {  
      Console.WriteLine("    Recognition attempt failed");  
    }  
  }  
}  

注釈

アプリケーションは RequestRecognizerUpdate SpeechRecognitionEngine 、の設定またはオブジェクトを変更する前に、を使用しての実行中のインスタンスを一時停止する必要があり Grammar ます。Applications must use RequestRecognizerUpdate to pause a running instance of SpeechRecognitionEngine before modifying its settings or its Grammar objects. は、 SpeechRecognitionEngine 変更を受け入れる準備が整ったときにこのイベントを発生させます。The SpeechRecognitionEngine raises this event when it is ready to accept modifications.

たとえば、 SpeechRecognitionEngine が一時停止されている間に、オブジェクトの読み込み、アンロード、有効化、および無効化を行ったり、 Grammar 、、の各プロパティの値を変更したりでき BabbleTimeout InitialSilenceTimeout EndSilenceTimeout ます。For example, while the SpeechRecognitionEngine is paused, you can load, unload, enable, and disable Grammar objects, and modify values for the BabbleTimeout, InitialSilenceTimeout, and EndSilenceTimeout properties. 詳細については、RequestRecognizerUpdate メソッドを参照してください。For more information, see the RequestRecognizerUpdate method.

RecognizerUpdateReached 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 a RecognizerUpdateReached delegate, you identify the method that will handle the event. イベント ハンドラーにイベントを関連付けるには、イベントにデリゲートのインスタンスを追加します。To associate the event with your event handler, add an instance of the delegate to the event. イベント ハンドラーは、デリゲートを削除しない限り、イベントが発生するたびに呼び出されます。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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