SpeechRecognizer.RecognizerUpdateReached 事件

定義

命名空間:

System.Speech.Recognition

組件:

System.Speech.dll

套件:

System.Speech v9.0.0-rc.2.24473.5

來源:

SpeechRecognizer.cs

在辨識器暫停以同步處理辨識和其他作業時發生。

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) 

事件類型

EventHandler<RecognizerUpdateReachedEventArgs>

範例

下列範例顯示載入和卸載 Grammar 物件的主控台應用程式。 應用程式會 RequestRecognizerUpdate 使用 方法來要求語音辨識引擎暫停，以便接收更新。 應用程式接著會載入或卸載 Grammar 物件。

在每個更新中，事件的處理常式 RecognizerUpdateReached 會將目前載入 Grammar 物件的名稱和狀態寫入主控台。 當載入和卸載文法時，應用程式會先辨識伺服器陣列動物的名稱、伺服器陣列動物的名稱和動物的名稱，然後只辨識植物的名稱。

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

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

      // Initialize a shared speech recognition engine.  
      recognizer = new SpeechRecognizer();  

      // 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.StateChanged +=   
        new EventHandler<StateChangedEventArgs>(recognizer_StateChanged);  

      // Load the Farm grammar.  
      recognizer.LoadGrammar(farmAnimals);  
      Console.WriteLine("Grammar Farm is loaded");  

      // 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(5000);  

      // Request an update and unload the Farm grammar.  
      recognizer.RequestRecognizerUpdate();  
      recognizer.UnloadGrammar(farmAnimals);  
      Thread.Sleep(5000);  

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

    // Put the shared speech recognizer into "listening" mode.  
    static void recognizer_StateChanged(object sender, StateChangedEventArgs e)  
    {  
      if (e.RecognizerState != RecognizerState.Stopped)  
      {  
        recognizer.EmulateRecognizeAsync("Start listening");  
      }  
    }  

    // 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("  Grammar {0} is loaded and is {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);  
    }  
  }  
}  

備註

應用程式必須先使用 RequestRecognizerUpdate 暫停執行中的 SpeechRecognizer 實例，才能修改其 Grammar 物件。 例如，暫停 時 SpeechRecognizer ，您可以載入、卸載、啟用和停用 Grammar 物件。 當它準備好接受修改時，會 SpeechRecognizer 引發這個事件。

當您建立 RecognizerUpdateReached 事件的委派時，您會識別將處理事件的方法。 若要使事件與您的事件處理常式產生關聯，請將委派的執行個體 (Instance) 加入至事件。 除非您移除委派，否則每當事件發生時就會呼叫事件處理常式。 如需事件處理常式委派的詳細資訊，請參閱 事件和委派。

另請參閱

• RequestRecognizerUpdate()
• RecognizerUpdateReachedEventArgs