LoadGrammarCompletedEventArgs Classe

Definizione

public ref class LoadGrammarCompletedEventArgs : System::ComponentModel::AsyncCompletedEventArgs

public class LoadGrammarCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs

type LoadGrammarCompletedEventArgs = class
    inherit AsyncCompletedEventArgs

Public Class LoadGrammarCompletedEventArgs
Inherits AsyncCompletedEventArgs

Ereditarietà

Object

EventArgs

AsyncCompletedEventArgs

LoadGrammarCompletedEventArgs

Esempio

L'esempio seguente crea un riconoscimento vocale condiviso e quindi crea due tipi di grammatica per riconoscere parole specifiche e per accettare una dettatura gratuita. L'esempio carica in modo asincrono tutte le grammatica create nel riconoscimento. I gestori per gli eventi e SpeechRecognized del riconoscimento LoadGrammarCompleted segnalano i risultati del riconoscimento e la grammatica usata per eseguire il riconoscimento.

using System;  
using System.Speech.Recognition;  

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

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

        // Add a handler for the LoadGrammarCompleted event.  
        recognizer.LoadGrammarCompleted +=  
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);  

        // Add a handler for the SpeechRecognized event.  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);  

        // Add a handler for the StateChanged event.  
        recognizer.StateChanged +=  
          new EventHandler<StateChangedEventArgs>(recognizer_StateChanged);  

        // Create the "yesno" grammar and build it into a Grammar object.  
        Choices yesChoices = new Choices(new string[] { "yes", "yup", "yah}" });  
        SemanticResultValue yesValue =  
            new SemanticResultValue(yesChoices, (bool)true);  
        Choices noChoices = new Choices(new string[] { "no", "nope", "nah" });  
        SemanticResultValue noValue =  
            new SemanticResultValue(noChoices, (bool)false);  
        SemanticResultKey yesNoKey =  
            new SemanticResultKey("yesno", new Choices(new GrammarBuilder[] { yesValue, noValue }));  
        Grammar yesnoGrammar = new Grammar(yesNoKey);  
        yesnoGrammar.Name = "yesNo";  

        // Create the "done" grammar within the constructor of a Grammar object.  
        Grammar doneGrammar =  
        new Grammar(new GrammarBuilder(new Choices(new string[] { "done", "exit", "quit", "stop" })));  
        doneGrammar.Name = "Done";  

        // Create a dictation grammar.  
        Grammar dictation = new DictationGrammar();  
        dictation.Name = "Dictation";  

        // Load grammars to the recognizer.  
        recognizer.LoadGrammarAsync(yesnoGrammar);  
        recognizer.LoadGrammarAsync(doneGrammar);  
        recognizer.LoadGrammarAsync(dictation);  

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

    // Handle the SpeechRecognized event.  
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)  
    {  
      Console.WriteLine("Grammar({0}): {1}", e.Result.Grammar.Name, e.Result.Text);  

      // Add event handler code here.  
    }  

    // Handle the LoadGrammarCompleted event.   
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)  
    {  
      string grammarName = e.Grammar.Name;  
      bool grammarLoaded = e.Grammar.Loaded;  

      if (e.Error != null)  
      {  

        Console.WriteLine("LoadGrammar for {0} failed with a {1}.",  
        grammarName, e.Error.GetType().Name);  

        // Add exception handling code here.  
      }  

      Console.WriteLine("Grammar {0} {1} loaded.",  
      grammarName, (grammarLoaded) ? "is" : "is not");  
    }  

    // 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");  
      }  
    }  
  }  
}  

Commenti

Un'istanza di LoadGrammarCompletedEventArgs viene creata quando l'oggetto SpeechRecognitionEngine genera SpeechRecognitionEngine.LoadGrammarCompleted o genera il SpeechRecognizer relativo LoadGrammarCompleted evento. Gli eventi vengono generati quando vengono completate le chiamate ai LoadGrammarAsync metodi.

Per ottenere informazioni sull'oggetto Grammar caricato, accedere alla Grammar proprietà nel gestore per l'evento.

Se il riconoscimento rileva un'eccezione durante l'operazione, la Error proprietà è impostata sull'eccezione e la Loaded proprietà dell'oggetto associato Grammar può essere false.

Proprietà

Metodi

Si applica a

Vedi anche

• LoadGrammar(Grammar)
• LoadGrammarAsync(Grammar)
• LoadGrammar(Grammar)
• LoadGrammarAsync(Grammar)