LoadGrammarCompletedEventArgs 类

定义

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

public class LoadGrammarCompletedEventArgs : System.ComponentModel.AsyncCompletedEventArgs

type LoadGrammarCompletedEventArgs = class
    inherit AsyncCompletedEventArgs

Public Class LoadGrammarCompletedEventArgs
Inherits AsyncCompletedEventArgs

继承

Object

EventArgs

AsyncCompletedEventArgs

LoadGrammarCompletedEventArgs

示例

以下示例创建一个共享语音识别器，然后创建两种类型的语法来识别特定单词和接受自由听写。 该示例以异步方式将所有创建的语法加载到识别器。 识别器和LoadGrammarCompletedSpeechRecognized事件的处理程序报告识别结果以及用于执行识别的语法。

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");  
      }  
    }  
  }  
}  

注解

当 对象引发其 SpeechRecognitionEngine.LoadGrammarCompleted 事件或 对象引发其 事件时SpeechRecognitionEngine，SpeechRecognizer将创建 的LoadGrammarCompleted实例LoadGrammarCompletedEventArgs。 对方法的调用完成时， LoadGrammarAsync 将引发事件。

若要获取有关 Grammar 已加载的对象的信息，请在 事件的处理程序中访问 Grammar 属性。

如果识别器在操作期间遇到异常，则 Error 属性设置为异常， Loaded 并且关联的 Grammar 的 属性可以是 false。

另请参阅

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