通过

LoadGrammarCompletedEventArgs 类

  • 参考

定义

命名空间:
System.Speech.Recognition
程序集:
System.Speech.dll
包:
System.Speech v8.0.0
包:
System.Speech v9.0.0-rc.2.24473.5
Source:
LoadGrammarCompletedEventArgs.cs
Source:
LoadGrammarCompletedEventArgs.cs
Source:
LoadGrammarCompletedEventArgs.cs

为 SpeechRecognizer 或 SpeechRecognitionEngine 对象的 LoadGrammarCompleted 事件提供数据。

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。

属性

Cancelled

获取一个值，该值指示异步操作是否已被取消。

(继承自 AsyncCompletedEventArgs)
Error

获取一个值，该值指示异步操作期间发生的错误。

(继承自 AsyncCompletedEventArgs)
Grammar

完成加载的 Grammar 对象。
UserState

获取异步任务的唯一标识符。

(继承自 AsyncCompletedEventArgs)

方法

Equals(Object)

确定指定对象是否等于当前对象。

(继承自 Object)
GetHashCode()

作为默认哈希函数。

(继承自 Object)
GetType()

获取当前实例的 Type。

(继承自 Object)
MemberwiseClone()

创建当前 Object 的浅表副本。

(继承自 Object)
RaiseExceptionIfNecessary()

如果异步操作失败，则引发用户提供的异常。

(继承自 AsyncCompletedEventArgs)
ToString()

返回表示当前对象的字符串。

(继承自 Object)

适用于

另请参阅