StateChangedEventArgs 類別

定義

命名空間:

System.Speech.Recognition

組件:

System.Speech.dll

套件:

System.Speech v9.0.0-preview.3.24172.9

來源:

RecognizerStateChangedEventArgs.cs

從 StateChanged 事件傳回資料。

public ref class StateChangedEventArgs : EventArgs

public class StateChangedEventArgs : EventArgs

type StateChangedEventArgs = class
    inherit EventArgs

Public Class StateChangedEventArgs
Inherits EventArgs

繼承

Object

EventArgs

StateChangedEventArgs

範例

下列範例會建立共用語音辨識器，然後建立兩種類型的文法來辨識特定單字，以及接受自由聽寫。 此範例會以非同步方式將所有建立的文法載入至辨識器。 事件的處理常式 StateChanged 會 EmulateRecognizeAsync 使用 方法將 Windows 辨識放在「接聽」模式中。

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 "yesno" grammar.  
      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 "done" grammar.  
      Grammar doneGrammar =  
        new Grammar(new Choices(new string[] { "done", "exit", "quit", "stop" }));  
      doneGrammar.Name = "Done";  

      // Create 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();  
    }  

    // 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");  
      }  
    }  

    // Write the grammar name and the text of the recognized phrase to the console.  
    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");  
    }  
  }  
}  

備註

事件 StateChanged 是由 SpeechRecognizer 類別引發。 StateChangedEventArgs 衍生自 EventArgs ，並傳遞至事件的處理常式 StateChanged 。

State 是唯讀屬性。 共用語音辨識器的狀態無法以程式設計方式變更。 使用者可以使用語音辨識使用者介面 (UI) 或透過 Windows主控台的語音辨識成員，來變更共用語音辨識器的狀態。

語音辨識 UI 中的 [開啟 ] 和 [ 睡眠] 設定都會對應至 Listening 狀態。 語音辨識 UI 中的 [關閉 ] 設定會對應至 Stopped 。

屬性

RecognizerState

取得在 Windows 中的共用語音辨識引擎的目前狀態。

方法

Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)

另請參閱

• StateChanged
• RecognizerState