SpeechRecognizer 构造函数

定义

命名空间:

System.Speech.Recognition

程序集:

System.Speech.dll

初始化 SpeechRecognizer 类的新实例。

public:
 SpeechRecognizer();

public SpeechRecognizer ();

Public Sub New ()

示例

下面的示例是一个控制台应用程序的一部分，该应用程序加载语音识别语法并演示异步仿真输入、关联的识别结果和语音识别器引发的相关事件。 如果 Windows 语音识别未运行，则启动此应用程序也将启动 Windows 语音识别。 如果 Windows 语音识别处于 睡眠 状态，则 EmulateRecognizeAsync 始终返回 null。

using System;  
using System.Speech.Recognition;  
using System.Threading;  

namespace SharedRecognizer  
{  
  class Program  
  {  

    // Indicate whether the asynchronous emulate recognition  
    // operation has completed.  
    static bool completed;  

    static void Main(string[] args)  
    {  

      // Initialize an instance of the shared recognizer.  
      using (SpeechRecognizer recognizer = new SpeechRecognizer())  
      {  

        // Create and load a sample grammar.  
        Grammar testGrammar =  
          new Grammar(new GrammarBuilder("testing testing"));  
        testGrammar.Name = "Test Grammar";  
        recognizer.LoadGrammar(testGrammar);  

        // Attach event handlers for recognition events.  
        recognizer.SpeechRecognized +=  
          new EventHandler<SpeechRecognizedEventArgs>(  
            SpeechRecognizedHandler);  
        recognizer.EmulateRecognizeCompleted +=  
          new EventHandler<EmulateRecognizeCompletedEventArgs>(  
            EmulateRecognizeCompletedHandler);  

        completed = false;  

        // Start asynchronous emulated recognition.   
        // This matches the grammar and generates a SpeechRecognized event.  
        recognizer.EmulateRecognizeAsync("testing testing");  

        // Wait for the asynchronous operation to complete.  
        while (!completed)  
        {  
          Thread.Sleep(333);  
        }  

        completed = false;  

        // Start asynchronous emulated recognition.  
        // This does not match the grammar or generate a SpeechRecognized event.  
        recognizer.EmulateRecognizeAsync("testing one two three");  

        // Wait for the asynchronous operation to complete.  
        while (!completed)  
        {  
          Thread.Sleep(333);  
        }  
      }  

      Console.WriteLine();  
      Console.WriteLine("Press any key to exit...");  
      Console.ReadKey();  
    }  

    // Handle the SpeechRecognized event.  
    static void SpeechRecognizedHandler(  
      object sender, SpeechRecognizedEventArgs e)  
    {  
      if (e.Result != null)  
      {  
        Console.WriteLine("Recognition result = {0}",  
          e.Result.Text ?? "<no text>");  
      }  
      else  
      {  
        Console.WriteLine("No recognition result");  
      }  
    }  

    // Handle the SpeechRecognizeCompleted event.  
    static void EmulateRecognizeCompletedHandler(  
      object sender, EmulateRecognizeCompletedEventArgs e)  
    {  
      if (e.Result == null)  
      {  
        Console.WriteLine("No result generated.");  
      }  

      // Indicate the asynchronous operation is complete.  
      completed = true;  
    }  
  }  
}  

注解

每个 SpeechRecognizer 对象维护一组单独的语音识别语法。

另请参阅

• SpeechRecognitionEngine
• Grammar