SpeechRecognizer 构造函数

public:
 SpeechRecognizer();

public SpeechRecognizer();

Public Sub New ()

示例

以下示例是加载语音识别语法并演示异步模拟输入、关联识别结果以及语音识别器引发的相关事件的控制台应用程序的一部分。 如果 Windows 语音识别未运行，则启动此应用程序也会启动 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