SpeechRecognitionEngine.RecognizeCompleted 事件

public:
 event EventHandler<System::Speech::Recognition::RecognizeCompletedEventArgs ^> ^ RecognizeCompleted;

public event EventHandler<System.Speech.Recognition.RecognizeCompletedEventArgs> RecognizeCompleted;

member this.RecognizeCompleted : EventHandler<System.Speech.Recognition.RecognizeCompletedEventArgs> 

Public Custom Event RecognizeCompleted As EventHandler(Of RecognizeCompletedEventArgs) 

Public Event RecognizeCompleted As EventHandler(Of RecognizeCompletedEventArgs) 

事件类型

示例

以下示例识别诸如“显示爵士乐类别中的艺术家列表”或“显示专辑福音”等短语。 该示例使用 事件的处理程序 RecognizeCompleted 在控制台中显示有关识别结果的信息。

using System;
using System.Speech.Recognition;

namespace SampleRecognition
{
  class Program
  {
    static void Main(string[] args)

    // Initialize an in-process speech recognition engine.
    {
      using (SpeechRecognitionEngine recognizer =
         new SpeechRecognitionEngine())
      {

        //  Create lists of alternative choices.
        Choices listTypes = new Choices(new string[] { "albums", "artists" });
        Choices genres = new Choices(new string[] {
          "blues", "classical", "gospel", "jazz", "rock" });

        //  Create a GrammarBuilder object and assemble the grammar components.
        GrammarBuilder mediaMenu = new GrammarBuilder("Display");
        mediaMenu.Append("the list of", 0, 1);
        mediaMenu.Append(listTypes);
        mediaMenu.Append("in the", 0, 1);
        mediaMenu.Append(genres);
        mediaMenu.Append("category.", 0, 1);

        //  Build a Grammar object from the GrammarBuilder.
        Grammar mediaMenuGrammar = new Grammar(mediaMenu);
        mediaMenuGrammar.Name = "Media Chooser";

        // Attach event handlers.
        recognizer.RecognizeCompleted +=
          new EventHandler<RecognizeCompletedEventArgs>(recognizer_RecognizeCompleted);
        recognizer.LoadGrammarCompleted +=
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);

        // Load the grammar object to the recognizer.
        recognizer.LoadGrammarAsync(mediaMenuGrammar);

        // Set the input to the recognizer.
        recognizer.SetInputToDefaultAudioDevice();

        // Start asynchronous, continuous recognition.
        recognizer.RecognizeAsync();

        // Keep the console window open.
        Console.ReadLine();
      }
    }

    // Handle the RecognizeCompleted event.
    static void recognizer_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)
    {
      if (e.Error != null)
      {
        Console.WriteLine(
          "RecognizeCompleted, error occurred during recognition: {0}", e.Error);
        return;
      }

      if (e.InitialSilenceTimeout || e.BabbleTimeout)
      {
        Console.WriteLine(
          "RecognizeCompleted: BabbleTimeout({0}), InitialSilenceTimeout({1}).",
          e.BabbleTimeout, e.InitialSilenceTimeout);
        return;
      }

      if (e.InputStreamEnded)
      {
        Console.WriteLine(
          "RecognizeCompleted: AudioPosition({0}), InputStreamEnded({1}).",
          e.AudioPosition, e.InputStreamEnded);
      }

      if (e.Result != null)
      {
        Console.WriteLine("RecognizeCompleted:");
        Console.WriteLine("  Grammar: " + e.Result.Grammar.Name);
        Console.WriteLine("  Recognized text: " + e.Result.Text);
        Console.WriteLine("  Confidence score: " + e.Result.Confidence);
        Console.WriteLine("  Audio position: " + e.AudioPosition);
      }

      else
      {
        Console.WriteLine("RecognizeCompleted: No result.");
      }

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

    // Handle the LoadGrammarCompleted event.
    static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
    {
      Console.WriteLine("Grammar loaded:  " + e.Grammar.Name);
    }
  }
}

注解

对象的 SpeechRecognitionEngineRecognizeAsync 方法启动异步识别操作。 当识别器完成异步操作时，它会引发此事件。

使用 事件的处理程序 RecognizeCompleted ，可以访问 RecognitionResult 对象中的 RecognizeCompletedEventArgs 。 如果识别不成功， RecognitionResult 将为 null。 若要确定音频输入超时或中断是否导致识别失败，可以访问 、 BabbleTimeout或 InputStreamEnded的属性InitialSilenceTimeout。

有关更多信息，请参见 RecognizeCompletedEventArgs 类。

若要获取有关最佳拒绝的识别候选项的详细信息，请附加 事件的处理程序 SpeechRecognitionRejected 。

创建 RecognizeCompleted 委托时，需要标识将处理该事件的方法。 若要将事件与事件处理程序关联，请将该委托的一个实例添加到事件中。 除非移除了该委托，否则每当发生该事件时就会调用事件处理程序。 有关事件处理程序委托的详细信息，请参阅 事件和委托。

另请参阅

• RecognizeCompletedEventArgs
• RecognizeAsync()
• SpeechRecognized