SpeechRecognizer.SpeechRecognitionRejected 事件

public:
 event EventHandler<System::Speech::Recognition::SpeechRecognitionRejectedEventArgs ^> ^ SpeechRecognitionRejected;

public event EventHandler<System.Speech.Recognition.SpeechRecognitionRejectedEventArgs> SpeechRecognitionRejected;

member this.SpeechRecognitionRejected : EventHandler<System.Speech.Recognition.SpeechRecognitionRejectedEventArgs> 

Public Custom Event SpeechRecognitionRejected As EventHandler(Of SpeechRecognitionRejectedEventArgs) 

Public Event SpeechRecognitionRejected As EventHandler(Of SpeechRecognitionRejectedEventArgs) 

事件类型

示例

以下示例识别“显示爵士乐类别中的艺术家列表”或“显示专辑福音”等短语。 当语音输入无法与语法的内容匹配时，该示例使用 事件的处理程序 SpeechRecognitionRejected 在控制台中显示通知，并具有足够的置信度以生成成功的识别。

using System;
using System.Speech.Recognition;

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

    // Initialize a shared speech recognition engine.
    {
      using (SpeechRecognizer recognizer =
         new SpeechRecognizer())
      {

        // Create a grammar.
        //  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.LoadGrammarCompleted +=
          new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);
        recognizer.SpeechRecognized +=
          new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
        recognizer.SpeechRecognitionRejected +=
          new EventHandler<SpeechRecognitionRejectedEventArgs>(recognizer_SpeechRecognitionRejected);

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

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

    // Handle the SpeechRecognitionRejected event.
    static void recognizer_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)
    {
      Console.WriteLine("Speech input was rejected.");
    }

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

    // Handle the SpeechRecognized event.
    static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
    {
      Console.WriteLine("Speech recognized: " + e.Result.Text);
    }
  }
}

注解

如果共享识别器确定输入与任何加载的语音识别语法都不匹配，则会引发此事件。 Result的 SpeechRecognitionRejectedEventArgs 属性包含拒绝RecognitionResult的对象。

共享识别器（由 SpeechRecognizer管理）的置信度阈值与用户配置文件相关联，并存储在 Windows 注册表中。 应用程序不应将更改写入共享识别器属性的注册表。

为 SpeechRecognitionRejected 事件创建委托时，可以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

• SpeechRecognitionRejectedEventArgs
• SpeechDetected
• SpeechHypothesized
• SpeechRecognized