SpeechRecognitionEngine.SpeechRecognitionRejected 事件
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
当 SpeechRecognitionEngine 采用不与其加载启用的 Grammar 对象匹配的输入的时候引发。
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。 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，并足以 Confidence 生成成功的识别。 处理程序还显示由于置信度分数低而被拒绝的识别结果 Alternates 。
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(new System.Globalization.CultureInfo("en-US")))
{
// 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);
// Set the input to the recognizer.
recognizer.SetInputToDefaultAudioDevice();
// Start recognition.
recognizer.RecognizeAsync(RecognizeMode.Multiple);
// 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.");
foreach (RecognizedPhrase phrase in e.Result.Alternates)
{
Console.WriteLine(" Rejected phrase: " + phrase.Text);
Console.WriteLine(" Confidence score: " + phrase.Confidence);
}
}
// 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);
Console.WriteLine(" Confidence score: " + e.Result.Confidence);
}
}
}
注解
如果识别器确定输入与其加载和启用 Grammar 的任何对象都不匹配，则它将引发此事件。 Result的 SpeechRecognitionRejectedEventArgs 属性包含拒绝RecognitionResult的对象。 可以使用 事件的处理程序 SpeechRecognitionRejected 来检索已拒绝的识别 Alternates 及其 Confidence 分数。
如果应用程序使用 SpeechRecognitionEngine 实例，则可以使用方法之一 UpdateRecognizerSetting 修改接受或拒绝语音输入的置信度。 可以使用 、InitialSilenceTimeout、 EndSilenceTimeout和 EndSilenceTimeoutAmbiguous 属性修改语音识别响应非语音输入BabbleTimeout的方式。
创建 SpeechRecognitionRejected 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。
