SpeechRecognitionEngine.SpeechRecognitionRejected 事件
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
在 SpeechRecognitionEngine 收到的輸入不符合任何其已載入且已啟用 Grammar 物件時引發。
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) 事件類型
範例
下列範例會辨識「在音樂類別中顯示藝術師清單」或「顯示相簿」等片語。 此範例使用 SpeechRecognitionRejected 事件的處理常式，在語音輸入無法比對至文法 Confidence 的內容時，在主控台中顯示通知，足以產生成功的辨識。 處理常式也會顯示因為低信賴分數而遭到拒絕的辨識結果 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);
}
}
}
備註
如果辨識器判斷輸入不符合任何載入和啟用 Grammar 物件的信賴度，就會引發這個事件。 的 ResultSpeechRecognitionRejectedEventArgs 屬性包含拒絕 RecognitionResult 的物件。 您可以使用 事件的處理常式 SpeechRecognitionRejected 來擷取已拒絕的 Confidence 辨識 Alternates 及其分數。
如果您的應用程式使用 SpeechRecognitionEngine 實例，您可以使用其中 UpdateRecognizerSetting 一種方法來修改接受或拒絕語音輸入的信賴等級。 您可以使用 、 InitialSilenceTimeout 、 EndSilenceTimeout 和 EndSilenceTimeoutAmbiguous 屬性來修改語音辨識回應非語音輸入 BabbleTimeout 的方式。
建立 SpeechRecognitionRejected 委派時，必須識別處理事件的方法。 若要使事件與您的事件處理常式產生關聯，請將委派的執行個體 (Instance) 加入至事件。 除非您移除委派，否則每當事件發生時就會呼叫事件處理常式。 如需事件處理常式委派的詳細資訊，請參閱 事件和委派。
