SpeechRecognitionEngine.SpeechDetected 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。
當 SpeechRecognitionEngine 偵測到可辨識為語音的輸入時引發。
public:
event EventHandler<System::Speech::Recognition::SpeechDetectedEventArgs ^> ^ SpeechDetected;public event EventHandler<System.Speech.Recognition.SpeechDetectedEventArgs> SpeechDetected;member this.SpeechDetected : EventHandler<System.Speech.Recognition.SpeechDetectedEventArgs> Public Custom Event SpeechDetected As EventHandler(Of SpeechDetectedEventArgs) Public Event SpeechDetected As EventHandler(Of SpeechDetectedEventArgs) 事件類型
範例
下列範例是主控台應用程式的一部分，用於選擇航班的來源和目的地城市。 應用程式可辨識「我想要從邁阿密飛出到芝加哥」等片語。此範例會 SpeechDetected 使用 事件來報告 AudioPosition 每次偵測到語音時。
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 a grammar.
Choices cities = new Choices(new string[] {
"Los Angeles", "New York", "Chicago", "San Francisco", "Miami", "Dallas" });
GrammarBuilder gb = new GrammarBuilder();
gb.Append("I would like to fly from");
gb.Append(cities);
gb.Append("to");
gb.Append(cities);
// Create a Grammar object and load it to the recognizer.
Grammar g = new Grammar(gb);
g.Name = ("City Chooser");
recognizer.LoadGrammarAsync(g);
// Attach event handlers.
recognizer.LoadGrammarCompleted +=
new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);
recognizer.SpeechDetected +=
new EventHandler<SpeechDetectedEventArgs>(recognizer_SpeechDetected);
recognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
// Set the input to the recognizer.
recognizer.SetInputToDefaultAudioDevice();
// Start recognition.
recognizer.RecognizeAsync();
// Keep the console window open.
Console.ReadLine();
}
}
// Handle the SpeechDetected event.
static void recognizer_SpeechDetected(object sender, SpeechDetectedEventArgs e)
{
Console.WriteLine(" Speech detected at AudioPosition = {0}", e.AudioPosition);
}
// 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);
}
}
}
備註
每個語音辨識器都有一個演算法可區分無聲和語音。 SpeechRecognitionEngine當 執行語音辨識作業時，它會在演算法將輸入識別為語音時引發 SpeechDetected 事件。 AudioPosition相關聯 SpeechDetectedEventArgs 物件的 屬性工作表示輸入資料流程中辨識器偵測到語音的位置。 SpeechDetected會在 SpeechRecognitionEngine 引發任何 SpeechHypothesized 、 SpeechRecognized 或 SpeechRecognitionRejected 事件之前引發 事件。
如需詳細資訊， Recognize 請參閱 、 RecognizeAsyncEmulateRecognize 和 EmulateRecognizeAsync 方法。
建立 SpeechDetected 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。
