SpeechRecognitionEngine.SpeechRecognized 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。
當收到 SpeechRecognitionEngine 與其載入且啟用 Grammar 的物件相符的輸入時，會被提高。
public:
event EventHandler<System::Speech::Recognition::SpeechRecognizedEventArgs ^> ^ SpeechRecognized;public event EventHandler<System.Speech.Recognition.SpeechRecognizedEventArgs>? SpeechRecognized;public event EventHandler<System.Speech.Recognition.SpeechRecognizedEventArgs> SpeechRecognized;member this.SpeechRecognized : EventHandler<System.Speech.Recognition.SpeechRecognizedEventArgs> Public Custom Event SpeechRecognized As EventHandler(Of SpeechRecognizedEventArgs) Public Event SpeechRecognized As EventHandler(Of SpeechRecognizedEventArgs) 事件類型
範例
以下範例是一個主控台應用程式的一部分，該應用程式用於建立語音辨識文法、建構物件 Grammar ，並將其載入 SpeechRecognitionEngine 以執行辨識。 範例展示了語音輸入到 、 SpeechRecognitionEngine相關的識別結果，以及語音識別器所引發的相關事件。
像「我想從芝加哥飛往邁阿密」這類語音輸入會觸發事件 SpeechRecognized 。 說出「從休士頓飛我到芝加哥」這句話不會觸發事件 SpeechRecognized 。
範例中使用了事件的處理器 SpeechRecognized ，顯示成功識別的片語及其在主控台中的語意。
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 SemanticResultValue objects that contain cities and airport codes.
SemanticResultValue chicago = new SemanticResultValue("Chicago", "ORD");
SemanticResultValue boston = new SemanticResultValue("Boston", "BOS");
SemanticResultValue miami = new SemanticResultValue("Miami", "MIA");
SemanticResultValue dallas = new SemanticResultValue("Dallas", "DFW");
// Create a Choices object and add the SemanticResultValue objects, using
// implicit conversion from SemanticResultValue to GrammarBuilder
Choices cities = new Choices();
cities.Add(new Choices(new GrammarBuilder[] { chicago, boston, miami, dallas }));
// Build the phrase and add SemanticResultKeys.
GrammarBuilder chooseCities = new GrammarBuilder();
chooseCities.Append("I want to fly from");
chooseCities.Append(new SemanticResultKey("origin", cities));
chooseCities.Append("to");
chooseCities.Append(new SemanticResultKey("destination", cities));
// Build a Grammar object from the GrammarBuilder.
Grammar bookFlight = new Grammar(chooseCities);
bookFlight.Name = "Book Flight";
// Add a handler for the LoadGrammarCompleted event.
recognizer.LoadGrammarCompleted +=
new EventHandler<LoadGrammarCompletedEventArgs>(recognizer_LoadGrammarCompleted);
// Add a handler for the SpeechRecognized event.
recognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
// Load the grammar object to the recognizer.
recognizer.LoadGrammarAsync(bookFlight);
// Set the input to the recognizer.
recognizer.SetInputToDefaultAudioDevice();
// Start recognition.
recognizer.RecognizeAsync();
// Keep the console window open.
Console.ReadLine();
}
}
// Handle the LoadGrammarCompleted event.
static void recognizer_LoadGrammarCompleted(object sender, LoadGrammarCompletedEventArgs e)
{
Console.WriteLine("Grammar loaded: " + e.Grammar.Name);
Console.WriteLine();
}
// Handle the SpeechRecognized event.
static void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
Console.WriteLine("Speech recognized: " + e.Result.Text);
Console.WriteLine();
Console.WriteLine("Semantic results:");
Console.WriteLine(" The flight origin is " + e.Result.Semantics["origin"].Value);
Console.WriteLine(" The flight destination is " + e.Result.Semantics["destination"].Value);
}
}
}
備註
你可以使用其中 Recognize 一種 or RecognizeAsync 方法來啟動辨識操作。 若識別器判斷輸入與其載入Grammar物件中某個物件有足夠信心，則會觸發該SpeechRecognized事件。 屬性Result包含SpeechRecognitionRejectedEventArgs被接受RecognitionResult的物件。 事件處理者 SpeechRecognized 可以獲得認可的詞組以及較低信心分數的識別 Alternates 清單。
如果你的應用程式使用實 SpeechRecognitionEngine 例，你可以用其中一種 UpdateRecognizerSetting 方法修改語音輸入被接受或拒絕的信心水準。 你可以用 BabbleTimeout、 InitialSilenceTimeout、 EndSilenceTimeout和 EndSilenceTimeoutAmbiguous 屬性來修改語音辨識對非語音輸入的反應。
當識別器收到與文法相符的輸入時， Grammar 物件可以引發事件 SpeechRecognized 。 Grammar物件的SpeechRecognized事件會先於語音識別器的SpeechRecognized事件被提出。 任何特定文法相關的任務，都應由事件處理 SpeechRecognized 者執行。
當你建立 SpeechRecognized 代理人時，你就能確定處理事件的方法。 要將事件與你的事件處理器關聯，請將該代理的實例加入事件中。 事件處理程序會在事件發生時被呼叫，除非你移除代理。
