SpeechRecognizer.EmulateRecognizeCompleted Event
Definition
Important
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Occurs when the shared recognizer finalizes an asynchronous recognition operation for emulated input.
public:
event EventHandler<System::Speech::Recognition::EmulateRecognizeCompletedEventArgs ^> ^ EmulateRecognizeCompleted;public event EventHandler<System.Speech.Recognition.EmulateRecognizeCompletedEventArgs> EmulateRecognizeCompleted;member this.EmulateRecognizeCompleted : EventHandler<System.Speech.Recognition.EmulateRecognizeCompletedEventArgs> Public Custom Event EmulateRecognizeCompleted As EventHandler(Of EmulateRecognizeCompletedEventArgs) Public Event EmulateRecognizeCompleted As EventHandler(Of EmulateRecognizeCompletedEventArgs) Event Type
Examples
The following example is part of a console application that loads a speech recognition grammar and demonstrates asynchronous emulated input, the associated recognition results, and the associated events raised by the speech recognizer. If Windows Speech Recognition is not running, then starting this application will also start Windows Speech Recognition. If Windows Speech Recognition is in the Sleeping mode, then EmulateRecognizeAsync always returns null.
using System;
using System.Speech.Recognition;
using System.Threading;
namespace SharedRecognizer
{
class Program
{
// Indicate whether the asynchronous emulate recognition
// operation has completed.
static bool completed;
static void Main(string[] args)
{
// Initialize an instance of the shared recognizer.
using (SpeechRecognizer recognizer = new SpeechRecognizer())
{
// Create and load a sample grammar.
Grammar testGrammar =
new Grammar(new GrammarBuilder("testing testing"));
testGrammar.Name = "Test Grammar";
recognizer.LoadGrammar(testGrammar);
// Attach event handlers for recognition events.
recognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(SpeechRecognizedHandler);
recognizer.EmulateRecognizeCompleted +=
new EventHandler<EmulateRecognizeCompletedEventArgs>(
EmulateRecognizeCompletedHandler);
completed = false;
// This EmulateRecognizeAsync call generates a SpeechRecognized event.
recognizer.EmulateRecognizeAsync("testing testing");
// Wait for the asynchronous operation to complete.
while (!completed)
{
Thread.Sleep(333);
}
completed = false;
// This EmulateRecognizeAsync call does not match the grammar
// or generate a SpeechRecognized event.
recognizer.EmulateRecognizeAsync("testing one two three");
// Wait for the asynchronous operation to complete.
while (!completed)
{
Thread.Sleep(333);
}
}
Console.WriteLine();
Console.WriteLine("Press any key to exit...");
Console.ReadKey();
}
// Handle the SpeechRecognized event.
static void SpeechRecognizedHandler(
object sender, SpeechRecognizedEventArgs e)
{
if (e.Result != null)
{
Console.WriteLine("Recognition result = {0}",
e.Result.Text ?? "<no text>");
}
else
{
Console.WriteLine("No recognition result");
}
}
// Handle the EmulateRecognizeCompleted event.
static void EmulateRecognizeCompletedHandler(
object sender, EmulateRecognizeCompletedEventArgs e)
{
if (e.Result == null)
{
Console.WriteLine("No result generated.");
}
// Indicate the asynchronous operation is complete.
completed = true;
}
}
}
Remarks
Each EmulateRecognizeAsync method begins an asynchronous recognition operation. The recognizer raises the EmulateRecognizeCompleted event when it finalizes the asynchronous operation.
The asynchronous recognition operation can raise the SpeechDetected, SpeechHypothesized, SpeechRecognitionRejected, and SpeechRecognized events. The EmulateRecognizeCompleted event is the last such event that the recognizer raises for a given operation.
When you create a delegate for an EmulateRecognizeCompleted event, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event-handler delegates, see Events and Delegates.
