C# WPF Speech recognition not working.

Question

The event does not fire up i.e.  no message box is shown up on speaking the words. Not sure about whether  even the engine started or not.

 

 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Speech;

using System.Speech.Recognition;

using System.Speech.Synthesis;

using System.Threading;

namespace Summerproject_trial

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

private SpeechRecognitionEngine recEngine = new SpeechRecognitionEngine();

public MainWindow()

{

InitializeComponent();

Choices mychoices = new Choices();

mychoices.Add(new string[] {"Ok","Test","Hello"});

GrammarBuilder gb = new GrammarBuilder();

gb.Append(mychoices);

Grammar mygrammar = new Grammar(gb);

recEngine.LoadGrammarAsync(mygrammar);

recEngine.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(recEngine_SpeechRecognized);

recEngine.SetInputToDefaultAudioDevice();

}

void recEngine_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)

{

MessageBox.Show("You said: "+e.Result.Text);

//throw new NotImplementedException();

}

}

}