private void ReverseTextBox_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
SpeechRecognitionResult recoResult = e.Result;
ReverseTextBox.Text = ReverseString(recoResult.Text);
e.Canceled = true;
}
/// <summary>
/// Method to instantiate recognizer with appropriate grammar and perform recognition.
/// </summary>
private async void HandleSpeech()
{
if (_handlingSpeech)
{
return;
}
_handlingSpeech = true;
try
{
SpeechRecognizerUI recognizer = new SpeechRecognizerUI();
SpeechRecognitionUIResult result = null;
if (this.InputScope != null && (this.InputScope.Names[0] as InputScopeName).NameValue.Equals(InputScopeNameValue.Search))
{
recognizer.Recognizer.Grammars.AddGrammarFromPredefinedType("WebSearchGrammar", SpeechPredefinedGrammar.WebSearch);
}
try
{
result = await recognizer.RecognizeWithUIAsync();
}
catch (OperationCanceledException)
{
return;
}
catch (Exception ex)
{
if ((uint)ex.HResult == 0x80045508)
{
// This can occur when speech recognition is interupted by navigation away from
// the app. We'll just swallow the exception to work around it.
return;
}
MessageBox.Show("An error occured. \n" + ex.Message);
return;
}
// The SpeechRecognizerUI component will handle cases where the speech was not recognized and prompt
// user to retry. This check is just to make sure that the speech recognition request was not
// canceled by the back button, navigation, etc.
if (result.ResultStatus == SpeechRecognitionUIStatus.Succeeded)
{
// Raise SpeechRecognized event
var handler = SpeechRecognized;
SpeechRecognizedEventArgs eventArgs = new SpeechRecognizedEventArgs(result.RecognitionResult);
if (handler != null)
{
handler(this, eventArgs);
if (eventArgs.Canceled)
{
return;
}
}
// Update display
string originalText = this.Text;
if (_useSelectedTextReplacement)
{
string newText = originalText.Substring(0, _selectionStart) + result.RecognitionResult.Text + originalText.Substring(_selectionEnd + 1);
this.Text = newText;
this.Select(_selectionStart, result.RecognitionResult.Text.Length);
}
else
{
this.Text = result.RecognitionResult.Text;
this.Focus();
this.Select(_selectionStart, result.RecognitionResult.Text.Length);
}
}
}
finally
{
_handlingSpeech = false;
}
}
