/// <summary>
/// This event gets fired anytime the text in the TextBox gets updated.
/// It is recommended to check the reason for the text changing by checking against args.Reason
/// </summary>
/// <param name="sender">The AutoSuggestBox whose text got changed.</param>
/// <param name="args">The event arguments.</param>
private void asb_TextChanged(AutoSuggestBox sender, AutoSuggestBoxTextChangedEventArgs args)
{
//We only want to get results when it was a user typing,
//otherwise we assume the value got filled in by TextMemberPath
//or the handler for SuggestionChosen
if (args.Reason == AutoSuggestionBoxTextChangeReason.UserInput)
{
var matchingContacts = ContactSampleDataSource.GetMatchingContacts(sender.Text);
sender.ItemsSource = matchingContacts.ToList();
}
}
/// <summary>
/// This event gets fired when:
/// * a user presses Enter while focus is in the TextBox
/// * a user clicks or tabs to and invokes the query button (defined using the QueryIcon API)
/// * a user presses selects (clicks/taps/presses Enter) a suggestion
/// </summary>
/// <param name="sender">The AutoSuggestBox that fired the event.</param>
/// <param name="args">The args contain the QueryText, which is the text in the TextBox,
/// and also ChosenSuggestion, which is only non-null when a user selects an item in the list.</param>
private void asb_QuerySubmitted(AutoSuggestBox sender, AutoSuggestBoxQuerySubmittedEventArgs args)
{
if (args.ChosenSuggestion != null)
{
//User selected an item, take an action on it here
SelectContact(args.ChosenSuggestion as Contact);
}
else
{
//Do a fuzzy search on the query text
var matchingContacts = ContactSampleDataSource.GetMatchingContacts(args.QueryText);
if (matchingContacts.Count() >= 1)
{
//Choose the first match
SelectContact(matchingContacts.FirstOrDefault());
}
else
{
NoResults.Visibility = Visibility.Visible;
}
}
}