Dec 23

Written by:
12/23/2010 1:27 PM 

This blog post wont tell you how to save data when the keyboard is visible, but it will tell you how to avoid the problem.

If a user is entering something in a TextBox, and the keyboard is visible, If they click a Save button, it will not save what they are currently typing because the values they are typing have not been bound to the TextBox yet.

One way around this, is to disable the Save button whenever they are entering something in a TextBox.

First, give the control a name so you can access it programmatically.

Wire-up some event handlers for GotFocus and LostFocus:

 

        public ExpenseDetailsPage()

        {

            InitializeComponent();

            ApplicationBar = new ApplicationBar();

            ApplicationBar.IsVisible = true;

            ApplicationBar.IsMenuEnabled = true;

 
            ApplicationBarIconButton btnSaveTrip = new ApplicationBarIconButton(new Uri("/icons/appbar.save.rest.png", UriKind.Relative));

            btnSaveTrip.Text = "Save Trip";

            btnSaveTrip.Click += new EventHandler(btnSaveTrip_Click);

            ApplicationBar.Buttons.Add(btnSaveTrip);

 
            txtTripDetails.GotFocus += new RoutedEventHandler(TripEditing_GotFocus);

            txtTripDetails.LostFocus += new RoutedEventHandler(TripEditing_LostFocus);

        }

 

Then implement the methods to enable and disable the Save button:

 

        void TripEditing_LostFocus(object sender, RoutedEventArgs e)

        {

            var SaveButton =

                ApplicationBar.Buttons.Cast<iapplicationbariconbutton>().Where(X => X.Text == "Save Trip").FirstOrDefault();

 
            if (SaveButton != null)

            {

                SaveButton.IsEnabled = true;

            }

        }

 
        void TripEditing_GotFocus(object sender, RoutedEventArgs e)

        {

            var SaveButton = 

                ApplicationBar.Buttons.Cast<iapplicationbariconbutton>().Where(X => X.Text == "Save Trip").FirstOrDefault();

 
            if (SaveButton != null)

            {

                SaveButton.IsEnabled = false;

            }

        }