Advanced Live Tiles, Part 3: Lock Screens: Listing 4

The MainPage code-behind source code.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.ApplicationModel.Background;
using Windows.UI.Notifications;
using Windows.Data.Xml.Dom;

// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238

namespace VSMAdvancedTilesP3Demo
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        /// <summary>
        /// Invoked when this page is about to be displayed in a Frame.
        /// </summary>
        /// <param name="e">Event data that describes how this page was reached.  The Parameter
        /// property is typically used to configure the page.</param>
        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
             BackgroundAccessStatus status = await BackgroundExecutionManager.RequestAccessAsync();
             Status.Text = GetBadgeAcessMessage(status);
        }

        private string GetBadgeAcessMessage(BackgroundAccessStatus status)
        {
            string message = string.Empty;

            switch (status)
            {
                case BackgroundAccessStatus.AllowedMayUseActiveRealTimeConnectivity:
                    message = "May use active real-time connectivity.";
                    break;
                case BackgroundAccessStatus.AllowedWithAlwaysOnRealTimeConnectivity:
                    message = "Always on real-time connectivity.";
                    break;
                case BackgroundAccessStatus.Denied:
                    message = "User denied lock screen badge access.";
                    break;
                case BackgroundAccessStatus.Unspecified:
                default:
                    message = "Unknown lock screen badge access status.";
                    break;
            }

            return message;
        }

        private void SendBadge_Click(object sender, RoutedEventArgs e)
        {
            string badge = String.Format("<badge value=\"{0}\"/>", Message.Text);
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(badge);
            BadgeNotification badgeNotification = new BadgeNotification(xmlDoc);
            BadgeUpdateManager.CreateBadgeUpdaterForApplication().Update(badgeNotification);
            Status.Text = "Lock Screen Badge was sent.";
        }

        private void SendTile_Click(object sender, RoutedEventArgs e)
        {
            string tile = (String.Format("<tile><visual><binding template=\"TileWideText01\">" +
                      "<text id=\"1\">{0}</text>" +
                      "<text id=\"2\"> </text>" +
                    "</binding>" +
                    "<binding template=\"TileSquareText03\">" +
                      "<text id=\"1\">{0}</text>" +
                      "<text id=\"2\"> </text>" +
                    "</binding>" +
                  "</visual>" +
                "</tile>", Message.Text));
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(tile);
            TileNotification tileNotification = new TileNotification(xmlDoc);
            TileUpdateManager.CreateTileUpdaterForApplication().Update(tileNotification);
            Status.Text = "Lock Screen Tile was sent.";
        }
    }
}

About the Author

Eric Vogel is a Sr. Software Developer at Kunz, Leigh, & Associates in Okemos, MI. He is the president of the Greater Lansing User Group for .NET. Eric enjoys learning about software architecture and craftsmanship, and is always looking for ways to create more robust and testable applications. Contact him at vogelvision@gmail.com.