Windows Store và Json: Splash Screens màn hình chờ trên Windows Store C#

MainPage.xaml

Windows Store 2017

<Page
    x:Class="Theory2.ExtendedSplash"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Theory2"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="#464646">
        <Canvas>
            <Image x:Name="extendedSplashImage" Source="Assets/SplashScreen.png"/>
            <ProgressRing Name="splashProgressRing" IsActive="True" Width="40" Height="40"
                          HorizontalAlignment="Center"/>
        </Canvas>
        <StackPanel HorizontalAlignment="Center" VerticalAlignment="Bottom">
            <Button x:Name="DismissSplash" Content="Dismiss extended splash screen" HorizontalAlignment="Center" Click="DismissSplash_Click" />
        </StackPanel>
    </Grid>

</Page>

MainPage.xaml.cs

Windows Store 2017

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
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.Activation;
using Windows.UI.Core;
using Theory2.Common;

namespace Theory2
{

    public sealed partial class ExtendedSplash : Page
    {
        internal Rect splashImageRect; // Rect to store splash screen image coordinates.
        private SplashScreen splash; // Variable to hold the splash screen object.
        internal bool dismissed = false; // Variable to track splash screen dismissal status.
        internal Frame rootFrame;

        public ExtendedSplash(SplashScreen splashscreen, bool loadState)
        {
            this.InitializeComponent();

            Window.Current.SizeChanged += new WindowSizeChangedEventHandler(Current_SizeChanged);
            this.splash = splashscreen;

            if (splash != null)
            {
                splash.Dismissed += Splash_Dismissed;

                splashImageRect = splash.ImageLocation;
                PositionImage();
                PositionRing();
                
            }

            rootFrame = new Frame();
            RestoreStateAsync(loadState);
        }

        private async void RestoreStateAsync(bool loadState)
        {
            if (loadState)
            {
                await SuspensionManager.RestoreAsync();
            }
               

        }

        private void PositionRing()
        {
            splashProgressRing.SetValue(Canvas.LeftProperty, splashImageRect.X + (splashImageRect.Width * 0.5) - (splashProgressRing.Width * 0.5));
            splashProgressRing.SetValue(Canvas.TopProperty, (splashImageRect.Y + splashImageRect.Height + splashImageRect.Height * 0.1));

        }

        private void PositionImage()
        {
            extendedSplashImage.SetValue(Canvas.LeftProperty, splashImageRect.X);
            extendedSplashImage.SetValue(Canvas.TopProperty, splashImageRect.Y);
            extendedSplashImage.Height = splashImageRect.Height;
            extendedSplashImage.Width = splashImageRect.Width;

        }

        private void Splash_Dismissed(SplashScreen sender, object args)
        {
            dismissed = true;
        }

        private void Current_SizeChanged(object sender, WindowSizeChangedEventArgs e)
        {
            if (splash != null)
            {
                // Update the coordinates of the splash screen image.
                splashImageRect = splash.ImageLocation;
                PositionImage();

                // If applicable, include a method for positioning a progress control.
                 PositionRing();
            }

        }

        private void DismissSplash_Click(object sender, RoutedEventArgs e)
        {
            DismissExtendedSplash();
        }

        private void DismissExtendedSplash()
        {
            //Chuyển đến màn hình khác
            rootFrame.Navigate(typeof(MainPage));
            Window.Current.Content = rootFrame;

        }
    }
}