UWP: Prüfen und Abfragen von Addon-Käufen in einer Microsoft Store App

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;

//< Namespaces >

using Windows.Services.Store;  //Store Add-ons Packages to buy

using System.Threading.Tasks;

//</ Namespaces >

namespace Check_InApp_Produkct_Status

{

    public sealed partial class MainPage : Page

    {

        public MainPage()

        {

            this.InitializeComponent();

        }

        #region Buttons

        //------------------< region: Buttons >------------------

        private void btnGet_Addins_Click(object sender, RoutedEventArgs e)

        {

            get_Store_LicenseInfo();

        }

        private void btnCheck_First_Addon_Click(object sender, RoutedEventArgs e)

        {

            check_First_AddOn_Package();

        }

        //------------------</ region: Buttons >------------------

        #endregion /Buttons

        #region Windows-Store

        //------------------< region: Windows-Store >------------------

        private StoreContext context = null;

        private StoreAppLicense appLicense = null;

        public async Task<bool> get_Store_LicenseInfo()

        {

            //-------------< get_Store_LicenseInfo()-------------

            if (context == null)

            {

                context = StoreContext.GetDefault();  //UWP App

            }

            workingProgressRing.IsActive = true;

            //< get Store Data >

            appLicense = await context.GetAppLicenseAsync();

            //</ get Store Data >

            workingProgressRing.IsActive = false;

            if (appLicense == null)

            {

                tbxStatus.Text = "An error occurred while retrieving the license.";

                return false ;

            }

            else

            {

                //--< show License Infos >--

                tbxStatus.Text = "APP-License" + Environment.NewLine + "SkuStoreId=" +  appLicense.SkuStoreId ;

                tbxStatus.Text += Environment.NewLine + "TrialUniqueId=" + Convert.ToString(appLicense.TrialUniqueId);

                tbxStatus.Text += Environment.NewLine + "IsActive=" + Convert.ToString(appLicense.IsActive );

                tbxStatus.Text += Environment.NewLine + "IsTrial=" +  Convert.ToString( appLicense.IsTrial);

                tbxStatus.Text += Environment.NewLine + Environment.NewLine + "AddOnLicenses=" + Convert.ToString(appLicense.AddOnLicenses.Count);

                //--</ show License Infos >--

            }

            // Access the add on licenses for add-ons for this app.

            tbxStatus.Text += Environment.NewLine + "< addOn-Licenses>" + Environment.NewLine;

            foreach (KeyValuePair<string, StoreLicense> item in appLicense.AddOnLicenses)

            {

                StoreLicense addOnLicense = item.Value;

                //--< addon Purchase Infos  >--

                tbxStatus.Text = "addOn-License" + Environment.NewLine + "IsActive=" + addOnLicense.IsActive;

                tbxStatus.Text += Environment.NewLine + "SkuStoreId=" + Convert.ToString(addOnLicense.SkuStoreId );

                tbxStatus.Text += Environment.NewLine + "InAppOfferToken=" + Convert.ToString(addOnLicense.InAppOfferToken );

                tbxStatus.Text += Environment.NewLine + "ExpirationDate=" + Convert.ToString(addOnLicense.ExpirationDate );               

                //--</ addon Purchase Infos >--

            }

            tbxStatus.Text += "</ addOn-Licenses>" + Environment.NewLine;

            return true;

            //-------------</ get_Store_LicenseInfo()-------------

        }

        public async void check_First_AddOn_Package()

        {

            //-------------< check_First_AddOn_Package()-------------

            if (context == null)

            {

                await get_Store_LicenseInfo();

            }

            //< check >

            //</ check >

            if (appLicense == null)

            {

                tbxStatus.Text = "appLicense is null.";

                return;

            }

            else

            {

                tbxStatus.Text = "AddOnLicenses.Count=" + Convert.ToString(appLicense.AddOnLicenses.Count);

                //--</ show License Infos >--

            }

            tbxStatus.Text += Environment.NewLine + "< addOn-License 1 >" + Environment.NewLine;

            foreach (KeyValuePair<string, StoreLicense> item in appLicense.AddOnLicenses)

            {

                StoreLicense addOnLicense = item.Value;

                //--< addon Purchase Infos  >--

                tbxStatus.Text = "addOn-License" + Environment.NewLine + "IsActive=" + addOnLicense.IsActive;               

                break;

                //--</ addon Purchase Infos >--

            }

            tbxStatus.Text += "</ addOn-License 1 >" + Environment.NewLine;

            return ;

            //-------------</ check_First_AddOn_Package()-------------

        }

        //------------------</region: Windows-Store >------------------

        #endregion /Windows-Store

    }

}

<Page

    x:Class="Check_InApp_Produkct_Status.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    xmlns:local="using:Check_InApp_Produkct_Status"

    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

        <Grid.ColumnDefinitions>

            <ColumnDefinition Width="180"/>

            <ColumnDefinition Width="63*"/>

        </Grid.ColumnDefinitions>

        <StackPanel Orientation="Vertical" >

            <Button  x:Name="btnGet_Addins" Click="btnGet_Addins_Click"

                     HorizontalAlignment="Left" Margin="10" VerticalAlignment="Top" Height="70" Width="160">

                Get License Infos

            </Button>

            <Button  x:Name="btnCheck_First_Addon" Click="btnCheck_First_Addon_Click"

                     HorizontalAlignment="Left" Margin="10" VerticalAlignment="Top" Height="70" Width="160">

                Check 1.Addon

            </Button>

            <ProgressRing x:Name="workingProgressRing" Height="100"  Width="100"></ProgressRing>

        </StackPanel>

        <Border Background="#F0F0F0" Grid.Column="1" Margin="20,20,20,20">

            <TextBlock x:Name="tbxStatus" HorizontalAlignment="Stretch"  TextWrapping="Wrap" Text="License Infos" VerticalAlignment="Stretch"  />

        </Border>

    </Grid>

</Page>

Windows.Services.Store.StoreContext context = StoreContext.GetDefault();