WindowsUpdates.xaml.cs

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Media.TextFormatting;
using System.Windows.Shapes;

using WUApiLib;

namespace Computer_Support_Info
{
    public partial class WindowsUpdates : Window, INotifyPropertyChanged
    {
        public ObservableCollection<WindowsUpdatesElement> WindowsUpdatesData
        {
            get; set;
        } = new ObservableCollection<WindowsUpdatesElement>();

        BackgroundWorker worker = null;
        bool isBusy;

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string name = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(name));
        }

        public bool IsBusy
        {
            get => isBusy;
            set
            {
                isBusy = value;
                OnPropertyChanged();
            }
        }

        public WindowsUpdates()
        {
            InitializeComponent();

            DataContext = this;
            //WindowsUpdatesGrid.ItemsSource = WindowsUpdatesData;

            IsBusy = true;

            worker = new BackgroundWorker();
            worker.DoWork += Worker_DoWork;
            worker.RunWorkerCompleted += Worker_RunWorkerCompleted;
            worker.RunWorkerAsync();

            this.Title += " (" + Assembly.GetExecutingAssembly().GetName().Version.ToString() + ") - Installierte Updates";

            Rect workArea = SystemParameters.WorkArea;

            this.Height = workArea.Height / 1.25;
            this.Width = workArea.Width / 1.75;

            this.Left = (workArea.Width - this.Width) / 2 + workArea.Left;
            this.Top = (workArea.Height - this.Height) / 2 + workArea.Top;

            this.Background = (SolidColorBrush)(new BrushConverter().ConvertFrom("#FFD8E8E5"));
        }

        private void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            IsBusy = false;
            this.Background = (SolidColorBrush)(new BrushConverter().ConvertFrom("#FFD8E8E5"));

            
            //TextOut.Text = string.Empty;
            //TextOut.Text = e.Result.ToString();
            //BtnStart.IsEnabled = true;
            //BtnExit.IsEnabled = true;
        }

        private void Worker_DoWork(object sender, DoWorkEventArgs e)
        {
            List<string> categoriesToExclude = Properties.Settings.Default.update_categories_to_exclude.Cast<string>().ToList().ConvertAll(x => x.ToLower().Trim());

            UpdateSession session = new UpdateSession();
            IUpdateSearcher searcher = session.CreateUpdateSearcher();
            searcher.Online = false;

            var count = searcher.GetTotalHistoryCount();
            if (count == 0) return;

            var history = searcher.QueryHistory(0, count);

            for (int i = 0; i < count; i++)
            {
                IUpdateHistoryEntry2 uhe = (IUpdateHistoryEntry2)history[i];

                var category = "n/a";

                ICategoryCollection categories = uhe.Categories;
                foreach (ICategory oc in categories)
                {
                    category = oc.Name;
                    break;
                }

                // check for excluded catgory
                if (categoriesToExclude.Contains(category.ToLower().Trim())) continue;

                var title = history[i].Title;

                IUpdateIdentity ident = history[i].UpdateIdentity;

                var id = ident.UpdateID;


                Application.Current.Dispatcher.Invoke(
                    new Action(() => {
                        WindowsUpdatesData.Add(new WindowsUpdatesElement()
                        {
                            Kb = id,
                            Title = title,
                            Date = history[i].Date.ToString(),
                            Result = history[i].ResultCode.ToString().Replace("orc", string.Empty),
                            Category = category
                        });
                    })
                );

                
            }
        }

        private void BtnExit_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }
}