<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="200" Width="300" Loaded="Window_Loaded"> <StackPanel> <TextBlock>One Million Numbers:</TextBlock> <ListBox x:Name="listBox"/> </StackPanel> </Window> //File:Window.xaml.cs using System.Windows; using System.Windows.Threading; using System.Collections.Generic; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { this.Dispatcher.BeginInvoke(DispatcherPriority.Background,new LoadNumbersDelegate(LoadNumbers)); } private delegate void LoadNumbersDelegate(); private void LoadNumbers() { List<string> numberDescriptions = new List<string>(); for(int i = 1; i <= 1000000; i++) { numberDescriptions.Add("Number " + i.ToString()); } listBox.ItemsSource = numberDescriptions; } } }
