Load the Data for a Window Asynchronously After It Has Rendered
<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;
}
}
}
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