Load the Items in a ListBox Asynchronously : ListBox Item « Windows Presentation Foundation « VB.Net Tutorial

1. VB.Net Tutorial
2. Windows Presentation Foundation
3. ListBox Item

<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">

    <Window.Resources>
        <DataTemplate x:Key="ListItemTemplate">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding}" VerticalAlignment="Center"/>
            </StackPanel>
        </DataTemplate>
    </Window.Resources>
    <StackPanel>
        <ListBox x:Name="listBox" ItemTemplate= "{StaticResource ListItemTemplate}"/>
    </StackPanel>
</Window>
//File:Window.xaml.vb
Imports System.Collections.ObjectModel
Imports System.Windows
Imports System.Windows.Threading

Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Private numberDescriptions As ObservableCollection(Of String)

    Public Sub New()
      InitializeComponent()
    End Sub

    Private Sub Window_Loaded(sender As Object, e As RoutedEventArgs)
      numberDescriptions = New ObservableCollection(Of String)()

      listBox.ItemsSource = numberDescriptions

      Me.Dispatcher.BeginInvoke(DispatcherPriority.Background, New LoadNumberDelegate(AddressOf LoadNumber), 1)
    End Sub
    Private Delegate Sub LoadNumberDelegate(number As Integer)

    Private Sub LoadNumber(number As Integer)
      numberDescriptions.Add("Number " & number.ToString())
      Me.Dispatcher.BeginInvoke(DispatcherPriority.Background, New LoadNumberDelegate(AddressOf LoadNumber), System.Threading.Interlocked.Increment(number))
    End Sub
  End Class
End Namespace

16.31.ListBox Item
	16.31.1.	ListBox with Image item
	16.31.2.	Use Panel as a ListBoxItem
	16.31.3.	Get Item At Index Position [0]
	16.31.4.	Handles ListBoxItem Selected events for the ListBoxItems in the inner ListBox.
	16.31.5.	Different Font Family and Size for each ListBoxItem
	16.31.6.	List box with text and non-text content in the list box items.
	16.31.7.	List box that uses data binding to populate the list box items.
	16.31.8.	Load the Items in a ListBox Asynchronously
	16.31.9.	Change the Appearance of Alternate Items in a List
	16.31.10.	Change the Appearance of a List Item When It's Selected