DataTrigger, ListBox and user object : ListBox « Windows Presentation Foundation « VB.Net Tutorial

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

<Window x:Class="DataTriggerSample.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:c="clr-namespace:DataTriggerSample"
  Title="DataTriggerSample" Height="300" Width="300">
  <Window.Resources>
    <c:People x:Key="PeopleData"/>

    <Style TargetType="{x:Type ListBoxItem}">
      <Style.Triggers>
        <DataTrigger Binding="{Binding Path=Name}" Value="A">
          <Setter Property="Background" Value="Yellow" />
        </DataTrigger>
        <MultiDataTrigger>
          <MultiDataTrigger.Conditions>
            <Condition Binding="{Binding Path=Name}" Value="S" />
          </MultiDataTrigger.Conditions>
          <MultiDataTrigger.Setters>
            <Setter Property="Background" Value="LightGreen" />
          </MultiDataTrigger.Setters>
        </MultiDataTrigger>
      </Style.Triggers>
    </Style>

    <DataTemplate DataType="{x:Type c:Person}">
      <Canvas Width="260" Height="20">
        <TextBlock FontSize="12" Width="130" Canvas.Left="0" Text="{Binding Path=Name}"/>
      </Canvas>
    </DataTemplate>
  </Window.Resources>

  <StackPanel>
    <TextBlock FontSize="18" Margin="5" FontWeight="Bold"
      HorizontalAlignment="Center">Data Trigger Sample</TextBlock>
    <ListBox Width="250" HorizontalAlignment="Center" Background="White"
      ItemsSource="{Binding Source={StaticResource PeopleData}}"/>
  </StackPanel>

</Window>
//File:Window.xaml.vb

Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes
Imports System.Collections.ObjectModel

Namespace DataTriggerSample
  Public Partial Class Window1
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
    End Sub
  End Class

  Public Class Person
    Private _name As String
    Public Property Name() As String
      Get
        Return _name
      End Get
      Set
        _name = value
      End Set
    End Property

    Public Sub New(name As String)
      Me._name = name
    End Sub
  End Class

  Public Class People
    Inherits ObservableCollection(Of Person)
    Public Sub New()
      Add(New Person("A"))
      Add(New Person("B"))
      Add(New Person("C"))
    End Sub
  End Class

End Namespace

16.27.ListBox
	16.27.1.	Bind String Array Resource to ListBox
	16.27.2.	Use Data Templates to Display Bound Data
	16.27.3.	CheckBox List
	16.27.4.	Convert the contents of a ListBoxItem to an instance of GridLength by using GridLengthConverter
	16.27.5.	Use the FontSizeConverter class to convert the content of a ListBoxItem to a value that represents the size of a font.
	16.27.6.	Convert contents of a ListBoxItem to an instance of Thickness by using the ThicknessConverter
	16.27.7.	DataTrigger, ListBox and user object
	16.27.8.	Add selected file to ListBox
	16.27.9.	This list box allows items to be selected in groups by using the SHIFT key and mouse or the CTRL key and space key.
	16.27.10.	Iterate through the selected items and remove each one
	16.27.11.	Ensure there is at least one item selected