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SelectionChangedEventArgs Class
Visual Studio 2008
Provides data for the SelectionChanged event.
Assembly: PresentationFramework (in PresentationFramework.dll)
The following example creates a ListBox and subscribes to the SelectionChanged event. It uses the SelectionChangedEventArgs to find the selected item in the ListBox.
<WrapPanel Width="500" Orientation="Horizontal" Name="rectanglesPanel"> <WrapPanel.Resources> <Style TargetType="Rectangle"> <Setter Property="Height" Value="20"/> <Setter Property="Width" Value="20"/> <Setter Property="Margin" Value="5"/> </Style> </WrapPanel.Resources> </WrapPanel> <ListBox Name="myListBox" HorizontalAlignment="Left" SelectionMode="Extended" Width="265" Height="55" Background="HoneyDew" SelectionChanged="myListBox_SelectionChanged" ItemsSource="{Binding Source={StaticResource Colors}}" IsSynchronizedWithCurrentItem="true"> </ListBox>
Private Sub myListBox_SelectionChanged(ByVal sender As Object, ByVal args As SelectionChangedEventArgs) Dim converter As BrushConverter = New BrushConverter() Dim color As String ' Show Rectangles that are the selected colors. For Each color In args.AddedItems If GetRectangle(color) Is Nothing Then Dim aRect As Rectangle = New Rectangle() aRect.Fill = CType(converter.ConvertFrom(color), Brush) aRect.Tag = color rectanglesPanel.Children.Add(aRect) End If Next ' Remove the Rectangles that are the unselected colors. For Each color In args.RemovedItems Dim removedItem As FrameworkElement = GetRectangle(color) If Not removedItem Is Nothing Then rectanglesPanel.Children.Remove(removedItem) End If Next End Sub Private Function GetRectangle(ByVal color As String) As FrameworkElement Dim rect As FrameworkElement For Each rect In rectanglesPanel.Children If rect.Tag.ToString() = color Then Return rect End If Next Return Nothing End Function
System.Object
System.EventArgs
System.Windows.RoutedEventArgs
System.Windows.Controls.SelectionChangedEventArgs
System.EventArgs
System.Windows.RoutedEventArgs
System.Windows.Controls.SelectionChangedEventArgs
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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