Specifies the selection behavior of a list box.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following example demonstrates how to use the GetSelected method to determine which items in a ListBox are selected in order to select the items that are not selected and deselect the items that are selected. The example also demonstrates using the SelectionMode property to enable a ListBox to have more than one selected item and uses the Sorted property to demonstrate how to sort items in a ListBox automatically. This example assumes that a ListBox, named listBox1, has been added to a form and that the InitializeMyListBox method defined in the example is called from the Load event of the form.
Private Sub InitializeMyListBox() ' Add items to the ListBox. listBox1.Items.Add("A") listBox1.Items.Add("C") listBox1.Items.Add("E") listBox1.Items.Add("F") listBox1.Items.Add("G") listBox1.Items.Add("D") listBox1.Items.Add("B") ' Sort all items added previously. listBox1.Sorted = True ' Set the SelectionMode to select multiple items. listBox1.SelectionMode = SelectionMode.MultiExtended ' Select three initial items from the list. listBox1.SetSelected(0, True) listBox1.SetSelected(2, True) listBox1.SetSelected(4, True) ' Force the ListBox to scroll back to the top of the list. listBox1.TopIndex = 0 End Sub Private Sub InvertMySelection() Dim x As Integer ' Loop through all items the ListBox. For x = 0 To listBox1.Items.Count - 1 ' Determine if the item is selected. If listBox1.GetSelected(x) = True Then ' Deselect all items that are selected. listBox1.SetSelected(x, False) Else ' Select all items that are not selected. listBox1.SetSelected(x, True) End If Next x ' Force the ListBox to scroll back to the top of the list. listBox1.TopIndex = 0 End Sub
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
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.