How to: Get a ListBoxItem

If you need to get a specific ListBoxItem at a particular index in a ListBox you can use ItemContainerGenerator. The following example shows the ListBox and its items.

Example

<ListBox Margin="10,0,0,5" Name="lb" VerticalAlignment="Top" Grid.Column="0" Grid.Row="2">
    <ListBoxItem>Item 0</ListBoxItem>
    <ListBoxItem>Item 1</ListBoxItem>
    <ListBoxItem>Item 2</ListBoxItem>
    <ListBoxItem>Item 3</ListBoxItem>
</ListBox>

This example shows how to retrieve the item by specifying the index of the item in the ContainerFromIndex property.

private void GetIndex0(object sender, RoutedEventArgs e)
{
  ListBoxItem lbi = (ListBoxItem)
      (lb.ItemContainerGenerator.ContainerFromIndex(0));
  Item.Content = "The contents of the item at index 0 are: " +
      (lbi.Content.ToString()) + ".";
}

Sub GetIndex0(ByVal Sender As Object, ByVal e As RoutedEventArgs)

    Dim lbi As ListBoxItem = CType( _
        lb.ItemContainerGenerator.ContainerFromIndex(0), ListBoxItem)
    Item.Content = "The contents of the item at index 0 are: " + _
        (lbi.Content.ToString()) + "."
End Sub

Once you have retrieved the list box item you can do things such as display the contents of the item as shown in this example.

Item.Content = "The contents of the item at index 0 are: " +
    (lbi.Content.ToString()) + ".";

Item.Content = "The contents of the item at index 0 are: " + _
    (lbi.Content.ToString()) + "."

For the complete sample see Get ListBoxItem with Index Sample.

See Also

Other Resources

Get a ComboBoxItem with Index Sample