Selector::SelectedIndex Property

Gets or sets the index of the first item in the current selection or returns negative one (-1) if the selection is empty.

Namespace:  System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

[LocalizabilityAttribute(LocalizationCategory::NeverLocalize)]
[BindableAttribute(true)]
public:
property int SelectedIndex {
	int get ();
	void set (int value);
}
<object SelectedIndex="int" .../>

Property Value

Type: System::Int32
The index of first item in the current selection. The default value is negative one (-1).

If a Selector supports selecting a single item, the SelectedIndex property returns the index of the selected item. If a Selector supports multiple selections, SelectedIndex returns the index of the item that the user selected first.

Setting SelectedIndex in a Selector that supports multiple selections clears existing selected items and sets the selection to the item specified by the index. SelectedIndex returns -1 if selection is empty.

If you set SelectedIndex to a value less that -1, an ArgumentException is thrown. If you set SelectedIndex to a value equal or greater than the number of child elements, the value is ignored.

The following example creates a ListBox and sets the SelectedIndex property to 1, which selects the second item in the ListBox.


<ListBox Margin="10,0,0,5" SelectedIndex="1"
  Name="listBox1" VerticalAlignment="Top" Grid.Column="0" Grid.Row="4">
  <ListBoxItem>Item 0</ListBoxItem>
  <ListBoxItem>Item 1</ListBoxItem>
  <ListBoxItem>Item 2</ListBoxItem>
  <ListBoxItem>Item 3</ListBoxItem>
</ListBox>


The following example uses the SelectedIndex property to determine whether the item at index 0 is the first item in the selection.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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