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ListControl::SelectedIndex Property

Gets or sets the lowest ordinal index of the selected items in the list.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

[ThemeableAttribute(false)]
[BindableAttribute(true)]
[BrowsableAttribute(false)]
public:
virtual property int SelectedIndex {
	int get ();
	void set (int value);
}
<asp:ListControl SelectedIndex="Int32" />

Property Value

Type: System::Int32
The lowest ordinal index of the selected items in the list. The default is -1, which indicates that nothing is selected.

ExceptionCondition
ArgumentOutOfRangeException

The index was set to less than -1, or greater than or equal to the number of items on the list at the time the list is rendered.

Use this property to determine the index of the currently selected item in the list if the list control allows only one selection. If the list control supports multiple selections, use this property to determine the lowest index of the selected items.

The value of the SelectedIndex property is not specifically saved on postback. It is restored on postback using the SelectedValue property. For example, if the SelectedValue property is 4, on postback, the SelectedIndex property is set to the index of the ListItem object that has a Value property of 4. If more than one ListItem object has a Value property of 4, the first item in the Items collection is selected.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins Overview.

TopicLocation
How to: Determine the Selection in List Web Server ControlsBuilding ASP .NET Web Applications
How to: Determine the Selection in List Web Server ControlsBuilding ASP .NET Web Applications
How to: Set the Selection in List Web Server Controls (Visual Studio)Building ASP .NET Web Applications in Visual Studio

The following example demonstrates how to use SelectedIndex to determine the lowest index of the selected items in the CheckBoxList.

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

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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