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)

public:
[BindableAttribute(true)]
[BrowsableAttribute(false)]
[ThemeableAttribute(false)]
property int SelectedIndex {
	virtual int get();
	virtual void set(int value);
}

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.

Exception Condition
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.

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.

.NET Framework
Available since 1.1
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