DataList::SelectedIndex Property
Gets or sets the index of the selected item in the DataList control.
Assembly: System.Web (in System.Web.dll)
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | The specified value is less than -1. |
Use the SelectedIndex property to programmatically specify the selected item in the DataList control. You can also use this property to determine the index of the selected item.
Note |
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The SelectedIndex property is zero based. |
To deselect an item, set the SelectedIndex property to -1.
The SelectedIndex property is stored in control state.
| Topic | Location |
|---|---|
| How to: Allow Users to Select Items in DataList Web Server Controls | Building ASP .NET Web Applications |
| How to: Allow Users to Select Items in DataList Web Server Controls | Building ASP .NET Web Applications |
The following code example demonstrates how to use the SelectedIndex property to specify the selected item in the DataList control.
Note |
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The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Page Code Model. |
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.
Note