ListBox.SetSelected Method
Selects or clears the selection for the specified item in a ListBox.
Namespace: System.Windows.Forms
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Parameters
- index
- Type: System.Int32
The zero-based index of the item in a ListBox to select or clear the selection for.
- value
- Type: System.Boolean
true to select the specified item; otherwise, false.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | The specified index was outside the range of valid values. |
| InvalidOperationException | The SelectionMode property was set to None. |
You can use this property to set the selection of items in a multiple-selection ListBox. To select an item in a single-selection ListBox, use the SelectedIndex property.
The following code example demonstrates how to create a ListBox control that displays multiple items in columns and can have more than one item selected in the control's list. The code for the example adds 50 items to the ListBox using the Add method of the ListBox.ObjectCollection class and then selects three items from the list using the SetSelected method. The code then displays values from the ListBox.SelectedObjectCollection collection (through the SelectedItems property) and the ListBox.SelectedIndexCollection (through the SelectedIndices property). This example requires that the code is located in and called from a Form.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
