ComboBox.SelectedIndex Property

 

Gets or sets the index specifying the currently selected item.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

<BrowsableAttribute(False)>
Public Overrides Property SelectedIndex As Integer

Property Value

Type: System.Int32

A zero-based index of the currently selected item. A value of negative one (-1) is returned if no item is selected.

Exception Condition
ArgumentOutOfRangeException

The specified index is less than or equal to -2.

-or-

The specified index is greater than or equal to the number of items in the combo box.

This property indicates the zero-based index of the currently selected item in the combo box list. Setting a new index raises the SelectedIndexChanged event.

SelectedIndex, SelectedValue, and FormattingEnabled are related as follows:

System_CAPS_noteNote

To deselect the currently selected item, set the SelectedIndex to -1. You cannot set the SelectedIndex of a ComboBox item to -1 if the item is a data-bound item.

The following code example show how to use the FindString method and SelectedIndex property. The example is part of a complete example in the ComboBox class overview.

Private Sub findButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim index As Integer
    index = comboBox1.FindString(textBox2.Text)
    comboBox1.SelectedIndex = index
End Sub

.NET Framework
Available since 1.1
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