ComboBox.OnSelectionChangeCommitted Method

protected virtual void OnSelectionChangeCommitted (
	EventArgs e
)

protected void OnSelectionChangeCommitted (
	EventArgs e
)

protected function OnSelectionChangeCommitted (
	e : EventArgs
)

Not applicable.

Parameters

e

An EventArgs that contains the event data.

SelectionChangeCommitted is raised only when the user changes the combo box selection. Do not use SelectedIndexChanged or SelectedValueChanged to capture user changes, because those events are also raised when the selection changes programmatically. This event is also raised when you set SelectedIndex.

Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.

The OnSelectionChangeCommitted method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors: When overriding OnSelectionChangeCommitted in a derived class, be sure to call the base class's OnSelectionChangeCommitted method so that registered delegates receive the event.

The following code example uses the SelectionChangeCommitted event and the SelectionLength property to change the length of the text box depending on what the user has selected and committed.

private void comboBox1_SelectionChangeCommitted(object sender, EventArgs e)
{

    ComboBox senderComboBox = (ComboBox) sender;
  
    // Change the length of the text box depending on what the user has 
    // selected and committed using the SelectionLength property.
    if (senderComboBox.SelectionLength > 0)
    {
        textbox1.Width = senderComboBox.SelectionLength *
            ((int) this.textbox1.Font.SizeInPoints);
        textbox1.Text = senderComboBox.SelectedText;
    }
}

private void comboBox1_SelectionChangeCommitted(Object sender, EventArgs e)
{
    ComboBox senderComboBox = (ComboBox)sender;
    // Change the length of the text box depending on what the user has 
    // selected and committed using the SelectionLength property.
    if (senderComboBox.get_SelectionLength() > 0) {
        textBox1.set_Width(senderComboBox.get_SelectionLength() * (int)(
            this.textBox1.get_Font().get_SizeInPoints()));
        textBox1.set_Text(senderComboBox.get_SelectedText());
    }
} //comboBox1_SelectionChangeCommitted

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework