LookUpEdit.SelectionChanging Event

Occurs before a user selects an item in the editor’s popup. This event works in Multiple Item Selection mode only.

Namespace: DevExpress.XtraEditors

Assembly: DevExpress.XtraEditors.v23.2.dll

NuGet Package: DevExpress.Win.Navigation

Declaration

C#

[DXCategory("Events")]
public event EventHandler<PopupSelectionChangingEventArgs> SelectionChanging

VB.NET

<DXCategory("Events")>
Public Event SelectionChanging As EventHandler(Of PopupSelectionChangingEventArgs)

Event Data

The SelectionChanging event's data class is PopupSelectionChangingEventArgs. The following properties provide information specific to this event:

Property	Description
Cancel	Gets or sets whether to cancel the change selection operation.
IsSelected	Gets whether the item is selected.

Remarks

The SelectionChanging event allows you to retain the item’s selected state. The following code sample does not allow users to toggle the first item’s selection:

C#

private void lookUpEdit1_SelectionChanging(object sender, DevExpress.XtraEditors.Controls.PopupSelectionChangingEventArgs e) {
    e.Cancel = e.RecordIndex == 0;
}

VB.NET

Private Sub lookUpEdit1_SelectionChanging(ByVal sender As Object, ByVal e As DevExpress.XtraEditors.Controls.PopupSelectionChangingEventArgs)
    e.Cancel = e.RecordIndex = 0
End Sub