Handling SelectionChanged event for DataFormComboBoxField
DataFormComboBoxField does not have a SelectionChanged event itself. In case you need such an event to implement your additional logic, you can handle the SelectionChanged event of its editing element (RadComboBox). To do that you need to:
1) Register an event handler for the SelectionChanged event:
Example 1: Adding event handler for the SelectionChanged event
this.AddHandler(RadComboBox.SelectionChangedEvent, new System.Windows.Controls.SelectionChangedEventHandler(OnSelectionChanged));
Me.AddHandler
You should add a using statement to Telerik.Windows namespace in order to be able to add the handler.
2) Check if any items were unselected throught RemovedItems.Count
Example 2: Check if any items were unselected
private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (e.RemovedItems.Count > 0)
{
//your code here
}
}
Private Sub OnSelectionChanged(sender As Object, e As SelectionChangedEventArgs)
'your code here
If e.RemovedItems.Count > 0 Then
End If
End Sub
Checking if there are any items being unselected through the RemovedItems.Count ensures that the event will not be handled on the initial loading when a default item has been selected.