private void OnValidationError(object sender, ValidationErrorEventArgs e)
{
// Get the current UIA ItemStatus from the element element.
var oldStatus = AutomationProperties.GetItemStatus((DependencyObject)sender);
// Set some sample new ItemStatus here...
var newStatus = e.Action == ValidationErrorEventAction.Added ? e.Error.ErrorContent.ToString() : String.Empty;
AutomationProperties.SetItemStatus((DependencyObject)sender, newStatus);
// Having just set the new ItemStatus, raise a UIA property changed event. Note that the peer may
// be null here unless a UIA client app such as Narrator or the AccEvent SDK tool are running.
var automationPeer = UIElementAutomationPeer.FromElement((UIElement)sender);
automationPeer?.RaisePropertyChangedEvent(AutomationElementIdentifiers.ItemStatusProperty, oldStatus, newStatus);
}
///
override protected string GetItemStatusCore()
{
return(AutomationProperties.GetItemStatus(_owner));
}