private static void OnTargetPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FrameworkElement oldElement = e.OldValue as FrameworkElement;
ValidationSummary vs = d as ValidationSummary;
EventHandler <ValidationErrorEventArgs> handler = new EventHandler <ValidationErrorEventArgs>(vs.Target_BindingValidationError);
if (vs._registeredParent != null)
{
vs._registeredParent.BindingValidationError -= handler;
vs._registeredParent = null;
}
if (oldElement != null)
{
oldElement.BindingValidationError -= handler;
}
FrameworkElement newElement = e.NewValue as FrameworkElement;
if (newElement != null)
{
newElement.BindingValidationError += handler;
}
// Clear the old property binding errors
vs._errors.ClearErrors(ValidationSummaryItemType.PropertyError);
vs.UpdateDisplayedErrors();
}
private static void OnFilterPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ValidationSummary vs = d as ValidationSummary;
if (vs != null)
{
vs.UpdateDisplayedErrors();
}
}
/// <summary>
/// When one of the input controls has its ShowErrorsInSummary property changed, we have to go through all the ValidationSummaries on the page and update them
/// </summary>
/// <param name="parent">The parent ValidationSummary</param>
private static void UpdateDisplayedErrorsOnAllValidationSummaries(DependencyObject parent)
{
if (parent == null)
{
return;
}
ValidationSummary vs = parent as ValidationSummary;
if (vs != null)
{
vs.UpdateDisplayedErrors();
return;
}
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(parent, i);
UpdateDisplayedErrorsOnAllValidationSummaries(child);
}
}