internal static bool ValidateWithoutUpdate(FrameworkElement element)
{
bool result = true;
BindingGroup bindingGroup = element.BindingGroup;
DataGridCell cell = (element != null) ? element.Parent as DataGridCell : null;
if (bindingGroup != null && cell != null)
{
Collection <BindingExpressionBase> expressions = bindingGroup.BindingExpressions;
BindingExpressionBase[] bindingExpressionsCopy = new BindingExpressionBase[expressions.Count];
expressions.CopyTo(bindingExpressionsCopy, 0);
for (int i = 0; i < bindingExpressionsCopy.Length; i++)
{
// Check the binding's target element - it might have been GC'd
// (this can happen when column-virtualization is enabled, see Dev11 131232).
// If so, fetching TargetElement will detach the binding and remove it
// from the binding group's collection. This side-effect is why we
// loop through a copy of the original collection, and don't rely
// on i to be a valid index into the original collection.
BindingExpressionBase beb = bindingExpressionsCopy[i];
DependencyObject targetElement = beb.TargetElement;
if (targetElement != null &&
VisualTreeHelper.IsAncestorOf(cell, targetElement, typeof(DataGridCell)))
{
result = beb.ValidateWithoutUpdate() && result;
}
}
}
return(result);
}