Can I create an extension method for a WPF UserControl that can return a list of its controls?

Is this possible while the controls are not publicly exposed through proper开发者_StackOverflow社区ties ?

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this is easy to achive: (code from this SO question)

public static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
    if (depObj != null)
    {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
        {
            DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
            if (child != null && child is T)
            {
                yield return (T)child;
            }

            foreach (T childOfChild in FindVisualChildren<T>(child))
            {
                yield return childOfChild;
            }
        }
    }
}

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If a control is part of the Visual Tree of that UserControl, then yes, you can list all the visual children of that control. And you can wrap that logic in an extension method.

You can use VisualTreeHelper class for it.