在WPF項目中查找未凍結的畫筆

Question

我試圖弄清楚如何在Applications資源中找到所有不是Freeze="true" Brush對象。

到目前為止，我所做的是：

var temp = this.FindLogicalChildren<Brush>();
var resourceDictionary = Application.Current.Resources;

var resources = GetResources(resourceDictionary);

var brushes = resources.Cast<DictionaryEntry>()
     .Where(e => e.Value is Brush).Where(e => !(e.Value as Brush)?.IsFrozen ?? false);
foreach (var entry in brushes)
   ....

但是，這種方法不能滿足標准。 知道我在這里想念什么嗎？

Answer 1

因此，我發現這個緩存的網站似乎可以提供答案：

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;
                }
            }
        }
    }
    foreach (Freezable item in FindVisualChildren<Freezable>(myWin))
    if( item != null && item.CanFreeze)item.Freeze();