C#--WPF遍循ListBox子控件

@Crazy Snail2024-05-24 8:35
1.代码部分

cs 复制代码
        //Listbox--Name wList
        private void Page_Loaded(object sender, RoutedEventArgs e)
        {
            BoatIdVM.Instance.Active(null);
            if (Setting5VM.Instance.DicCanExecute["BoatID33"](null))
            {
                DG.IsReadOnly = false;
                for (int i = 0; i < wList.Items.Count; i++)
                {
                    var itemContainer = wList.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
                    if (itemContainer != null)
                    {
                        var button = FindVisualChild<Button>(itemContainer);
                        if (button != null)
                        {
                            button.IsEnabled = true;
                        }
                    }
                }
            }
            else
            {
                DG.IsReadOnly = true;//只读

                for (int i = 0; i < wList.Items.Count; i++)
                {
                    var itemContainer = wList.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
                    if (itemContainer != null)
                    {
                        var button = FindVisualChild<Button>(itemContainer);
                        if (button != null)
                        {
                            button.IsEnabled = false;
                        }
                    }
                }
            }
        }

        // FindVisualChild方法用于在VisualTree中查找指定类型的子元素
        private T FindVisualChild<T>(DependencyObject parent) where T : DependencyObject
        {
            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
            {
                var child = VisualTreeHelper.GetChild(parent, i);
                if (child is T typedChild)
                {
                    return typedChild;
                }

                var result = FindVisualChild<T>(child);
                if (result != null)
                {
                    return result;
                }
            }
            return null;
        }
2.小结

上述代码完成对于可视化树下面子控件的遍历，日常使用记录