【C#】wpf查找父子节点

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows;using System.Windows.Media;namespace TestSeagate.Common{    class UIAssociate    {        /// <summary>        /// 查找第一个父节点是T类型的节点，并返回。        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="dobj"></param>        /// <returns></returns>        public static T GetAncestor<T>(DependencyObject dobj) where T : FrameworkElement        {            DependencyObject parent = VisualTreeHelper.GetParent(dobj);//可视树 深入内部            while (!(parent is T) && parent != null)            {                parent = VisualTreeHelper.GetParent(parent);            }            if (parent != null)            {                return (T)parent;            } else            {                return null;            }        }        /// <summary>        /// 查找所有满足条件的子节点，        /// </summary>        /// <typeparam name="T"></typeparam>        /// <param name="depen"></param>        /// <param name="childname"></param>        /// <returns></returns>        public static List<T> GetChildren<T>(DependencyObject depen,string childname=null) where T:FrameworkElement        {            DependencyObject child = null;            List<T> lists = new List<T>();            for(int i=0;i<VisualTreeHelper.GetChildrenCount(depen);i++)            {                child = VisualTreeHelper.GetChild(depen,i);                if((child is T)&&(((T)child).Name==childname||string.IsNullOrEmpty(childname)))                {                    lists.Add((T)child);                }                lists.AddRange(GetChildren<T>(child, childname));            }            return lists;        }    }}