/// <summary>
/// 递归取出所有上级
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
private static List <T> GetParents <T>(ITreeParent <T> t) where T : ITreeParent <T>
{
var list = new List <T>()
{
t.Parent
};
return(t.Parent != null?list.Union(GetParents(t.Parent)).ToList() : list);
}
/// <summary> /// 深度层级 /// </summary> public static int Level <T>(this ITreeParent <T> tree) where T : ITreeParent <T> => IsRoot(tree) ? 1 : Level(tree.Parent) + 1;
/// <summary> /// 是否是根节点 /// </summary> public static bool IsRoot <T>(this ITreeParent <T> tree) where T : ITreeParent <T> => tree.Parent == null;
/// <summary> /// 所有父级 /// </summary> public static ICollection <T> AllParent <T>(this ITreeParent <T> tree) where T : ITreeParent <T> => GetParents(tree);
