public void ViewTree(BindingList<ObjectTreeNode> listFoldersFiles, int idNode)
        {
            tTree.ClearNodes();
            TreeListNode t;
            foreach (ObjectTreeNode ob in listFoldersFiles)
            {
                t = tReportsTree.AppendNode(ob, idNode);
                { 
                    t.HasChildren = ob.hasFiles;
                    t.Tag = t.HasChildren;
                }
            }
        }

    public class ObjectTreeNode
    {
        public string chaildNodeName { get; set; }
        public bool hasFiles { get; set; }
        public int parentId { get; set; }
        public int nodeId { get; set; }
    }