循环第一个根节点（Nodes[0]）下的子节点（Node）并添加子节点
 foreach (Node tn in clTree1.advTree1.Nodes[0].Nodes)
            {
                                    Node n = new Node();
                    n.Text = "a";
                                      n.Cells.Add(new DevComponents.AdvTree.Cell("b")
                    n.Cells.Add(new DevComponents.AdvTree.Cell("c");


                    tn.Nodes.Add(n);
                }
隐藏节点第3列的数据
clTree1.advTree1.Columns[3].Visible = false;
private void AdvTree1_NodeClick(object sender, DevComponents.AdvTree.TreeNodeMouseEventArgs e)
        {
            //是否选中的是父节点还是子节点（选中父节点会报错）
            if (e.Node.Nodes.Count != 0 || e.Node.Parent == null)
            {
                return;
            }
            //获取选中节点的全部内容
            string n = clTree1.advTree1.SelectedNode.ToString();
            //获取选中节点索引wei0的内容
            string falg_str = e.Node.Cells[0].Text.ToString().Trim();
          }        

0.属性和方法

//属性方法
advTree1.DragDropEnabled = !advTree1.DragDropEnabled;//控制是否可以拖动节点到 不同的层级下
advTree1.MultiSelect = !advTree1.MultiSelect;//控制节点是否可以多选
advTree1.ExpandButtonType = DevComponents.AdvTree.eExpandButtonType.Triangle;//展开节点前边的图标 三角形
advTree1.ExpandButtonType = DevComponents.AdvTree.eExpandButtonType.Ellipse;//圆形中间一个线
advTree1.ExpandButtonType = DevComponents.AdvTree.eExpandButtonType.Image;//展开下边1的图 折叠下边0的图
advTree1.ExpandImage = imageList1.Images[1];
advTree1.ExpandImageCollapse = imageList1.Images[0];
advTree1.ExpandButtonType = DevComponents.AdvTree.eExpandButtonType.Rectangle;//默认方块形中间加一个线
advTree1.ExpandButtonSize = new Size(10, 10);//展开按钮大小 默认8，8
advTree1.SelectionBoxStyle = DevComponents.AdvTree.eSelectionStyle.FullRowSelect;//选中一行
// advTree1.Nodes.Clear();//清空所有节点
advTree1.ExpandAll();//全部展开
advTree1.CollapseAll();//全部折叠
Node n = advTree1.SelectedNode.Copy();//复制先中节点
advTree1.SelectedNode.Remove();//移除节点
advTree1.Nodes.Add(n);//添加节点

1.对advTree操作都是在Nodes属性基础上的如:新建 一个Node并添加到tree中

Node n = new Node();//节点下再加节点 像部门档案等可递归实现
n.Text = "小张";
n.Nodes.Add(new Node("男"));
n.Nodes.Add(new Node("18"));
n.Nodes.Add(new Node("小张永远18，你懂得")); 
n.Nodes.AddRange(new Node[] { new Node("汉"), new Node("有三个女朋友")});//集合增加
advTree1.Nodes.Add(n);

2.取选中节点的值

advTree1.SelectedNode.Text;

 3.选中时节点 执行操作（SelectedIndexChanged） 

private void AdvTree1_SelectedIndexChanged(object sender, EventArgs e)
        {
            //MessageBox.Show(advTree1.SelectedNode.Text);
     
            //层级
            if (advTree1.SelectedNode.Level == 0)
            {
                //语句1
            }
            else if (advTree1.SelectedNode.Level ==1)
            {
                //语句2
            }
        }