treeview用法

主要是用的默认的控件

private void loadTree()

        {

            DataSet ds = new DataSet();

            ds = cn.Inquire("1=1");

            if (ds.Tables[0].Rows.Count <= 0)

            {

                this.T编辑.Enabled = false;

                this.T删除.Enabled = false;

            }

            treeList1.ClearNodes();

            AddTree("0", null, ds);

            treeList1.ExpandAll();

        }

        // 递归添加树的节点

        public void AddTree(string ParentID,TreeNode pNode, DataSet ds)

        {

            TreeNode tt = null;

            DataRow[] qy = ds.Tables[0].Select("[父节点]='" + ParentID + "'");

            for (int i = 0; i < qy.Length; i++)

            {

                if (pNode == null)

                {

                    tt = treeList11.Nodes.Add(qy[i]["TID"].ToString() + " " + qy[i]["类别名称"].ToString());

                    AddTree(qy[i]["TID"].ToString(), tt, ds);

                    continue;

                }

                tt = pNode.Nodes.Add(qy[i]["TID"].ToString() + " " + qy[i]["类别名称"].ToString());

                AddTree(qy[i]["TID"].ToString(), tt, ds);

            

            }

        }