C#中TreeView与数据库绑定

protected void CreateTreeView()
        {
            TreeNode rootNode = new TreeNode();
            rootNode.Text = "全部";
            rootNode.Value = "-1";
            BasicTypeTreeView.Nodes.Add(rootNode);

            BasicInformationManager BasicManager = new BasicInformationManager();
            var tlist = BasicManager.GetAllBasicInfoTypes();
            foreach (Model.BasicInforType mtype in tlist)
            {
                if (mtype.ParentID == 0)
                {
                    TreeNode Node = new TreeNode();
                    //添加根节点
                    Node.Text = mtype.BasicTypeName;
                    Node.Value = mtype.ID.ToString();
                    Node.ToolTip = "编码" + mtype.BasicCode;
                    getSubNode(ref Node, mtype.ID);
                    rootNode.ChildNodes.Add(Node);
                }
            }
        }

        /// <summary>
        /// 获取treeView子节点
        /// </summary>
        /// <param name="node"></param>
        /// <param name="item"></param>
        public void getSubNode(ref TreeNode node, int item)
        {
            BasicInformationManager BasicManager = new BasicInformationManager();
            var tlist = BasicManager.GetBasicInforTypeByParentId(item);
            if (tlist.Count > 0)
            {
                foreach (Model.BasicInforType m in tlist)
                {
                    TreeNode subNode = new TreeNode();
                    subNode.Text = m.BasicTypeName;
                    subNode.Value = m.ID.ToString();
                    subNode.ToolTip = "编码" + m.BasicCode;
                    getSubNode(ref subNode, m.ID);
                    node.ChildNodes.Add(subNode);   //进行子节点循环添加
                }
            }
        }