Web TreeView 加载级联数据

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

                dt = BLL.GetTable();

                LoadLYRProperties(, null);

            }

        }

        private DataTable dt = null;

        public void Load(int FID, TreeNode pNode)

        {

            DataView dvTree = new DataView(dt);

            //过滤ParentID,得到当前的所有子节点

            dvTree.RowFilter = "[FID] = " + FID;

            foreach (DataRowView Row in dvTree)

            {

                TreeNode root = new TreeNode();

                if (pNode == null)

                {   

                    root.Text = Row["NAME"].ToString();

                    tvLyrProperties.Nodes.Add(root);

                    root.Expanded = true;

                    root.Value = Row["ID"].ToString();

                    LoadLYRProperties(Int32.Parse(Row["ID"].ToString()), root);    //递归

                }

                else

                {   //添加当前节点的子节点

                    TreeNode subroot = new TreeNode();

                    subroot.Text = Row["NAME"].ToString();

                    pNode.ChildNodes.Add(subroot);

                    subroot.Expanded = true;

                    subroot.Value = Row["ID"].ToString();

                    LoadLYRProperties(Int32.Parse(Row["ID"].ToString()), subroot);

                }

            }

        }