递归建树

        treeProjectDs = dataAccess.SelectFolder();
        AddTree(0, (TreeNode)null); //调用递归函数，完成树形结构的生成

//绑定项目树控件
        public void AddTree(int FATHERID, TreeNode pNode)
        {
            DataView dvTree = new DataView(ds.Tables[0]);
            //过滤ParentID,得到当前的所有子节点
            dvTree.RowFilter = "FATHERID = " + FATHERID;
            foreach (DataRowView Row in dvTree)
            {
                TreeNode Node = new TreeNode();
                Node.NavigateUrl = "http://www.baidu.com";
                Node.Target = "mainFrame";
                if (pNode == null)
                {
                    //添加根节点
                    Node.Text = Row["EQNAME"].ToString();
                    TreeView1.Nodes.Add(Node);
                    Node.Expanded = true; //节点状态展开
                    AddTree(Int32.Parse(Row["EQid"].ToString()), Node);
                }
                else
                {
                    //添加当前节点的子节点

                    Node.Text = Row["EQNAME"].ToString();
                    pNode.Nodes.Add(Node);
                    Node.Expanded = true; //节点状态展开
                    AddTree(Int32.Parse(Row["EQID"].ToString()), Node);
                    //再次递归
                }
            }
        }