[ASP.NET]动态绑定树控件：

public void BindTree(TreeView tview, TreeNode tn_main, string parentId,string sql)
        {
                TreeNode tn=null;
                tview.Font.Size = FontUnit.Small;
                tview.ForeColor = System.Drawing.Color.Black;
                DB db = new DB();
                DataSet ds = db.GetDataSet(sql, "table1");
                DataTable dTable = ds.Tables[];
                DataRow[] drows = dTable.Select(" parentId='"+parentId+"'");
                foreach (DataRow drow in drows)
                {
                        tn = new TreeNode();
                        tn.Text = drow["modulName"].ToString();
                        tn.Value = drow["modulId"].ToString();
                        tn.SelectAction = TreeNodeSelectAction.Expand;
                        tn.NavigateUrl = "Default2.aspx";
                        tn.Expanded = true;
                        if (tn_main == null)
                        {
                                tview.Nodes.Add(tn);
                        }
                        else
                        {
                                tn_main.ChildNodes.Add(tn);
                        }
                        DataSet dst = db.GetDataSet(sql, "table2");
                        DataTable dtb = dst.Tables[];
                        DataRow[] dar = dtb.Select(" parentId='" + tn.Value + "'");
                        parentId = tn.Value;
                        BindTree(tview,tn, parentId,sql);
                }
        }