[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[0];   

                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[0];   

                        DataRow[] dar = dtb.Select(" parentId='" + tn.Value + "'");   

                        parentId = tn.Value;   

                        BindTree(tview,tn, parentId,sql);   

                }   

        }