asp.net TreeView递归循环子节点生成树形菜单实例_实用技巧_

 /// 
 /// 生成根节点 /// 
 ///  protected void BindTreeView(long ID, TreeView treeview) { DataTable dt = menuLogic.GetMenu2(ID, User.Identity.Name); treeview.Nodes.Clear(); DataRow[] parentrow = dt.Select("par_id=0"); for (int i = 0; i < parentrow.Length; i++) { TreeNode rootnode = new TreeNode(); rootnode.Text = parentrow[i]["node_name"].ToString(); //parentrow[i][3].ToString(); rootnode.Value = parentrow[i]["ID"].ToString(); //parentrow[i][1].ToString(); 主键 rootnode.Expanded = true; rootnode.Selected = false; rootnode.SelectAction = TreeNodeSelectAction.None; treeview.Nodes.Add(rootnode); CreateChildNode(rootnode, dt); // } } /// 
 /// 生成子节点 /// 
 ///  ///  protected void CreateChildNode(TreeNode parentNode, DataTable datatable) { DataRow[] rowlist = datatable.Select("par_id=" + parentNode.Value); for (int i = 0; i < rowlist.Length; i++) { TreeNode node = new TreeNode(); if (datatable.Select("par_id=" + rowlist[i]["ID"].ToString().Trim()).Length > 0) { node.Text = rowlist[i]["node_name"].ToString(); node.Value = rowlist[i]["ID"].ToString(); } else { node.Text = "" + rowlist[i]["node_name"].ToString() + ""; node.Value = rowlist[i]["ID"].ToString(); } node.Expanded = false; node.Selected = false; node.SelectAction = TreeNodeSelectAction.None; parentNode.ChildNodes.Add(node); CreateChildNode(node, datatable); //递归调用 } }