treeview及无限递归算法.docVIP

.aspx文件内容： %@ Page Language=C# AutoEventWireup=true Debug=true CodeFile=Default.aspx.cs Inherits=_Default % !DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN /TR/xhtml1/DTD/xhtml1-transitional.dtd html xmlns=/1999/xhtml head runat=server title无标题页/title /head body form id=form1 runat=server div asp:TreeView ID=TreeView1 runat=server /asp:TreeView /div /form /body /html .cs文件内容: using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Collections.Generic; using System.Web.UI.MobileControls; using aaa; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if(!Page.IsPostBack){ AddTree(0, (TreeNode)null); } } //递归添加树的节点 public void AddTree(int ParentID, TreeNode pNode) { string aa = Data Source1647\\SQLEXPRESS;Initial Catalog=Tree;Integrated Security=True; SqlConnection conn = new SqlConnection(aa); string sql = select * from tree;//查询一级节点 SqlDataAdapter adapter = new SqlDataAdapter(sql, conn); DataSet ds1 = new DataSet(); adapter.Fill(ds1, tree); DataView dvTree = new DataView(ds1.Tables[0]); //过滤ParentID,得到当前的所有子节点 dvTree.RowFilter = [parentid] = + ParentID; foreach (DataRowView Row in dvTree) { TreeNode Node = new TreeNode(); if (pNode == null) { //添加根节点 Node.Text = Row[department].ToString(); TreeView1.Nodes.Add(Node); Node.Expanded = true; AddTree(Int32.Parse(Row[id].ToString()), Node); //再次递归 } else { //?添加当前节点的子节点 Node.T