using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using Microsoft.Web.UI.WebControls;
using System.Data.SqlClient;



namespace hzquery.menu
{
 /// <summary>
 /// menu_Left 的摘要说明。
 /// </summary>
 public class menu_Left : System.Web.UI.Page
 {
  [color=#FF0000]protected Microsoft.Web.UI.WebControls.TreeView tvMenu;[/color]
  SqlConnection Conn;
  SqlDataAdapter myCmd;
  DataSet ds;
  string cmdSelect;



  private void Page_Load(object sender, System.EventArgs e)
  {
   Conn=new SqlConnection(Application["ConnString"].ToString());
   CreateDataSet();
   [color=#FF0000]InitTree(tvMenu.Nodes,"0");[/color]
  }
  //建立数据集
  private DataSet CreateDataSet()
  {
   cmdSelect="select * from S_Menu";
   myCmd=new SqlDataAdapter(cmdSelect,Conn);
   ds=new DataSet();
   myCmd.Fill(ds,"tree");
   return ds;
  }
  //建树的基本思路是：从根节点开始递归调用显示子树 
 [color=#FF0000]        private void InitTree(TreeNodeCollection Nds,string parentId)[/color]  {
   DataView dv=new DataView();
   [color=#FF0000]TreeNode tmpNd;[/color]
   string intId;
   dv.Table=ds.Tables["tree"];
   dv.RowFilter="ParentId="" + parentId + """ ;
   foreach(DataRowView drv in dv)
   {
    tmpNd=new TreeNode();
    tmpNd.ID=drv["NodeId"].ToString();
    tmpNd.Text=drv["NodeName"].ToString();
    tmpNd.ImageUrl="../images/"+drv["Icon"].ToString();
    tmpNd.NavigateUrl="../"+drv["Address"].ToString();
    Nds.Add(tmpNd);
    intId=drv["ParentId"].ToString();
    InitTree(tmpNd.Nodes,tmpNd.ID);
   }
  }



  #region Web Form Designer generated code
  override protected void OnInit(EventArgs e)
  {
   InitializeComponent();
   base.OnInit(e);
  }
  private void InitializeComponent()
  {    
   this.Load += new System.EventHandler(this.Page_Load);



  }
  #endregion
 }
}

<asp:TreeView ID="tvMenu" runat="server">

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