asp.net树

来源：互联网发布：中通淘宝合作价格表编辑：程序博客网时间：2024/06/01 21:48

<%@ Page language="c#" Codebehind="Left.aspx.cs" AutoEventWireup="false" Inherits="www_manage_com.manage.website.Porducts.Left.Left" %>

<%@ Register TagPrefix="ie" Namespace="Microsoft.Web.UI.WebControls" Assembly="Microsoft.Web.UI.WebControls" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >

<HTML>

<HEAD>

</HEAD>

<TABLE id="Table1" height="100%" cellSpacing="0" borderColorDark="#ffffff" cellPadding="0"

width="170" borderColorLight="#999999" border="1" frame="vsides">

<TR>

<TR>

<TD>

<TR>

<TABLE id="Table4" height="60" cellSpacing="0" cellPadding="0" width="75" background="../../../images/set_icon/bg2.gif"

border="0">

<TR>

</TR>

</TABLE>

</TD>

</TR>

</TABLE>

<TABLE id="Table5" cellSpacing="0" borderColorDark="#ffffff" cellPadding="0" width="100%"

borderColorLight="#cccccc" border="0" frame="void">

<TR>

</TR>

<tr>

<td>

<ie:treeview id="TreeView1" runat="server" SystemImagesPath="../../../../webctrl_client/1_0/treeimages/"></ie:treeview>

</td>

</tr>

</table>

</TD>

</TR>

<TR>

</TR>

</TABLE>

</TD>

</TR>

<TR>

</TR>

</TABLE>

</TD>

</TR>

</TABLE>

</form>

</body>

</HTML>

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;

namespace www_manage_com.manage.website.Porducts.Left
{
/// <summary>
/// Left 的摘要说明。
/// </summary>
public class Left : System.Web.UI.Page
{
  protected Microsoft.Web.UI.WebControls.TreeView TreeView1;

  private void Page_Load(object sender, System.EventArgs e)
  {
   if(!Page.IsPostBack)
   {
    generateTreeView();
    //bind();
   }
   // 在此处放置用户代码以初始化页面
  }

  #region Web 窗体设计器生成的代码
  override protected void OnInit(EventArgs e)
  {
   //
   // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
   //
   InitializeComponent();
   base.OnInit(e);
  }

  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.Load += new System.EventHandler(this.Page_Load);

  }
  #endregion

  private void generateTreeView()
  {
   //根据“class_v1”表生成主目录
   string[] rootIds = getRootIds();

   TreeNode roodNode=new TreeNode();
   roodNode.Text="根目录";
   roodNode.NavigateUrl="class_list.aspx";
   roodNode.Target="main";
   roodNode.Expanded=true;

   foreach (string rootId in rootIds)
   {

    TreeNode rootNode1 = generateBaseTree(null, rootId);
    roodNode.Nodes.Add(rootNode1);

   }

TreeView1.Nodes.Add(roodNode);

  }

/// <summary>
/// 生成树形控件顺序1、先获得根目录（也就是大类）。
/// </summary>
/// <returns></returns>
  private string[] getRootIds()
  {
//   string sql = "SELECT id FROM class_v1 where parent_id = 0 order by sort desc,id desc";
   string sql = "SELECT id FROM class_v1 where parent_id = 0 order by sort asc";

DataSet ds=new DataSet();
SqlHelper.FillDataSet(ds,SqlHelper.GetCmd(sql));

   int iCount = ds.Tables[0].Rows.Count;
   string[] rootIds = new string[iCount];
   int i = 0;
   foreach (DataRow dtRow in ds.Tables[0].Rows)
   {
    rootIds[i] = dtRow["id"].ToString();
    i++;
   }

return rootIds;
}

  /// <summary>
  /// 把数据表 class_v1 中的数据生成目录树
  /// </summary>
  /// <param name="parentNode">父节点</param>
  /// <param name="categoryId">节点Id</param>
  /// <returns>生成新的目录树后的根节点</returns>
  private TreeNode generateBaseTree(TreeNode parentNode, string categoryId)
  {
   string sqlFormator = "SELECT id,ClassNameCn,parent_id FROM class_v1 where id = {0} Order by sort desc,id desc";
   string sql = string.Format(sqlFormator, categoryId);

   DataSet ds=new DataSet();

SqlHelper.FillDataSet(ds,SqlHelper.GetCmd(sql));

string categoryName = ds.Tables[0].Rows[0]["ClassNameCn"].ToString();

string url = "product_list.aspx?parent_id=" + categoryId;

   TreeNode newNode = new TreeNode();
   newNode.ID = categoryId;
   newNode.Text = categoryName;

newNode.NavigateUrl = url;
newNode.Target = "main";

if (parentNode != null)
parentNode.Nodes.Add(newNode);//在原有节点的基础上再加一个节点。

string sqlSubFormator = "SELECT id FROM class_v1 where parent_Id = {0} Order By sort desc,id desc";
string sqlSub = string.Format(sqlSubFormator, categoryId);

   DataSet dsSub=new DataSet();
   SqlHelper.FillDataSet(dsSub,SqlHelper.GetCmd(sqlSub));

   foreach (DataRow dtRow in dsSub.Tables[0].Rows)
   {
    generateBaseTree(newNode, dtRow[0].ToString());
   }

return newNode;
}

}
}
注意：需要将：webctrl_client下的所有内容考到项目中，然后引用一下.