实现无限递归操作（可用作盖楼）

看看效果

无限递归调用前台代码

代码

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ASP.NET 无限级分类示例</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    注意:本页面仅演示无限极分类（表格、下拉列表）的操作方法，具体功能请自行填充！
    </div>
       <table width="100%"    border='1' cellspacing="0" style="border-collapse: collapse;"  bgcolor="#ffffff" bordercolor="#cccccc">
                   <tr align="center" valign="middle">
                     <th height="22" colspan="88">分类管理 </th>
                   </tr>
                  <tr><td>添加根分类</td>
                  <td>
                                     <asp:TextBox runat="server" ID="txbroot"></asp:TextBox>
                   <asp:Button runat="server"  ID="btnroot" Text="确定添加" onclick="btnroot_Click" />

                  </td>
                  </tr>
                  <tr>
                  <td>添加子分类</td>
                  <td >
                  在
                  <asp:DropDownList runat="server" ID="ddllm"   ></asp:DropDownList>
                          下添加子分类

                   <asp:TextBox runat="server" ID="txbzifl"></asp:TextBox>
                   <asp:Button runat="server"  ID="btnziok" Text="确定添加" onclick="btnziok_Click" />

                   </td>
                  </tr>

                  <tr><td>名称</td><td>操作</td></tr>
                  <asp:Literal runat="server" ID="litlist"></asp:Literal>
      </table>
    </form>
</body>
</html>

cs 页面

代码

using System;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using FTchina;

public partial class _Default : System.Web.UI.Page
{


     protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            LoadList();
        }
    }

    /// <summary>
    /// 加载整个分类表
    /// </summary>
    private void LoadList()
    {
        litlist.Text = "";

        int MTcount = 0;//执行遍历的次数
        //开始迭代加载
        MakeTr("1", MTcount);

    }
    /// <summary>
    /// 装配每一行
    /// </summary>
    /// <param name="id">上级ID</param>
    /// <param name="count">迭代次数</param>
    private void MakeTr(string id, int count)
    {

        DataView dv = new DataView(shujuku.GetDataTable("select * from lanmu where parentid=" + id + " order by id asc"));
        foreach (DataRowView drv in dv)
        {
            //形成表格
            litlist.Text += "<tr><td>" + MakeFelgefu(count) + drv["context"].ToString() + "</td><td>自身编号" + drv["id"].ToString() + ",上级编号" + id + "</td></tr>";

            //形成下拉列表
            ListItem li = new ListItem(MakeFelgefu(count) + drv["context"].ToString(), drv["id"].ToString());
            ddllm.Items.Add(li);

            //再次遍历
            MakeTr(drv["id"].ToString(), count + 1);

        }

    }
    /// <summary>
    /// Make分隔符
    /// </summary>
    /// <param name="count"></param>
    /// <returns></returns>
    private string MakeFelgefu(int count)
    {
        string Returnwords = string.Empty;
        if (count == 0)
        {
            Returnwords = "";
        }

        else
        {
            Returnwords = ("├").PadLeft(count, '　');
        }
        return Returnwords;
    }



    protected void btnziok_Click(object sender, EventArgs e)
    {
        string parentid = ddllm.SelectedValue.ToString();
        string context = txbzifl.Text;
        string sql = "insert into lanmu (parentid,context) values(" + parentid + ",'" + context + "') ";
        shujuku.ExecuteSql(sql);
        LoadList();//更新列表

    }
    protected void btnroot_Click(object sender, EventArgs e)
    {
        string context =txbroot.Text;
        string sql = "insert into lanmu (parentid,context) values(1,'" + context + "') ";
       shujuku.ExecuteSql(sql);
       LoadList();//更新列表

    }
}

完整代码下载

posted on 2010-05-12 15:47 灯芯~~ 阅读(835) 评论(3) 收藏举报