如何通过Asp.Net实现无限分类生成表格？

来源：www.45fan.com 2016-09-25 17:29:11

本文实例讲述了Asp.Net实现无限分类生成表格的方法。分享给大家供大家参考，具体如下：

数据结构 monitor_group

monitor_grp_id monitor_grp_name parent_id level childCount orderby
[int,自动递增] [nvarchar,not null] [int,not null] [int,not null] [int,not null] [int ,null]
1 数据库服务器 0 1 2
2 应用服务器 0 1 2
3 系统服务器 0 1 0
4 WEB服务器 1 2 0
5 邮件服务器 1 2 0
6 代理服务器 2 2 0
7 Ftp服务器 2 2 0

\App_code\data.cs

using System;
using System.Data;
using MySql.Data.MySqlClient;
using System.Configuration;
using System.Linq;
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 System.Xml.Linq;
/// <summary>
///common 的摘要说明
/// </summary>
/// 
namespace yihan
{
 namespace Data
 {
  public class myDataBind
  {
   public myDataBind()
   {
    //
    //TODO: 在此处添加构造函数逻辑
    //
   }
   public static string GetTree_monitor_grp_id(DataTable dt, int parent_id, ref string returnString)
   {
    //绑定目录树
    //dt:DataTable对象;parent_id:父ID;returnString:输出引用变量;
    DataRow[] dr = dt.Select("parent_id=" + parent_id);
    int currentLenght = 0;   //当前次数
    foreach (DataRow row in dr)
    {
     string nodeImg = "";  //节点图片
     string treeLineImg = ""; //树线
     currentLenght += 1;
     if (Convert.ToInt32(row["childCount"]) > 0)
     {nodeImg = "<img src='images/treeExpand.gif' align='absmiddle'>";}
     else
     {nodeImg = "<img src='images/treeNode.gif' align='absmiddle'>";}
     for (var i = 1; i <= Convert.ToInt32(row["level"]); i++)
     {
      //计算treeLineImg
      if (i == Convert.ToInt32(row["level"]))
      {
       if (currentLenght == dr.Length)  //判断当前次数是否与本次dr总数量相等
       { treeLineImg += "└ "; }
       else 
       { treeLineImg += "├ "; }
      }
      else
      {
       treeLineImg += "│ ";
      }
     }
     returnString += "<tr>\n";
     returnString += "<td align='left'>" + treeLineImg + nodeImg + " " + row["monitor_grp_name"] + "</td>\n";
     returnString += "<td align='center'>" + row["level"] + "</td>\n";
     returnString += "<td align='center'>" + row["childCount"] + "</td>\n";
     returnString += "<td align='center'>";
     returnString += "<a href='class_add.aspx?monitor_grp_id=" + row["monitor_grp_id"] + "'>添加子类</a> ";
     returnString += "<a href='class_modi.aspx?monitor_grp_id=" + row["monitor_grp_id"] + "'>修改</a> ";
     returnString += "<a href='class_del.aspx?monitor_grp_id=" + row["monitor_grp_id"] + "' onclick=\"javascript:{if(!confirm('确删要删除该类及其子类吗?'))return false;}\">删除</a> ";
     returnString += "</td>\n";
     returnString += "</tr>\n";
     GetTree_monitor_grp_id(dt, Convert.ToInt32(row["monitor_grp_id"]), ref returnString);
    }
    return returnString;
   }//GetCatalogTree End
   }//myDataBind End
  }
}

class_list.aspx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
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 System.Xml.Linq;
using yihan.Data;
public partial class monitor_monitor_group_class_list : System.Web.UI.Page
{
 protected void Page_Load(object sender, EventArgs e)
 {
  if (!IsPostBack)
  {
   DataTable dt = new DataTable();
   string resultString = "";
   string sql = "select * from monitor_group order by orderby desc,monitor_grp_id";
   DbConn conn = new DbConn();
   dt = conn.DataTable(sql);
   Literal1.Text = myDataBind.GetTree_monitor_grp_id(dt, 0, ref resultString); //调用
   dt.Dispose();
   conn.Close();
  }
 }
}

class_list.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="class_list.aspx.cs" Inherits="monitor_monitor_group_class_list" %>
<body> 
 <form id="form1" runat="server">
 <table class="conBox" width="100%" border="0" cellpadding="0" cellspacing="1" bgcolor="#66AADD">
  <tr align="center" bgcolor="#999999">
  <th width="36%" bgcolor="#BAD8EF">监视器组名称</th>
  <th width="9%" bgcolor="#BAD8EF">级别</th>
  <th width="15%" bgcolor="#BAD8EF">子节点总数</th>
  <th width="29%" bgcolor="#BAD8EF">操作</th>
  </tr>
  <tr>
  <td colspan="5" style="padding-left:6px;background:#DBDBDB;">监视器组</td>
  </tr>
  <asp:Literal ID="Literal1" runat="server"></asp:Literal>
 </table>
 </form>
</body>

手写Table

string s="<table>"
s+="<tr><td>";
s+=变量值;
s+="</td></tr></table>";
ResPonse.Write(s);

至于循环及其其他的方法自己构造

希望本文所述对大家asp.net程序设计有所帮助。

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如何通过Asp.Net实现无限分类生成表格？

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