如何通过Asp.Net实现无限分类生成表格？
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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