c# asp.net 树形结构源码？

<%@ 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 id="Head1" runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TreeView ID="TreeView1" runat="server" Height="257px" ImageSet="WindowsHelp"
            Width="142px">
            <ParentNodeStyle Font-Bold="False" />
            <HoverNodeStyle Font-Underline="True" ForeColor="#6666AA" />
            <SelectedNodeStyle BackColor="#B5B5B5" Font-Underline="False" HorizontalPadding="0px"
                VerticalPadding="0px" />
            <NodeStyle Font-Names="Tahoma" Font-Size="8pt" ForeColor="Black" HorizontalPadding="5px"
                NodeSpacing="0px" VerticalPadding="1px" />
        </asp:TreeView>
    </div>
    </form>
</body>
</html>using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class _Default : System.Web.UI.Page
{
    DataView dv;
    DataTable dt;    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            //数据库执行查询的方法就不写了。
            Operator op = new Operator();
            //这里执行的是：select * from tabmenu
            dt = op.Query();
            //第一次加载时调用方法传参
            CreateTree(0, null, dt, this.TreeView1);
            this.TreeView1.ExpandAll();
        }
    }    /// <summary>
    /// 创建一个树
    /// </summary>
    /// <param name="parentID">父ID</param>
    /// <param name="node">节点</param>
    /// <param name="dt">DataTable</param>
    /// <param name="treeView">TreeView的名称</param>
    public void CreateTree(int parentID, TreeNode node, DataTable dt, TreeView treeView)
    {
        //实例化一个DataView dt = 传入的DataTable
        dv = new DataView(dt);
        //筛选(相当于select * from tabMenu where menuParentID = 传入的 parentID)
        dv.RowFilter = "[menuParentID]=" + parentID;
        //用foreach遍历dv
        foreach (DataRowView row in dv)
        {
            //第一次加载时为空
            if (node == null)
            {
                //创建根节点
                TreeNode root = new TreeNode();
                //必须与数据库的对应
                root.Text = row["menuName"].ToString();
                root.Value = row["menuID"].ToString();
                //添加根节点
                this.TreeView1.Nodes.Add(root);
                //递归调用方法本身
                CreateTree(int.Parse(row["menuID"].ToString()), root, dt, treeView);
            }
            else
            {
                //添加子节点
                TreeNode childNode = new TreeNode();
                childNode.Text = row["menuName"].ToString();
                childNode.Value = row["menuID"].ToString();
                node.ChildNodes.Add(childNode);
                CreateTree(int.Parse(row["menuID"].ToString()), childNode, dt, treeView);
            }
        }    }
}
数据库创建
create table tabMenu
(
   menuID int identity(1,1) primary key,--自动编号
   menuParentID int not null,--上级菜单的编号
   menuName varchar(20) not null,--菜单名称
   menuUrl varchar(20) not null,--菜单地址
   menuImage varchar(20) not null, --图片地址
   menuTarget varchar(20) not null,--打开方式
)
go
--0表示根节点
insert into tabMenu
values(0,'xx后台管理','','','')

--1子节点
insert into tabMenu
values(1,'学生管理','','','')

insert into tabMenu
values(1,'班级管理','','','')
--2级节点
insert into tabMenu
values(2,'S1','','','')

insert into tabMenu
values(2,'S2','','','')

insert into tabMenu
values(2,'s3','','','')
--3级节点

insert into tabMenu
values(3,'S1','','','')

insert into tabMenu
values(3,'S2','','','')

insert into tabMenu
values(3,'s3','','','')

insert into tabMenu
values(4,'Ccc','','','')

insert into tabMenu
values(5,'bbb,'','','')

insert into tabMenu
values(6,'fff','','','')
--
insert into tabMenu
values(7,'stu1','','','')

insert into tabMenu
values(8,'stu2','','','')

insert into tabMenu
values(9,'stu1','','','')
select * from tabMenu
go

调试易

c# asp.net 树形结构源码？

解决方案 »