ASP.NET - 多级分类

表结构：

 

表数据：

 

最终效果：

 

前端代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Test.aspx.cs" Inherits="APManage.Test" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>


        <asp:TreeView ID="TreeView1" runat="server">
        </asp:TreeView>


    </div>
    </form>
</body>
</html>

 

后端代码：

using System;
using System.Data;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

namespace APManage
{
    public partial class Test : System.Web.UI.Page
    {

        private readonly string ConnString = @"server = HUANGFU-PC; database = DB_APManage; integrated security = true";
        private DataTable dt = null;

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                dt = new DataTable();
                GetMenuToDataTable("select * from Tb_APCategory", dt);
                BindTree(dt, null, "1000");
            }
        }

        private void BindTree(DataTable dtSource, TreeNode parentNode, string parentID)
        {
            DataRow[] rows = dtSource.Select(string.Format("ParentID={0}", parentID));
            foreach (DataRow row in rows)
            {
                TreeNode node = new TreeNode();
                node.Text = row["CategoryName"].ToString();
                node.Value = row["ParentID"].ToString();
                BindTree(dtSource, node, row["ID"].ToString());
                if (parentNode == null)
                {
                    this.TreeView1.Nodes.Add(node);
                }
                else
                {
                    parentNode.ChildNodes.Add(node);
                }
            }
        }

        private DataTable GetMenuToDataTable(string query, DataTable dt)
        {
            using (SqlConnection conn = new SqlConnection(ConnString))
            {
                SqlCommand cmd = new SqlCommand(query, conn);
                SqlDataAdapter ada = new SqlDataAdapter(cmd);
                ada.Fill(dt);
            }
            return dt;
        }
    }
}

 

posted on 2015-09-08 17:05  ultrastrong  阅读(956)  评论(0)  编辑  收藏  举报