ASP.NET 讀資料庫綁定到 TreeView 遞迴方式

最後更新：2018-12-07 來源：互聯網

上載者：User

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建立表及插入類比資料：

CREATE TABLE [sysMenuTree]([NoteId] [decimal](18, 0) NOT NULL,[ParentId] [decimal](18, 0) NULL,[sText] [nvarchar](50) NULL,[sValue] [nvarchar](50) NULL,[sURL] [nvarchar](50) NULL,[sTarget] [nvarchar](50) NULL,[Chger] [nvarchar](50) NULL,[ChgTime] [nvarchar](50) NULL）insert into sysMenuTree values(3,0,N'目錄',N'目錄','','','','')insert into sysMenuTree values(4,0,N'目錄',N'目錄','','','','')insert into sysMenuTree values(5,0,N'目錄',N'目錄','','','','')insert into sysMenuTree values(6,3,N'項目.1',N'項目.1','','','','')insert into sysMenuTree values(7,3,N'項目.2',N'項目.2','','','','')insert into sysMenuTree values(8,4,N'項目.1',N'項目.1','','','','')insert into sysMenuTree values(9,4,N'項目.2',N'項目.2','','','','')insert into sysMenuTree values(10,4,N'項目.3',N'項目.3','','','','')insert into sysMenuTree values(11,5,N'項目.1',N'項目.1','','','','')insert into sysMenuTree values(12,5,N'項目.2',N'項目.2','','','','')

在ASP.NET中讀取資料繫結到TreeView實現代碼：

<%@ 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></title></head><body>    <form id="form1" runat="server">    <div>        <asp:TreeView ID="treeMenu" runat="server">        </asp:TreeView>    </div>    </form></body></html>

using System;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;public partial class _Default : System.Web.UI.Page {    private readonly string ConnString = @"server=.\MSSQLSERVER2008;database=chart;uid=sa;pwd=123456";    private DataTable dt = null;    protected void Page_Load(object sender, EventArgs e)    {        if(!IsPostBack)        {            dt = new DataTable();            GetMenuToDataTable("select * from sysMenuTree",dt);            BindTree(dt,null,"0");        }    }    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["sText"].ToString();            node.Value = row["sValue"].ToString();            BindTree(dtSource,node,row["NoteId"].ToString());            if(parentNode ==  null)            {                treeMenu.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;    }}

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