• 无限级递归生成HTML示例及ListBox,DropDownList等无限树

    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="htmlTree.aspx.cs" Inherits="htmlTree" %>

<!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>HTML无限层级目录树</title>
    <style type="text/css">
    /* table css */
    .tableCss 
    {
        100%;
	    border-collapse:collapse;
	    font-size:12px;
	    border:1px solid #d8d5d5;
	    color: #333;
	    margin-top:12px;
    }
    .tableCss p{ padding-bottom:10px;}
    .tableCss th 
    {
        background-color:#5D7B9D;
        color:#ffffff;
        text-align:center;
        line-height:20px;
        border-collapse:collapse;
    }
    .tableCss td
    {
        padding:5px;
        border: 1px solid #D4D0C8;
        border-collapse:collapse;
    }
    .tableCss .tdHead
    {
        border-collapse:collapse;
        text-align: left;
        background-color:#E0ECFF;
    }
    .tableCss input[type="text"]{
     border:1px solid #d8d5d5;color:#272727; height:18px; padding-top:2px;
    }
    .tableCss input[type="password"]{
     border:1px solid #d8d5d5; color:#272727; height:18px; padding-top:2px;
    }
    .tableCss .inputBtn{border: 1px solid #6883AA; background-color:#748FB4; vertical-align: bottom;padding:3px 8px 3px 8px; color:#fff; cursor:pointer;}
    .tableCss input[type="radio"]{border:0px; font-size:12px; color:#272727;}
    .tableCss textarea{color: #272727; border:1px solid #d8d5d5;}
    .inputBtn2{border: 1px solid #6883AA; background-color:#748FB4; vertical-align: bottom;padding:3px 8px 3px 8px; color:#fff; cursor:pointer;}
    /* table css */
    
    </style>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Literal ID="LiteralTree" runat="server"></asp:Literal>
    </div>
    </form>
</body>
</html>

    using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class htmlTree : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            LiteralTree.Text = showtree();
        }
    }

    #region 显示权限树
    private int S_Isroot;
    private string NS_Name;
    private string NS_Id;
    private string trees;
    private StringBuilder BuilderBody = new StringBuilder();
    private DataTable dt = createDT();
    public string showtree()
    {
        StringBuilder Builder = new StringBuilder();
        Builder.AppendLine("<table id='tableAction' class='tableCss'>");
        Builder.AppendLine("<th>功能</th><th>父类编码</th><th>操作编码</th><th></th>");
        showtreeforline(dt, "0", "");
        Builder.Append(BuilderBody);
        Builder.AppendLine("</table>");
        return Builder.ToString();
    }
    #endregion

    #region 递归显示树
    public void showtreeforline(DataTable dt, string moduleid, string tree)
    {
        bool ParentBool = true; //是否父节点
        if (tree.Length == 0 || tree == "" || tree == String.Empty) S_Isroot = 0;
        trees = "1";
        string treestr = tree + trees;
        DataRow[] dr = dt.Select("module_fatherid='" + moduleid + "'");

        for (int i = 0; i < dr.Length; i++)
        {
            NS_Name = dr[i]["module_name"].ToString();
            NS_Id = dr[i]["module_id"].ToString();
            string Ns_Parentid = dr[i]["module_fatherid"].ToString();

            if (i + 2 > dr.Length)
            {
                trees = "0";
                treestr = tree + trees;
            }
            BuilderBody.AppendLine("	 <tr class='tdbg' >");
            //BuilderBody.AppendLine("<td vAlign=bottom width='5%' align='center'>" + NS_Id + "</td> ");
            BuilderBody.AppendLine("<td valign='bottom' width='40%'>");

            #region 输出层级关系
            for (int k = 0; k < treestr.Length - 1; k++)
            {
                if (treestr.Substring(k, 1) == "1")
                {
                    BuilderBody.AppendLine("    ");
                }
                else
                {
                    BuilderBody.AppendLine("    ");
                }
            }
            #endregion

            #region 判断是否无下级节点
            DataRow[] dr1 = dt.Select("module_fatherid='" + NS_Id + "'");
            if (dr1.Length == 0) //无下级，即末级节点
            {
                ParentBool = false;
            }
            else
            {
                ParentBool = true;
            }
            #endregion

            #region 输出树型图片
            if (trees == "0")
            {
                if ((tree == "" || tree == String.Empty || tree == null) && S_Isroot == 0)
                {
                    BuilderBody.AppendLine("    ");
                }
                else
                {

                    BuilderBody.AppendLine("└");
                }
            }
            else if (tree == "" || tree == String.Empty || tree == null)
            {
                if (S_Isroot == 1)
                {
                    BuilderBody.AppendLine("├");
                }
                else
                {
                    BuilderBody.AppendLine("┌");
                }
            }
            else
            {
                BuilderBody.AppendLine("├ ");
            }
            #endregion

            BuilderBody.AppendLine(NS_Name);
            BuilderBody.AppendLine("</td>");
            BuilderBody.AppendLine("<td width='10%'>");
            BuilderBody.AppendLine(Ns_Parentid);
            BuilderBody.AppendLine("</td>");

            if (ParentBool == false)
            {
                BuilderBody.AppendLine("<td width='40%'>");
                //查询该功能的所有操作
                DataRow[] dtAction = dt.Select(" module_id='" + NS_Id + "' ");
                if (dtAction .Length> 0)
                {
                    for (int j = 0; j < dtAction.Length; j++)
                    {
                        BuilderBody.AppendLine("<input type='checkbox' name='actionItem' style='vertical-align:middle' value='" + dtAction[j]["module_id"] + "' />");
                        BuilderBody.AppendLine(dtAction[j]["module_name"].ToString() + " " + dtAction[j]["module_id"] + " ");
                    }
                }
                BuilderBody.AppendLine("</td>");
                BuilderBody.AppendLine("<td width='10%'>");
                BuilderBody.AppendLine(" <a href='javascript:showMyModalDialog(\"ModuleActionAdd.aspx?ModuleID=" + NS_Id + "&cmd=add\",\"600\",\"300\");'>新增操作</a> ");
                BuilderBody.AppendLine("</td>");
            }
            else
            {
                BuilderBody.AppendLine("<td width='40%'>");
                BuilderBody.AppendLine("</td>");
                BuilderBody.AppendLine("<td width='10%'>");
                BuilderBody.AppendLine("</td>");
            }

            BuilderBody.AppendLine("</tr>");
            showtreeforline(dt, NS_Id, treestr);
            S_Isroot = 1;
        }
    }
    #endregion

    #region 创建数据
    protected static DataTable createDT()
    {
        DataTable dt = new DataTable();
        dt.Columns.Add("module_id");
        dt.Columns.Add("module_name");
        dt.Columns.Add("module_fatherid");
        dt.Columns.Add("module_url");
        dt.Columns.Add("module_order");

        dt.Rows.Add("C1", "全国", "0", "", "1");
        dt.Rows.Add("M01", "广东", "C1", "", "1");

        dt.Rows.Add("M0101", "深圳", "M01", "", "100");
        dt.Rows.Add("M010101", "南山区", "M0101", "", "1000");
        dt.Rows.Add("M010102", "罗湖区", "M0101", "", "1001");
        dt.Rows.Add("M010103", "福田区", "M0101", "", "1002");
        dt.Rows.Add("M010104", "宝安区", "M0101", "", "1003");
        dt.Rows.Add("M010105", "龙岗区", "M0101", "", "1004");

        dt.Rows.Add("M01010301", "上梅林", "M010103", "", "1002001");
        dt.Rows.Add("M01010302", "下梅林", "M010103", "", "1002002");
        dt.Rows.Add("M01010303", "车公庙", "M010103", "", "1002003");
        dt.Rows.Add("M01010304", "竹子林", "M010103", "", "1002004");
        dt.Rows.Add("M01010305", "八卦岭", "M010103", "", "1002005");
        dt.Rows.Add("M01010306", "华强北", "M010103", "", "1002006");

        dt.Rows.Add("M0102", "广州", "M01", "", "101");
        dt.Rows.Add("M010201", "越秀区", "M0102", "", "1105");
        dt.Rows.Add("M010202", "海珠区", "M0102", "", "1106");
        dt.Rows.Add("M010203", "天河区", "M0102", "", "1107");
        dt.Rows.Add("M010204", "白云区", "M0102", "", "1108");
        dt.Rows.Add("M010205", "黄埔区", "M0102", "", "1109");
        dt.Rows.Add("M010206", "荔湾区", "M0102", "", "1110");
        dt.Rows.Add("M010207", "罗岗区", "M0102", "", "1111");
        dt.Rows.Add("M010208", "南沙区", "M0102", "", "1112");
        return dt;
    }
    #endregion
}
            #region DropDownList无限递归显示层次关系
        /// <summary>
        /// 创建无限分级下拉列表框 
        /// </summary>
        /// <param name="ddlst">下拉控件</param>
        /// <param name="dt">源DataTable</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        public static void CreateLevelDropDown(DropDownList ddlst, DataTable dt, string text, string value, string parentid)
        {
            ArrayList allItems = new ArrayList();
            DataRow[] rows = dt.Select(parentid + "=0");
            foreach (DataRow row in rows)
                CreateLevelDropDownAssistant(dt, ref   allItems, row, string.Empty, text, value, parentid);
            ListItem[] items = new ListItem[allItems.Count];
            allItems.CopyTo(items);
            ddlst.Items.AddRange(items);
        }

        /// <summary>
        /// 递归绑定子节点
        /// </summary>
        /// <param name="dt">源DataTable</param>
        /// <param name="items">数组</param>
        /// <param name="parentRow">当前节点</param>
        /// <param name="curHeader">前缀</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        private static void CreateLevelDropDownAssistant(DataTable dt, ref   ArrayList items, DataRow parentRow, string curHeader, string text, string value, string parentid)
        {
            ListItem newItem = new ListItem(curHeader + Until.CutString(parentRow[text].ToString(), 18, true), parentRow[value].ToString());
            items.Add(newItem);
            DataRow[] rows = dt.Select(parentid + "=" + newItem.Value);
            for (int i = 0; i < rows.Length - 1; i++)
                CreateLevelDropDownAssistant(dt, ref   items, rows[i], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┣", text, value, parentid);

            if (rows.Length > 0)
                CreateLevelDropDownAssistant(dt, ref   items, rows[rows.Length - 1], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┗", text, value, parentid);
        }

        #endregion

        #region TreeView 无限递归显示层次关系目录树
        /// <summary>
        /// 创建无限分级目录树TreeView
        /// </summary>
        /// <param name="treeview">TreeView空间</param>
        /// <param name="dt">数据源DataTable</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        public static void CreateLevelTreeView(TreeView treeview, DataTable dt, string text, string value, string parentid)
        {
            DataView dv = dt.DefaultView;
            dv.RowFilter = parentid + "=0";
            foreach (DataRowView drv in dv)
            {
                TreeNode node = new TreeNode();
                node.Text = drv[text].ToString();
                node.Value = drv[value].ToString();
                node.Expanded = false;
                treeview.Nodes.Add(node);
                CreatTreeViewChildNode(dv, node, text, value, parentid);
            }
        }

        /// <summary>
        /// 递归绑定子节点
        /// </summary>
        /// <param name="dv">源DataView</param>
        /// <param name="parentNode">当前节点</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        private static void CreatTreeViewChildNode(DataView dv, TreeNode parentNode, string text, string value, string parentid)
        {
            dv.RowFilter = parentid + "=" + parentNode.Value;
            foreach (DataRowView row in dv)
            {
                TreeNode replyNode = new TreeNode();
                replyNode.Text = row[text].ToString();
                replyNode.Value = row[value].ToString();
                replyNode.Expanded = false;
                parentNode.ChildNodes.Add(replyNode);
                CreatTreeViewChildNode(dv, replyNode, text, value, parentid);
            }
        }

        /// <summary>
        /// 创建无限分级目录树TreeView
        /// </summary>
        /// <param name="treeview">TreeView空间</param>
        /// <param name="dt">数据源DataTable</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="url">url字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        public static void CreateLevelTreeView(TreeView treeview, DataTable dt, string text, string value, string url, string parentid)
        {
            DataView dv = dt.DefaultView;
            dv.RowFilter = parentid + "=0";
            foreach (DataRowView drv in dv)
            {
                TreeNode node = new TreeNode();
                node.Text = drv[text].ToString();
                node.Value = drv[value].ToString();
                node.NavigateUrl = drv[url].ToString();
                node.Expanded = false;
                treeview.Nodes.Add(node);
                CreatTreeViewChildNode(dv, node, text, value, url, parentid);
            }
        }

        /// <summary>
        /// 递归绑定子节点
        /// </summary>
        /// <param name="dv">源DataView</param>
        /// <param name="parentNode">当前节点</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="url">url字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        private static void CreatTreeViewChildNode(DataView dv, TreeNode parentNode, string text, string value, string url, string parentid)
        {
            dv.RowFilter = parentid + "=" + parentNode.Value;
            foreach (DataRowView row in dv)
            {
                TreeNode replyNode = new TreeNode();
                replyNode.Text = row[text].ToString();
                replyNode.Value = row[value].ToString();
                replyNode.NavigateUrl = row[url].ToString();
                replyNode.Expanded = false;
                parentNode.ChildNodes.Add(replyNode);
                CreatTreeViewChildNode(dv, replyNode, text, value, url, parentid);
            }
        }
        #endregion

        #region 创建无限分级ListBox
        /// <summary>
        /// 创建无限分级ListBox 
        /// </summary>
        /// <param name="ddlst">ListBox控件</param>
        /// <param name="dt">源DataTable</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        public static void CreateLevelListBox(ListBox ddlst, DataTable dt, string text, string value, string parentid)
        {
            ArrayList allItems = new ArrayList();
            DataRow[] rows = dt.Select(parentid + "=0");
            foreach (DataRow row in rows)
                CreateLevelListBoxAssistant(dt, ref   allItems, row, string.Empty, text, value, parentid);
            ListItem[] items = new ListItem[allItems.Count];
            allItems.CopyTo(items);
            ddlst.Items.AddRange(items);
        }

        /// <summary>
        /// 递归绑定子节点
        /// </summary>
        /// <param name="dt">源DataTable</param>
        /// <param name="items">数组</param>
        /// <param name="parentRow">当前节点</param>
        /// <param name="curHeader">前缀</param>
        /// <param name="text">text字段</param>
        /// <param name="value">value字段</param>
        /// <param name="parentid">深度字段 例如parentid</param>
        private static void CreateLevelListBoxAssistant(DataTable dt, ref   ArrayList items, DataRow parentRow, string curHeader, string text, string value, string parentid)
        {
            ListItem newItem = new ListItem(curHeader + Until.CutString(parentRow[text].ToString(), 18, true), parentRow[value].ToString());
            items.Add(newItem);
            DataRow[] rows = dt.Select(parentid + "=" + newItem.Value);
            for (int i = 0; i < rows.Length - 1; i++)
                CreateLevelListBoxAssistant(dt, ref   items, rows[i], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┣", text, value, parentid);

            if (rows.Length > 0)
                CreateLevelListBoxAssistant(dt, ref   items, rows[rows.Length - 1], curHeader.Replace("┣", "┃").Replace("┗", "┣") + "┗", text, value, parentid);
        }
        #endregion


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  • 原文地址：https://www.cnblogs.com/smartsmile/p/6234456.html
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