C#递归方法实现无限级分类显示效果实例
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2023-11-21 23:17:46
本文实例讲述了c#递归方法实现无限级分类显示效果。分享给大家供大家参考,具体如下:
运行效果如下图所示:
具体代码如下:
<%@ page lang...
本文实例讲述了c#递归方法实现无限级分类显示效果。分享给大家供大家参考,具体如下:
运行效果如下图所示:
具体代码如下:
<%@ page language="c#" autoeventwireup="true" codefile="roledemo20150305.aspx.cs" inherits="roledemo20150305" %> <!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>c#无限级分类递归显示示例</title> <style type="text/css"> span { float:left; clear:both;} </style> <script src="js/jquery-1.9.1.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $("span").eq(0).show(); $("span").each(function (i) { var curr = $(this).attr("data-id"); $(this).click(function () { $("span").each(function (i) { var father = $(this).attr("data-father"); if (father == curr) { $(this).show(); } }); }); }); }); </script> </head> <body> <form id="form1" runat="server"> <div> <asp:gridview id="gridview1" runat="server"> </asp:gridview> <br/><br/><br/><br/> <asp:literal id="lt1" runat="server"></asp:literal> </div> </form> </body> </html>
using system; using system.collections.generic; using system.linq; using system.web; using system.text; using system.data; using system.web.ui; using system.web.ui.webcontrols; public partial class roledemo20150305 : system.web.ui.page { protected void page_load(object sender, eventargs e) { datatable dt = createdt(); datatable dtfinal = dt.clone(); list<string> list = new list<string>(); string userstr = getuserdata(); if (userstr.contains(",")) { string[] strs = userstr.split(','); for (int i = 0; i < strs.length; i++) { list.add(strs[i]); } } else { list.add(userstr); } for (int i = 0; i < list.count; i++) { string module_id = list[i]; datarow[] drsource = dt.select(" module_id = '" + module_id + "'"); //最终dt是否存在该数据 datarow[] drexist = dtfinal.select(" module_id = '" + module_id + "'"); //最终dt是否存在该数据 if (drexist.length == 0) { dtfinal.rows.add(drsource[0]["module_id"], getpretag(drsource[0]["module_level"]) + drsource[0]["module_name"], drsource[0]["module_fatherid"], drsource[0]["module_url"], drsource[0]["module_order"], drsource[0]["module_level"]); //添加记录 } findfatherfromdt(dt, drsource, dtfinal); } //显示方式一 dataview dv = dtfinal.defaultview; dv.sort = "module_id asc"; datatable dtneed = dv.totable(); gridview1.datasource = dtneed; gridview1.databind(); //显示方式二 stringbuilder builder = new stringbuilder(); for (int i = 0; i < dtneed.rows.count; i++) { datarow dr = dtneed.rows[i]; builder.appendline("<span data-id='" + dr["module_id"] + "' data-father='" + dr["module_fatherid"] + "' style='display:none'>" + dr["module_name"] + "</span>"); } lt1.text = builder.tostring(); } /// <summary> /// 继续追溯添加父类记录 /// </summary> /// <param name="dt"></param> /// <param name="dtfinal"></param> protected void findfatherfromdt(datatable dt, datarow[] drfather, datatable dtfinal) { datarow[] drfatherup = dt.select(" module_id = '" + drfather[0]["module_fatherid"] + "'"); datarow[] drfatherupexist = dtfinal.select(" module_id = '" + drfather[0]["module_fatherid"] + "'"); if (drfatherup.length > 0 && drfatherupexist.length == 0) //该记录存在父类且父类未添加到最终dt { dtfinal.rows.add(drfatherup[0]["module_id"], getpretag(drfatherup[0]["module_level"]) + drfatherup[0]["module_name"], drfatherup[0]["module_fatherid"], drfatherup[0]["module_url"], drfatherup[0]["module_order"], drfatherup[0]["module_level"]); //继续追溯添加父类记录 findfatherfromdt(dt, drfatherup, dtfinal); } } #region 添加前缀 protected string getpretag(object num) { string pre = string.empty; int i = convert.toint32(num); if (i < 2) { } else if (i == 2) { pre += "└"; } else { pre += "└"; for (int j = 0; j < i - 2; j++) { pre += "─"; } } return pre; } #endregion #region 用户测试数据 protected static string getuserdata() { datatable dt = new datatable(); dt.columns.add("userid"); dt.columns.add("usermoduleoption"); dt.rows.add("张三", "m01010305,m010205,m0101030301"); return dt.rows[0]["usermoduleoption"].tostring(); } #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.columns.add("module_level"); dt.rows.add("c1", "全国", "0", "", "1", "1"); dt.rows.add("m01", "广东", "c1", "", "1", "2"); //深圳 dt.rows.add("m0101", "深圳", "m01", "3.aspx", "100", "3"); dt.rows.add("m010101", "南山区", "m0101", "4.aspx", "1000", "4"); dt.rows.add("m010102", "罗湖区", "m0101", "", "1001", "4"); dt.rows.add("m010103", "福田区", "m0101", "", "1002", "4"); dt.rows.add("m010104", "宝安区", "m0101", "", "1003", "4"); dt.rows.add("m010105", "龙岗区", "m0101", "", "1004", "4"); //深圳 - 福田区 dt.rows.add("m01010301", "上梅林", "m010103", "", "1002001", "5"); dt.rows.add("m01010302", "下梅林", "m010103", "", "1002002", "5"); dt.rows.add("m01010303", "车公庙", "m010103", "", "1002003", "5"); dt.rows.add("m01010304", "竹子林", "m010103", "", "1002004", "5"); dt.rows.add("m01010305", "八卦岭", "m010103", "", "1002005", "5"); dt.rows.add("m01010306", "华强北", "m010103", "", "1002006", "5"); //深圳 - 福田区 - 车公庙 dt.rows.add("m0101030301", "天安数码城", "m01010303", "", "100200301", "6"); //广州 dt.rows.add("m0102", "广州", "m01", "", "101", "3"); dt.rows.add("m010201", "越秀区", "m0102", "", "1105", "4"); dt.rows.add("m010202", "海珠区", "m0102", "", "1106", "4"); dt.rows.add("m010203", "天河区", "m0102", "", "1107", "4"); dt.rows.add("m010204", "白云区", "m0102", "", "1108", "4"); dt.rows.add("m010205", "黄埔区", "m0102", "", "1109", "4"); dt.rows.add("m010206", "荔湾区", "m0102", "", "1110", "4"); dt.rows.add("m010207", "罗岗区", "m0102", "", "1111", "4"); dt.rows.add("m010208", "南沙区", "m0102", "", "1112", "4"); return dt; } #endregion }
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