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：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
<%@ 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> |
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
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} |
希望本文所述对大家C#程序设计有所帮助。
