TreeView树形控件递归绑定数据库里的数据。
第一步：数据库中查出来的表，字段名分别为UNAME(显示名称)，DID(关联数据)，UTYPE(类型)
第二步：前台代码
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="tree.aspx.cs" Inherits="Maticsoft.Web.tree" %>
2
3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5 <html xmlns="http://www.w3.org/1999/xhtml">
6 <head runat="server">
7 <title></title>
8 <script type="text/javascript">
9 function show(msg) {
10 alert(msg);
11 }
12 </script>
13
14 </head>
15 <body>
16
17 <form id="form1" runat="server">
18 <div>
19 <asp:TreeView ID="treeT" runat="server">
20 </asp:TreeView>
21
22
23 </div>
24 </form>
25 </body>
26 </html>
第三步：后台代码
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7 using System.Data;
8 using System.Data.SqlClient;
9
10 namespace Maticsoft.Web
11 {
12 public partial class tree : System.Web.UI.Page
13 {
14 Maticsoft.BLL.G_USERS bll = new BLL.G_USERS();
15 Maticsoft.Model.G_USERS model = new Model.G_USERS();
16
17 protected void Page_Load(object sender, EventArgs e)
18 {
19 //根节点的条件
20 BindTree("8");
21 }
22
23 #region 绑定父节点(第一级)
24 private void BindTree(string pid)
25 {
26
27 DataSet ds = bll.GetList("a.status > -1 and utype=" + pid);
28 if (ds.Tables[0].Rows.Count > 0)
29 {
30 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
31 {
32 TreeNode node = new TreeNode();
33 node.Text = ds.Tables[0].Rows[i]["uName"].ToString();
34 node.Target = ds.Tables[0].Rows[i]["dID"].ToString();
35 this.treeT.Nodes.Add(node);
36 BindNode(node);
37 }
38 }
39 }
40 #endregion
41
42 #region 绑定子节点
43
44 #endregion
45 private void BindNode(TreeNode nd)
46 {
47 DataSet ds = bll.GetList("a.status>-1 and a.id=b.user_id and b.fid=" + Convert.ToString(nd.Target) + " order by b.shorder asc ");
48 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
49 {
50 TreeNode node = new TreeNode();
51 node.Text = ds.Tables[0].Rows[i]["uName"].ToString();
52 node.Target = ds.Tables[0].Rows[i]["dID"].ToString();
53 nd.ChildNodes.Add(node);
54
55 //判断是否到最底层节点
56 if (ds.Tables[0].Rows[i]["utype"].ToString() != "0")
57 {
58 BindNode(node);
59 }
60 }
61 }
62
63
64
65
66 }
67 }
效果功能图：
另一种一步到位：(数据太大会超时)
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7 using System.Data;
8 using System.Data.SqlClient;
9
10 namespace tree
11 {
12 public partial class tree : System.Web.UI.Page
13 {
14 protected void Page_Load(object sender, EventArgs e)
15 {
16 BindTree("8");
17 }
18 #region 绑定父节点(第一级)
19 private void BindTree(string pid)
20 {
21 DataSet ds = GetData(pid);
22 if (ds.Tables[0].Rows.Count > 0)
23 {
24 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
25 {
26 TreeNode node = new TreeNode();
27 node.Text = ds.Tables[0].Rows[i]["UName"].ToString();
28 node.Target = ds.Tables[0].Rows[i]["DID"].ToString();
29 this.TreeView1.Nodes.Add(node);
30 BindNode(node);
31 }
32 }
33 }
34 #endregion
35
36 #region 绑定子节点
37 private void BindNode(TreeNode nd)
38 {
39 DataSet ds = GetData(Convert.ToString(nd.Target));
40 for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
41 {
42 TreeNode node = new TreeNode();
43 node.Text = ds.Tables[0].Rows[i]["UName"].ToString();
44 node.Target = ds.Tables[0].Rows[i]["DID"].ToString();
45 nd.ChildNodes.Add(node);
46 if (ds.Tables[0].Rows[i]["utype"].ToString() != "0")
47 {
48 BindNode(node);
49 }
50 }
51 }
52 #endregion
53
54 #region 将父级下的子级查询出来,并返回一张虚拟表
55 private DataSet GetData(string pid)
56 {
57 string connstr = "server=192.168.1.74;database=dsoa;uid=dsoa;pwd=dreamsoft;";
58 SqlConnection con = new SqlConnection(connstr);
59 con.Open();
60 string sqlstr =string.Empty;
61 if (pid == "8")
62 {
63 sqlstr = "select a.uname, b.id did, utype from g_users A left join G_DEPT B on a.id=b.user_id where a.status>-1 and utype =" + pid;
64 }
65 else
66 {
67 sqlstr = "select a.uname,b.id did, utype from g_users A,G_DEPT B where a.status>-1 and a.id=b.user_id and b.fid=" + pid + " order by b.shorder asc ";
68 }
69 SqlDataAdapter da = new SqlDataAdapter(sqlstr,con);
70 DataSet ds = new DataSet();
71 da.Fill(ds);
72 return ds;
73 }
74 #endregion
75
76 }
77 }
时间： 2024-08-10 09:23:25