动态载入树 (ASP+数据库)
- 中国WEB开发者网络 (http://www.webasp.net)
-- 技术教程 (http://www.webasp.net/article/)
--- 动态载入树 (ASP+数据库) (http://www.webasp.net/article/25/24458.htm)
-- 发布日期： 2005-05-24
ASP+ACCESS 在数据量达100万条记录下，载入速度仍然惊人....
// 网上转载. 忘了作者... : )
//********************** Index.asp ************************//
1
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>
2<%Option Explicit%>
3<html>
4<head>
5<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
6<title>tree</title>
7<link href="css/style.css" rel="stylesheet" type="text/css">
8<script language="JavaScript">
9<!--
10var d1,d2;
11
12function expand(id)
13{
14 var d=new Date();
15 d1=d.valueOf();
16
17 var s_id = eval("s" + id);
18 var dir_id = eval("dir" + id);
19 if(s_id.href != '')
20 {
21 //window.open(s_id.href);
22 //or
23 //top.frames['FrameName'].location.href = s_id.href;
24 }
25
26 switch(dir_id.open)
27 {
28 //改变"+","-"
29 case "true":
30 {
31 with(dir_id)
32 {
33 innerText = "+";
34 open = "false";
35 className = 'dirclose';
36 }
37 if(document.getElementById("t" + id))
38 {
39 eval("t"+id).style.display = 'none';
40 document.getElementById("load_" + id).style.display = 'none';
41 return;
42 }
43 else
44 {
45 document.getElementById("load_" + id).style.display = 'none';
46 }
47 break;
48 }
49 case "false":
50 {
51 with(dir_id)
52 {
53 innerText = "-";
54 open = "true";
55 className = 'diropen';
56 }
57
58 document.getElementById("load_" + id).style.display = '';
59
60 if(document.getElementById("t" + id))
61 {
62 eval("t" + id).style.display = '';
63 eval("load_" + id).style.display = 'none';
64 return;
65 }
66 else
67 {
68 document.frames['hifm'].location.replace("subtree.asp?id=" + id);
69 }
70 break;
71 }
72 default:dir_id.innerText = "."; dir_id.className = 'dirNode'; return;
73 }
74
75}
76
77function ArrToHtml(ArrNode,nodeid)
78{
79 //输出到页面
80 var node_html = '<table id="t' + nodeid + '" width="100%" border="0" style="position: relative; left: 18px;" cellspacing="0" cellpadding="0">';
81
82 var str,opened,cls
83 for (var i = 0; i < ArrNode.length; i++)
84 {
85 if (ArrNode[i].iChildren == 0)
86 {
87 str = '.';
88 opened = 'no';
89 cls = 'dirNode';
90 }
91 else
92 {
93 str = '+';
94 opened = 'false';
95 cls = 'dirclose';
96 }
97
98 node_html += '<tr><td id="node' + ArrNode[i].id + '" class="td_node" valign="top"><span class="' + cls + '" id="dir' + ArrNode[i].id + '" onclick="expand(' + ArrNode[i].id + ')" open="' + opened + '">' + str + '</span><span class="node" id="s' + ArrNode[i].id + '" onclick="expand(' + ArrNode[i].id + ')" title="' + ArrNode[i].Content + '" href="' + ArrNode[i].strLink + '">' + ArrNode[i].Content + '</span></td></tr>';
99
100 if (ArrNode[i].iChildren > 0)
101 {
102 node_html += '<tr id="load_' + ArrNode[i].id + '" style="display: none"><td class="td_node"><table border="0" cellspacing="0" cellpadding="0" style="position: relative; left: 18; top: 0px"><tr><td class="td_node"><span class="dirNode">.</span><span class="load">Loading
</span></td></tr></table></td></tr>';
103 }
104 }
105
106 node_html += '</table>';
107 if (document.getElementById("load_" + nodeid))
108 {
109 document.getElementById("load_" + nodeid).style.display = "none";
110 document.getElementById("node" + nodeid).innerHTML += node_html;
111 var d=new Date();
112 d2=d.valueOf();
113 message.innerHTML = "耗时："+(d2-d1)+"ms";
114 }
115}
116-->
117</script>
118</head>
119
120<body topmargin="0" leftmargin="0" scroll="yes">
121<%
122Dim conn,rs
123Dim s,open,cls
124On Error Resume Next
125Set conn = Server.CreateObject("ADODB.Connection")
126conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("Tree.mdb") & ";Persist Security Info=False"
127Set rs = Server.CreateObject("ADODB.Recordset")
128
129rs.Open "select *,(select count(*) from deeptree where parentid = T.id) as children from deeptree T where parentid=0 order by parentid",conn,1,3
130%>
131<div id="message" style="height: 20px" align="center"> </div>
132<div align="center">
133 <center>
134 <table border="0" width="100%" cellspacing="0" cellpadding="0" height="100%" bgcolor="#F2F2F2">
135 <tr>
136 <td width="260" valign="top" align="left">
137 <div id="treedir" style="overflow: auto; width: 30%; height: 100%;">
138 <table border="0" cellspacing="0" cellpadding="0" style="position: relative; left: 18px; top: 20px;" width="100%">
139 <%
140 Do While Not rs.EOF
141 If rs("children") = 0 Then
142 s = "."
143 open = "no"
144 cls = "dirNode"
145 Else
146 s = "+"
147 open = "false"
148 cls = "dirclose"
149 End If
150 %>
151 <tr>
152 <td id="node<% = rs("id")%>" class="td_node" valign="top"><span class="<% = cls %>" id="dir<% = rs("id") %>" onclick="expand(<%=rs("id")%>)" open="<% = open %>"><% = s %></span><span class="node" id="s<% = rs("id") %>" onclick="expand(<% = rs("id") %>)" title="<% = Trim(rs("content")) %>" href="<% = Trim(rs("link")) %>"><% = rs("content") %></span>
153 </td>
154 </tr>
155 <% If rs("children") > 0 Then%>
156 <tr id="load_<% = rs("id") %>" style="display: none">
157 <td class="td_node">
158 <table border="0" cellspacing="0" cellpadding="0" style="position:relative;left:18;top:0" width="100%">
159 <tr>
160 <td class="td_node"><span class="dirNode">.</span><span class="load">Loading</span>
161 </td>
162 </tr>
163 </table>
164 </td>
165 </tr>
166 <%End If%>
167 <%
168 rs.MoveNext
169 Loop
170 %>
171 </table>
172 </div>
173 </td>
174 </table>
175 </center>
176</div>
177<%
178Set rs = Nothing
179Set conn = Nothing
180%>
181<iframe id='hifm' width=0 height=0 style="display: none" height="100%" width="100%"></iframe>
182</body>
183</html>
<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%> 2
<%Option Explicit%> 3
<html> 4
<head> 5
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 6
<title>tree</title> 7
<link href="css/style.css" rel="stylesheet" type="text/css"> 8
<script language="JavaScript"> 9
<!-- 10
var d1,d2; 11
12
function expand(id) 13
{ 14
var d=new Date(); 15
d1=d.valueOf(); 16
17
var s_id = eval("s" + id); 18
var dir_id = eval("dir" + id); 19
if(s_id.href != '') 20
{ 21
//window.open(s_id.href); 22
//or 23
//top.frames['FrameName'].location.href = s_id.href; 24
} 25
26
switch(dir_id.open) 27
{ 28
//改变"+","-" 29
case "true": 30
{ 31
with(dir_id) 32
{ 33
innerText = "+"; 34
open = "false"; 35
className = 'dirclose'; 36
} 37
if(document.getElementById("t" + id)) 38
{ 39
eval("t"+id).style.display = 'none'; 40
document.getElementById("load_" + id).style.display = 'none'; 41
return; 42
} 43
else 44
{ 45
document.getElementById("load_" + id).style.display = 'none'; 46
} 47
break; 48
} 49
case "false": 50
{ 51
with(dir_id) 52
{ 53
innerText = "-"; 54
open = "true"; 55
className = 'diropen'; 56
} 57
58
document.getElementById("load_" + id).style.display = ''; 59
60
if(document.getElementById("t" + id)) 61
{ 62
eval("t" + id).style.display = ''; 63
eval("load_" + id).style.display = 'none'; 64
return; 65
} 66
else 67
{ 68
document.frames['hifm'].location.replace("subtree.asp?id=" + id); 69
} 70
break; 71
} 72
default:dir_id.innerText = "."; dir_id.className = 'dirNode'; return; 73
} 74
75
} 76
77
function ArrToHtml(ArrNode,nodeid) 78
{ 79
//输出到页面 80
var node_html = '<table id="t' + nodeid + '" width="100%" border="0" style="position: relative; left: 18px;" cellspacing="0" cellpadding="0">'; 81
82
var str,opened,cls 83
for (var i = 0; i < ArrNode.length; i++) 84
{ 85
if (ArrNode[i].iChildren == 0) 86
{ 87
str = '.'; 88
opened = 'no'; 89
cls = 'dirNode'; 90
} 91
else 92
{ 93
str = '+'; 94
opened = 'false'; 95
cls = 'dirclose'; 96
} 97
98
node_html += '<tr><td id="node' + ArrNode[i].id + '" class="td_node" valign="top"><span class="' + cls + '" id="dir' + ArrNode[i].id + '" onclick="expand(' + ArrNode[i].id + ')" open="' + opened + '">' + str + '</span><span class="node" id="s' + ArrNode[i].id + '" onclick="expand(' + ArrNode[i].id + ')" title="' + ArrNode[i].Content + '" href="' + ArrNode[i].strLink + '">' + ArrNode[i].Content + '</span></td></tr>'; 99
100
if (ArrNode[i].iChildren > 0) 101
{ 102
node_html += '<tr id="load_' + ArrNode[i].id + '" style="display: none"><td class="td_node"><table border="0" cellspacing="0" cellpadding="0" style="position: relative; left: 18; top: 0px"><tr><td class="td_node"><span class="dirNode">.</span><span class="load">Loading</span></td></tr></table></td></tr>'; 103
} 104
} 105
106
node_html += '</table>'; 107
if (document.getElementById("load_" + nodeid)) 108
{ 109
document.getElementById("load_" + nodeid).style.display = "none"; 110
document.getElementById("node" + nodeid).innerHTML += node_html; 111
var d=new Date(); 112
d2=d.valueOf(); 113
message.innerHTML = "耗时："+(d2-d1)+"ms"; 114
} 115
} 116
--> 117
</script> 118
</head> 119
120
<body topmargin="0" leftmargin="0" scroll="yes"> 121
<% 122
Dim conn,rs 123
Dim s,open,cls 124
On Error Resume Next 125
Set conn = Server.CreateObject("ADODB.Connection") 126
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("Tree.mdb") & ";Persist Security Info=False" 127
Set rs = Server.CreateObject("ADODB.Recordset") 128
129
rs.Open "select *,(select count(*) from deeptree where parentid = T.id) as children from deeptree T where parentid=0 order by parentid",conn,1,3 130
%> 131
<div id="message" style="height: 20px" align="center"> </div> 132
<div align="center"> 133
<center> 134
<table border="0" width="100%" cellspacing="0" cellpadding="0" height="100%" bgcolor="#F2F2F2"> 135
<tr> 136
<td width="260" valign="top" align="left"> 137
<div id="treedir" style="overflow: auto; width: 30%; height: 100%;"> 138
<table border="0" cellspacing="0" cellpadding="0" style="position: relative; left: 18px; top: 20px;" width="100%"> 139
<% 140
Do While Not rs.EOF 141
If rs("children") = 0 Then 142
s = "." 143
open = "no" 144
cls = "dirNode" 145
Else 146
s = "+" 147
open = "false" 148
cls = "dirclose" 149
End If 150
%> 151
<tr> 152
<td id="node<% = rs("id")%>" class="td_node" valign="top"><span class="<% = cls %>" id="dir<% = rs("id") %>" onclick="expand(<%=rs("id")%>)" open="<% = open %>"><% = s %></span><span class="node" id="s<% = rs("id") %>" onclick="expand(<% = rs("id") %>)" title="<% = Trim(rs("content")) %>" href="<% = Trim(rs("link")) %>"><% = rs("content") %></span> 153
</td> 154
</tr> 155
<% If rs("children") > 0 Then%> 156
<tr id="load_<% = rs("id") %>" style="display: none"> 157
<td class="td_node"> 158
<table border="0" cellspacing="0" cellpadding="0" style="position:relative;left:18;top:0" width="100%"> 159
<tr> 160
<td class="td_node"><span class="dirNode">.</span><span class="load">Loading</span> 161
</td> 162
</tr> 163
</table> 164
</td> 165
</tr> 166
<%End If%> 167
<% 168
rs.MoveNext 169
Loop 170
%> 171
</table> 172
</div> 173
</td> 174
</table> 175
</center> 176
</div> 177
<% 178
Set rs = Nothing 179
Set conn = Nothing 180
%> 181
<iframe id='hifm' width=0 height=0 style="display: none" height="100%" width="100%"></iframe> 182
</body> 183
</html> ///****************** SubTree.asp *********************//
1<%Option Explicit%>
2<script language="JavaScript">
3function NodeClass(id,Content,strLink,iChildren)
4{
5 //this.id=parseInt(id);
6 this.id=id;
7 this.Content=Content;
8 this.strLink=strLink;
9 this.iChildren=iChildren;
10 //this.iChildren=parseInt(iChildren);
11}
12
13var ArrNode = new Array();
14<%
15Dim conn,rs,s,cls,href,Open
16Dim nodeid,i
17nodeid = Request.QueryString("id")
18'On Error Resume Next
19Set conn = Server.CreateObject("ADODB.Connection")
20conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("tree.mdb") & ";Persist Security Info=False"
21Set rs = Server.CreateObject("ADODB.Recordset")
22rs.Open "select *,(select count(*) from deeptree where parentid = T.id) as children from deeptree T where parentid=" & nodeid & "",conn,1,3
23i=0
24Do While Not rs.EOF
25 %>
26 ArrNode[<%=i%>] = new NodeClass(<%=rs("id")%>,'<%=trim(rs("content"))%>','<%=trim(rs("link"))%>',<%=rs("children")%>);
27 <%
28
29 i=i+1
30 rs.MoveNext
31Loop
32
33Set rs = Nothing
34%>
35parent.ArrToHtml(ArrNode,'<% = nodeid %>');
36-->
37</script>
38<%
39Set conn = Nothing
40%>
<%Option Explicit%> 2
<script language="JavaScript"> 3
function NodeClass(id,Content,strLink,iChildren) 4
{ 5
//this.id=parseInt(id); 6
this.id=id; 7
this.Content=Content; 8
this.strLink=strLink; 9
this.iChildren=iChildren; 10
//this.iChildren=parseInt(iChildren); 11
} 12
13
var ArrNode = new Array(); 14
<% 15
Dim conn,rs,s,cls,href,Open 16
Dim nodeid,i 17
nodeid = Request.QueryString("id") 18
'On Error Resume Next 19
Set conn = Server.CreateObject("ADODB.Connection") 20
conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("tree.mdb") & ";Persist Security Info=False" 21
Set rs = Server.CreateObject("ADODB.Recordset") 22
rs.Open "select *,(select count(*) from deeptree where parentid = T.id) as children from deeptree T where parentid=" & nodeid & "",conn,1,3 23
i=0 24
Do While Not rs.EOF 25
%> 26
ArrNode[<%=i%>] = new NodeClass(<%=rs("id")%>,'<%=trim(rs("content"))%>','<%=trim(rs("link"))%>',<%=rs("children")%>); 27
<% 28
29
i=i+1 30
rs.MoveNext 31
Loop 32
33
Set rs = Nothing 34
%> 35
parent.ArrToHtml(ArrNode,'<% = nodeid %>'); 36
--> 37
</script> 38
<% 39
Set conn = Nothing 40
%> //********************* Node.htc *********************//
1<PUBLIC:COMPONENT>
2<PUBLIC:ATTACH EVENT="onmouseover" ONEVENT="fos()"/>
3<PUBLIC:ATTACH EVENT="onmouseout" ONEVENT="blu()"/>
4<PUBLIC:ATTACH EVENT="onselectstart" ONEVENT="st()"/>
5<SCRIPT>
6
function fos(){}{
7
if(style.backgroundColor!='#ffffff'){
8style.color="#000000"
9style.border="1 solid #888888"
10style.backgroundColor='#DDDDDD'
11
}
12else
13{}{style.color="#000000"
14style.border="1 solid #999999"
15style.backgroundColor='#ffffff'
16}
17}
18
19function blu(){}{
20if(style.backgroundColor!='#ffffff'){
21style.color="#000000"
22style.border="1 solid #f2f2f2"
23style.backgroundColor='#f2f2f2'
24}
25else
26{}{style.color="#000000"
27style.border="1 solid #999999"
28style.backgroundColor='#ffffff'
29}
30}
31
32function st(){}{
33return false;
34}
35</SCRIPT>
36</PUBLIC:COMPONENT>
<PUBLIC:COMPONENT> 2
<PUBLIC:ATTACH EVENT="onmouseover" ONEVENT="fos()"/> 3
<PUBLIC:ATTACH EVENT="onmouseout" ONEVENT="blu()"/> 4
<PUBLIC:ATTACH EVENT="onselectstart" ONEVENT="st()"/> 5
<SCRIPT> 6
function fos(){}{ 7
if(style.backgroundColor!='#ffffff'){ 8
style.color="#000000" 9
style.border="1 solid #888888" 10
style.backgroundColor='#DDDDDD' 11
} 12
else 13
{}{style.color="#000000" 14
style.border="1 solid #999999" 15
style.backgroundColor='#ffffff' 16
} 17
} 18
19
function blu(){}{ 20
if(style.backgroundColor!='#ffffff'){ 21
style.color="#000000" 22
style.border="1 solid #f2f2f2" 23
style.backgroundColor='#f2f2f2' 24
} 25
else 26
{}{style.color="#000000" 27
style.border="1 solid #999999" 28
style.backgroundColor='#ffffff' 29
} 30
} 31
32
function st(){}{ 33
return false; 34
} 35
</SCRIPT> 36
</PUBLIC:COMPONENT> //*************************** Style.css ****************//
1body{}{font-size:12px}
2#txt{}{font-size: 12px; color: #000000; font-family: Courier New;border:1 solid #3366cc}
3#hrf{}{font-size: 12px; color: #000000; font-family: Courier New;border:1 solid #3366cc}
4#sb{}{font-size: 12px; color: #000000; font-family: Courier New;background-color:#d2e8ff;border:1 solid #3366cc;cursor:hand}
5.node{}{position:relative;left:2;height:20;padding:3 3 1 3;font-size:12px;font-family: Courier New;cursor:hand;border:1 solid #f2f2f2;behavior:url(css/node.htc)}
6.load{}{position:relative;left:2;height:20;padding:1 3 1 3;font-size:12px;font-family: Courier New;cursor:hand;border:1 solid #999999;background-color:#f2f2f2;color:#999999}
7.td_node{}{height:22px}
8#treedir{}{
9}
10span.diropen
11{}{ padding-left:2px;
12 overflow:hidden;
13 line-height:3px;
14 font-size:12px;
15 padding-top:5px;
16 width:11px;
17 height:11px;
18 border:solid 1px black;
19 background-color:#ffffff;
20 cursor:hand;
21}
22span.dirclose
23{}{
24 line-height
body{}{font-size:12px} 2
#txt{}{font-size: 12px; color: #000000; font-family: Courier New;border:1 solid #3366cc} 3
#hrf{}{font-size: 12px; color: #000000; font-family: Courier New;border:1 solid #3366cc} 4
#sb{}{font-size: 12px; color: #000000; font-family: Courier New;background-color:#d2e8ff;border:1 solid #3366cc;cursor:hand} 5
.node{}{position:relative;left:2;height:20;padding:3 3 1 3;font-size:12px;font-family: Courier New;cursor:hand;border:1 solid #f2f2f2;behavior:url(css/node.htc)} 6
.load{}{position:relative;left:2;height:20;padding:1 3 1 3;font-size:12px;font-family: Courier New;cursor:hand;border:1 solid #999999;background-color:#f2f2f2;color:#999999} 7
.td_node{}{height:22px} 8
#treedir{}{ 9
} 10
span.diropen 11
{}{ padding-left:2px; 12
overflow:hidden; 13
line-height:3px; 14
font-size:12px; 15
padding-top:5px; 16
width:11px; 17
height:11px; 18
border:solid 1px black; 19
background-color:#ffffff; 20
cursor:hand; 21
} 22
span.dirclose 23
{}{ 24
line-height