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类似 MSDN CSDN 左边导航树效果的实现! [JavaScript + ASP]

2003-01-20 09:51 846 查看
MSDN 和CSDN 左边导航树的效果都是在点击父节点时,再发出请求填充其子节点!好像网页只刷新部分! JavaScript + [ASP + Access] 实现

源程序下载: http://www.triaton.com.cn/Private/Zip/Tree.zip

<!-- Tree.asp -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<iframe width="100%" height="30" id="hiddenframe"></iframe>
<script>
function ExpandNode(ParentNode,ParentId){
var NodeX = eval(ParentNode.id + '_0');
if (NodeX.style.display == 'none')
{
NodeX.style.display="block";
if (NodeX.loaded == 'no')
{
document.frames['hiddenframe'].location.replace("http://localhost/dvbbs/subtree.asp?PID=" + ParentId + "&PNode=" + ParentNode.id);
NodeX.loaded = 'yes';
}
}
else
{
NodeX.style.display='none';
}
}
</script>
<CENTER>
<TABLE border="1" width="20%" height="60%">
<TR>
<TD>
<DIV style="OVERFLOW: auto;WIDTH: 100%;HEIGHT:100%">
<TABLE width =300%>
<TR>
<TD>
<%
dim adoConnection
set adoConnection = Server.CreateObject("ADODB.Connection")
'adoConnection.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=Test;Data Source=TRIATON/PSQL2KE"
adoConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("/dvbbs") & "/Tree.mdb;Persist Security Info=False"
dim adoRecordset
set adoRecordset = Server.CreateObject("ADODB.Recordset")
adoRecordset.Open "select *,(select count(*) from tree where parentid = T.id) as children from tree T where rootid = id ",adoConnection
dim i
i=0
do until adoRecordset.eof
%>
<div id='Node_<% = i %>'>
<a href='#'
<% if adoRecordset.Fields.item("Children").value >0 then %>
onClick='ExpandNode(Node_<% = i %>,<% =adoRecordset.Fields.item("id").value%>)'>+</a>
<% else %>
>-</a>
<% end if%>
<a href='#' onDblClick='ExpandNode(Node_<% = i %>,<% =adoRecordset.Fields.item("id").value%>)'><% =adoRecordset.Fields.item("remark").value%></a>
</div>
<div id='Node_<% = i %>_0' style='display: none' loaded='no'>
  正在加载 ...
</div>
<% i=i+1
adoRecordset.MoveNext
loop
adoRecordset.close
set adoRecordset = nothing
adoConnection.close
set adoConnection = nothing
%>
</TD>
</TR>
</TABLE>
</DIV>
</TD>
</TR>
</TABLE>
</CENTER>
</BODY>
</HTML>

<!-- SubTree.asp -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>
<BODY>
<%
dim parentid
parentid = request.querystring("PID")
parentnode = request.querystring("Parentnode")
dim adoConnection
set adoConnection = Server.CreateObject("ADODB.Connection")
' adoConnection.Open "Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Initial Catalog=Test;Data Source=TRIATON/PSQL2KE"

adoConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.mappath("/dvbbs") & "/Tree.mdb;Persist Security Info=False"
dim adoRecordset
set adoRecordset = Server.CreateObject("ADODB.Recordset")
adoRecordset.Open "select *,(select count(*) from tree where parentid =T.id ) as Children from tree T where parentid = " & parentid ,adoConnection
response.write adoRecordset.source
dim i
Dim SHTML
dim parentnode
parentnode = request.querystring("Pnode")
dim j
j= len(parentnode) - len(replace(parentnode,"_",""))
dim nSpace
for i=0 to j - 1
nSpace = nSpace + "  "
next
i=0
do until adoRecordset.eof
shtml = shtml _
& "<div id='" & parentnode & "_" & i + 1 & "'>" & nSpace _
& "<a href='#'"
if adoRecordset.Fields.item("Children").value >0 then
shtml = shtml & " onClick='ExpandNode(" & parentnode & "_" & i + 1 & "," & adoRecordset.Fields.item("id").value & ")'>+"
else
shtml = shtml & ">-"
end if
shtml = shtml & "</a>/n" & "<a href='#'"
if adoRecordset.Fields.item("Children").value >0 then
shtml = shtml & "onDblClick='ExpandNode(" & parentnode & "_" & i + 1 & "," & adoRecordset.Fields.item("id").value & ")'"
end if
shtml = shtml & ">" & adoRecordset.Fields.item("id").value & ": " & adoRecordset.Fields.item("remark").value & "</a></div>"
if adoRecordset.Fields.item("Children").value >0 then
shtml = shtml & "<div id='" & parentnode & "_" & i + 1 & "_0' style='display: none' loaded='no'>" & nSpace & "  正在加载 ...</div>"
end if
i=i+1
adoRecordset.MoveNext
loop
adoRecordset.close
set adoRecordset = nothing
adoConnection.close
set adoConnection = nothing
'response.write shtml
%>
<script>
var x = eval('parent.' + '<% =request.querystring("Pnode") & "_0"%>' ) ;
x.innerHTML="<% =shtml %>";
</script>
</BODY>
</HTML>

表结构:
Tree(id,parentid,remark)
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