ASP 无限级分类实现

<%
'函数：getCatagory
'功能：获得分类列表
'参数：cat_arr -> 分类数组(Rscordset:id:分类编号,pid:上级分类,classname:分类名称,childs:子分类)
' 按此输出些sql语句，用getRows获取得到的数据
' cat_pid -> 上级分类编号
' cat_childs -> 下级分类编号
' cat_select -> 选择的分类
' cat_dir -> 分类级别
'返回：返回分类列表(Option)

dim conn,cmd,rs,cat_arr
Set conn = Server.CreateObject("ADODB.Connection")
Set cmd = Server.CreateObject("ADODB.Command")

conn.Open "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Server.MapPath("db1.mdb")
cmd.ActiveConnection = conn
cmd.CommandText = "Select * from cate order by id desc"
Set rs = cmd.Execute
cat_arr = rs.GetRows()
Set rs = Nothing
Set cmd = Nothing
Set conn = Nothing

getCatagory cat_arr,0,"","","","{$cat.dir}├─{$cat.name}
"&vbcrlf

function getCatagory(byval cat_arr,byval cat_pid,byval cat_childs,byval cat_select,byval cat_dir,byval format)
dim i,tmp
if isArray(cat_arr) then
for i=0 to ubound(cat_arr,2)
if cat_arr(1,i) = cat_pid and instr("," & cat_childs & ",","," & cat_arr(0,i) & ",") = 0 then
tmp = format
if instr(tmp,"{$cat.dir}")>0 then tmp = replace(tmp,"{$cat.dir}",cat_dir)
if instr(tmp,"{$cat.id}")>0 then tmp = replace(tmp,"{$cat.id}",cat_arr(0,i))
if instr(tmp,"{$cat.pid}")>0 then tmp = replace(tmp,"{$cat.pid}",cat_arr(1,i))
if instr(tmp,"{$cat.name}")>0 then tmp = replace(tmp,"{$cat.name}",cat_arr(2,i))
if instr(tmp,"{$cat.childs}")>0 then tmp = replace(tmp,"{$cat.childs}",cat_arr(3,i))
response.write tmp
call getCatagory(cat_arr,cat_arr(0,i),cat_childs,cat_select,cat_dir & "│",format)
end if
next
end if
end function
%>

//先取出最高级(parentid=0)的分类

<%
set conn=server.createobject("adodb.connection")
conn.open "Provider=Microsoft.Jet.Oledb.4.0;data source="&server.MapPath("db.mdb")
set rs1=server.createobject("adodb.recordset")
sql1="select * from Classtable where parentid=0 order by classid"
rs1.open sql1,conn,1,1
if rs1.eof or rs1.bof then
response.write"还没分类!"
else
while not rs1.eof
id1=rs1("classid")
name1=rs1("classname")

response.write "*"&classname0&"
")
call reclass(id0)

rs.movenext
i=i+1
wend
rs.close
set rs=nothing
end sub

if request("a")="add" then
call add
end if
if request("name")<>"" then
%>

" method="post">

	在添加小类
类别名:

<%end if
sub add '添加类别
id=request("id")
classname=request("classname")
set rs=server.createobject("adodb.recordset")
rs.open "select parentid,classdepth from classtable where classid="&id,conn,1,1
parentid=rs(0)
classdepth=rs(1)+1
rs.close
set rs=nothing
sql="INSERT INTO classtable (classname,parentid,classdepth) values ('"&classname&"‘,"&id&","&classdepth&")"
conn.execute sql
response.Write""
end sub
%>