[转载]把无限级分类生成数组
把无限级分类循环出来确实是一件头疼的事情。比如，我们要循环出一个SELECT,或一个TABLE，要写一大堆判断。
有没好点的办法呢？
我的做法是生成数组，可以重复调用，直接循环数组就行了。
为了方便，我把它写成了类。
class.asp
返回所有分类的数组,并按顺序排列
有4个属性：
set aa=new classlist
aa.id="id"//编号的名称
aa.classname="classname"//分类名称
aa.pid="pid"//父ID名称
aa.db_name="class"//表名
list=aa.arrylist()
<%
class classlist
private c_id
private c_db_name
private c_pid
private c_classname
public property let id(str)
c_id = str
end property
public property let db_name(str)
c_db_name = str
end property
public property let pid(str)
c_pid = str
end property
public property let classname(str)
c_classname = str
end property
dim list()
dim i,n
Private Sub Class_Initialize()'初始化变量
i=0
n=0
End Sub
public function classarry(thisid,pid)'取得下级ID
if pid>0 then
sql="select * from "&c_db_name&" where "&c_pid&"="&thisid
else
sql="select * from "&c_db_name&" where "&c_id&"="&thisid
end if
set rs_c=conn.execute(sql)
n=n+1
do while not rs_c.eof
list(0,i)=rs_c(c_id)'装入数组中
list(1,i)=rs_c(c_classname)
list(2,i)=n
'n=n+1
i=i+1
thisid=classarry(rs_c(c_id),1)'这里递归调用,直到最后一个子类
rs_c.movenext
loop
n=n-1
rs_c.close
end function
public function arrylist()'循环出所有根类
set rs_c=conn.execute("select count("&c_id&") from "&c_db_name)
lenght=rs_c(0)
rs_c.close
redim list(2,lenght)'设置数组
set rs1=conn.execute("select "&c_id&" from "&c_db_name&" where "&c_pid&"=0")
do while not rs1.eof
call classarry(rs1(c_id),0)
'n=1
rs1.movenext
loop
rs1.close
arrylist=list
end function
end class
%>
class classlist
private c_id
private c_db_name
private c_pid
private c_classname
public property let id(str)
c_id = str
end property
public property let db_name(str)
c_db_name = str
end property
public property let pid(str)
c_pid = str
end property
public property let classname(str)
c_classname = str
end property
dim list()
dim i,n
Private Sub Class_Initialize()'初始化变量
i=0
n=0
End Sub
public function classarry(thisid,pid)'取得下级ID
if pid>0 then
sql="select * from "&c_db_name&" where "&c_pid&"="&thisid
else
sql="select * from "&c_db_name&" where "&c_id&"="&thisid
end if
set rs_c=conn.execute(sql)
n=n+1
do while not rs_c.eof
list(0,i)=rs_c(c_id)'装入数组中
list(1,i)=rs_c(c_classname)
list(2,i)=n
'n=n+1
i=i+1
thisid=classarry(rs_c(c_id),1)'这里递归调用,直到最后一个子类
rs_c.movenext
loop
n=n-1
rs_c.close
end function
public function arrylist()'循环出所有根类
set rs_c=conn.execute("select count("&c_id&") from "&c_db_name)
lenght=rs_c(0)
rs_c.close
redim list(2,lenght)'设置数组
set rs1=conn.execute("select "&c_id&" from "&c_db_name&" where "&c_pid&"=0")
do while not rs1.eof
call classarry(rs1(c_id),0)
'n=1
rs1.movenext
loop
rs1.close
arrylist=list
end function
end class
%>
