asp.net 编程问题急

一个关于查看文件夹大小的程序
<%@ import namespace=system %>
<%@ import namespace=system.io %>
<%@ page language=vb debug=true %>
<script language=vb runat=server>
sub page_load(sender as object ,e as eventargs)
dim len as long = 0
dim path as string="N:\BYSJ\seldriver\qaz"
getdirectorylength(path,len)
response.write(len)
end sub
function getdirectorylength(path as string,len as long)
dim i as integer
if ubound(directory.getdirectories(path)) <> -1 then
for i=0 to ubound(directory.getdirectories(path))
'response.write(directory.getdirectories(path)(i) & "</br>")
getdirectorylength(directory.getdirectories(path)(i),len)
next
end if

dim j as integer
for j=0 to ubound(directory.getfiles(path,"*.*"))
'response.write(directory.getfiles(path,("*.*"))(j) & " ")
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