一款利用asp文件上傳組件把文件上傳到服務器之前進行判斷文件大小否超過指定大小了，本實例講的是upload_5xsoft文件上傳組件哦,file.filesize>1000000就可以限制文件為多少k。
dim upload,file,formname,formpath,icount,filename,fileext
set upload=new upload_5xsoft '建立上傳對象
formpath="download/" '在目錄後加(/)
if right(formpath,1)<>"/" then formpath=formpath&"/"
for each formname in upload.file '列出所有上傳了的文件
set file=upload.file(formname) '生成一個文件對象
if file.filesize>1000000 then
message=1
else '如果 filesize <20000 說明有文件數據
fileext=lcase(right(file.filename,4))
if fileext<>".exe" and fileext<>".zip" and fileext<>".rar" and fileext<>".mxp" then
message=2
else
randomize
rannum=int(90000*rnd)+10000
filename=formpath& "lemongtree_" & year(now)&month(now)&day(now)&hour(now)&minute(now)&second(now)&rannum&fileext
file.saveas server.mappath(filename) '保存文件
if fileext=".zip" then
uploadtype = "zip"
elseif fileext=".rar" then
uploadtype = "rar"
elseif fileext=".mxp" then
uploadtype = "mxp"
elseif fileext=".exe" then
uploadtype = "exe"
end if
uploadchar = filename
size = clng(file.filesize)/1000
message=3
end if
end if
next
%>
<% if message=1 then%>
<html>
<head>
<title>大小超標</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<script language=網頁特效>
function error_size()
{
alert("文件大小超過1000kb，請重新選擇。");
window.location="upload.asp";
}
</script>
</head>
<body bgcolor="#f2f2f2" leftmargin="0" topmargin="0" onload="error_size()">
</body>
</html>
<% elseif message=2 then%>
<html>
<head>
<title>類型不匹配</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<script language=javascript>
function error_type()
{
alert("只能上傳 zip / rar / exe /mxp 文件n請選擇正確的文件類型！");
window.location="upload.asp";
}
</script>
</head>
<body bgcolor="#f2f2f2" leftmargin="0" topmargin="0" onload="error_type()">
</body>
</html>
<% elseif message=3 then%>
<html>
<head>
<title>上傳成功</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
<script language=javascript>
function image_success()
{
alert("文件上傳成功！");
parent.form1.url1.value="<%=uploadchar %>"
parent.form1.size.value="<%=size%>k"
window.location="upload.asp";
}
</script>
</head>
<body bgcolor="#f2f2f2" leftmargin="0" topmargin="0" onload="image_success()">
</body>
</html>
<% end if %>
<%
set file=nothing
set upload=nothing ''刪除此對象
%>
