VB获取文件大小的方法

<%
  ' Copyright (c) 2009, reusablecode.blogspot.com; some rights reserved.
  '
  ' This work is licensed under the Creative Commons Attribution License. To view
  ' send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, California
  ' 94305, USA.
  ' Retrieve the file size of a given file.
  function getFileSize(someFile)
    dim fs
    dim file
    set fs = Server.CreateObject("Scripting.FileSystemObject")
    set file = fs.GetFile(Server.MapPath(someFile))
    getFileSize = FormatFileSize(file.size)
    set file = nothing
    set fs = nothing
  end function
  ' Format a file size in the most practical units.
  ' Input: size in bytes
  function FormatFileSize(size)
    dim units
    dim factor
    units = Array("B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB")
    factor = log(size)  7
    FormatFileSize = Round(size / (1024 ^ factor), 2) & units(factor)
  end function
%>