VBS脚本可删除早于n天的文本文件

我要删除n天前创建的某个目录中的所有文本文件。将其视为家务任务。

我目前有一个脚本可以很好地完成此任务，但是它使用文件的创建日期。现在，我必须检查文件名中的日期，并删除所有与script参数匹配的文本文件。

' Objective: To delete old files from a given folder and all subfolders below
'
'
' Format: cscript deloldfiles.vbs {DriveLetter:\FolderName} {#ofDays}
'     or: cscript deloldfiles.vbs {\\servername\FolderName} {#ofDays}
' Example: cscript deloldfiles.vbs c:\dba\log 3
'    (deletes files older than 3 days from the \dba\log file on drive C:)

Set objArgs = WScript.Arguments
FolderName =objArgs(0)
Days=objArgs(1)

set fso = createobject("scripting.filesystemobject")
set folders = fso.getfolder(FolderName)
datetoday = now()
newdate = dateadd("d", Days*-1, datetoday)
wscript.echo "Today:" & now()
wscript.echo "Started deleting files older than :" & newdate 
wscript.echo "________________________________________________"
wscript.echo ""
recurse folders 
wscript.echo ""
wscript.echo "Completed deleting files older than :" & newdate 
wscript.echo "________________________________________________"

sub recurse( byref folders)
  set subfolders = folders.subfolders
  set files = folders.files
  wscript.echo ""
  wscript.echo "Deleting Files under the Folder:" & folders.path
  wscript.echo "__________________________________________________________________________"
  for each file in files
    if file.datelastmodified < newdate then
      wscript.echo "Deleting " & folders.path & "\" & file.name & " last modified: " & file.datelastmodified
      on error resume next
' === to test this script but not actually delete files, comment out the next line ===
    file.delete
    end if

  next  

  for each folder in subfolders
    recurse folder
  next  

  set subfolders = nothing
  set files = nothing

end sub

文字档：

SynchroniseUsersFromBBS_LOG_20140910_412.txt
SynchroniseUsersFromBBS_LOG_20140810_1023.txt
SynchroniseUsersFromBBS_LOG_20141010_1523.txt
SynchroniseUsersFromBBS_LOG_20141022_1023.txt
SynchroniseUsersFromBBS_LOG_20141023_1023.txt

任何想法如何做到这一点？