从 vbs 中具有特定扩展名的文件夹中获取最后修改的文件

问题描述

我有以下代码，我只需要找到扩展名为 PNG 的文件和最近的最后修改日期，我就能找到最后修改的日期，但是如果我检查文件的扩展名，它会出错的 [对象需要 'recentFile' 在行 [某个数字]]

i have the following piece of code all I need is to find the file with extension PNG and most recent last modified date, I am able to find the last modified date, but if I place check of extension over file it gives error of [Object needed 'recentFile' at line [some number]]

脚本

For Each objFile in colFiles
    ' Finds the latest modified file in folder
    if (recentFile is nothing) then
        Set recentFile = objFile
        elseif (objFile.DateLastModified > recentFile.DateLastModified) then
            Set recentFile = objFile
    end if
Next

我知道我可以稍后检查扩展名，但问题是如果有一个最新的而不是 PNG 的文件怎么办?虽然有些文件带有 PNG 扩展名但与其他文件相比不是最新的，所以我只需要为 PNG 文件找到最后修改日期为最新的 PNG，请帮助我如何实现它?

I know I can check extension later on but the issue is that what if there is a file which is latest and is not PNG? while there are files with PNG extension but not latest as compare to other files, so I just need to find PNG with last modified date to latest for only PNG files, please help how can I implement it?

推荐答案

先过滤扩展:

  Dim oLstPng : Set oLstPng = Nothing
  Dim oFile
  Dim goFS    : Set goFS    = CreateObject("Scripting.FileSystemObject")
  For Each oFile In goFS.GetFolder("..\testdata\17806396").Files
      If "png" = LCase(goFS.GetExtensionName(oFile.Name)) Then
         If oLstPng Is Nothing Then
            Set oLstPng = oFile ' the first could be the last
         Else
            If oLstPng.DateLastModified < oFile.DateLastModified Then
               Set oLstPng = oFile
            End If
         End If
      End If
  Next
  If oLstPng Is Nothing Then
     WScript.Echo "no .png found"
  Else
     WScript.Echo "found", oLstPng.Name, oLstPng.DateLastModified
  End If

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