Powershell如何从删除过程中排除文件夹

我有一个PowerShell脚本，用于从根文件夹及其子文件夹中删除Windows计算机上超过x天的所有类型的文件。这很好，但是现在我想从删除过程中排除2个子文件夹。尝试了Exclude命令，但由于我不熟悉Powershell，因此我正在努力使其正确

PowerShell version: 5.1

文件夹结构（要从删除过程中排除子目录2和子目录3）

脚本：

param([string] $dir = "C:\MainDir", 
      [string] $days = "15")
      $error.clear()
      try
      {


     $refDate = (Get-Date).AddDays(-$days)
    Get-ChildItem -Path $dir -Recurse | 
    Where-Object { !$_.PSIsContainer -and  $_.LastWriteTime -lt $refDate } | 
    Remove-Item -Force

    }


    catch  {

  Write-Error  $_

  }

  if (!$error) {
Write-Host  'Data deleted for files which are older than' $days 'Days'
}

---

由于您使用的是PS 5.1，因此可以使用

-File

开关，而不必使用

！$\。Where子句中的PSIsContainer

要排除子文件夹，可以尝试以下代码：

$refDate = (Get-Date).AddDays(-$days).Date  # set to midnight
$excludeFolders = 'SubDir2', 'SubDir3'      # an array of folder names to exclude

# create a regex of the folders to exclude
# each folder will be Regex Escaped and joined together with the OR symbol '|'
$notThese = ($excludeFolders | ForEach-Object { [Regex]::Escape($_) }) -join '|'

Get-ChildItem -Path $dir -Recurse -File | 
Where-Object { $_.DirectoryName -notmatch $notThese -and $_.LastWriteTime -lt $refDate } | 
Remove-Item -Force

$refDate = (Get-Date).AddDays(-$days).Date  # set to midnight
$excludeFolders = 'SubDir2', 'SubDir3'      # an array of folder names to exclude

# create a regex of the folders to exclude
# each folder will be Regex Escaped and joined together with the OR symbol '|'
$notThese = ($excludeFolders | ForEach-Object { [Regex]::Escape($_) }) -join '|'

Get-ChildItem -Path $dir -Recurse -File | 
Where-Object { $_.DirectoryName -notmatch $notThese -and $_.LastWriteTime -lt $refDate } | 
Remove-Item -Force