在 FileSystemWatcher (Powershell) 中调用函数和变量

如何解决在 FileSystemWatcher (Powershell) 中调用函数和变量

我在 PS version: 4.0 上运行此脚本，但似乎无法从 -Action 参数外部访问函数或变量。

有没有办法调用变量，在外部声明并在内部调用的函数：

$action = { .....
   access them here <--------
}

function GetData{
    Write-host "this should show"
}

$somePath="D:\Temp"

$watcher=New-ObjectSystem.IO.FileSystemWatcher
$watcher.Path="D:\Temp"
$watcher.Filter="*.*"
$watcher.IncludeSubdirectories=$true
$watcher.EnableRaisingEvents=$true

$action={$path=$Event.sourceEventArgs.FullPath
   $changeType=$Event.sourceEventArgs.ChangeType
   $logline="$(Get-Date),$changeType,$path"
   
   #$somePath returns nothing <-------
   #GetData is not called at all  <-------
   GetData 
   Add-content"$($somePath)\log.txt"-value $logline
 }
 Register-ObjectEvent$watcher"Created"-Action $action
}