Remove-WmiObject - 删除用户配置文件

Question

这是远程删除用户配置文件的代码，具有以下约束/规则：

########## List of accounts/Student profiles older than 21 days and not test accounts to be deleted  #######################



foreach ($computer in (Get-Content e:\cleanupscript\scripts\ComputerList.csv)) {


if(Test-Connection -ComputerName $computer -count 1){
    $userfolders = Get-ChildItem "\\$computer\C$\users\"  | Select-Object -ExpandProperty Name
}


#The list of accounts, which profiles must not be deleted
$ExcludedUsers ="Public","administrator","csimg",”DefaultAppPool”, "ksnproxy", "test1","test2","test3","test4","test5","test6","test7","test8","test9","test10","test11","test12","test13","test14","test15","test16","test17","test18","test19","test20","test21","test22","test23","test24","test25","test26","test27","test28","test29","test30","test31","test32","test33","test34","test35","test36","test37","test38","test39","test40","test41","test42","test43","test44","test45","test46","test47","test48","test49","test50","test51","test52","test53","test54","test55","test56","test57","test58","test59","test60","test61","test62","test63","test64","test65","test66","test67","test68","test69","test70","test71","test72","test73","test74","test75","test76","test77","test78","test79","test80","test81","test82","test83","test84","test85"



        $StudentsProfiles = Get-WmiObject -ComputerName $computer -Class Win32_UserProfile | 
            Select-Object   PSComputerName,
                            Sid, 
                            LocalPath, 
                            @{Label='LastUseTime';Expression={$_.ConvertToDateTime($_.LastUseTime)} } |
                        
            
            Where-Object -FilterScript {![System.String]::IsNullOrWhiteSpace($_.LastUseTime)} |
            Where-Object -FilterScript {!($_.LocalPath -eq "C:\Windows\ServiceProfiles\ksnproxy")} |
            Where-Object -FilterScript {!($ExcludedUsers -like ($_.LocalPath.Replace("C:\Users\","")))} |
            Sort-Object -Property {($_.LastUseTime)} |
            Select-Object -First 3 |
         

foreach ($StudentsProfile in $StudentsProfiles)
{

    #Write-Host $StudentsProfile.LocalPath, $computer,  $StudentsProfile.LastUseTime,  "profile existing” -ForegroundColor Red

    
    if (!($ExcludedUsers -like ($StudentsProfile.LocalPath.Replace("C:\Users\",""))))
    {     
        $StudentsProfile | Remove-WmiObject 
        Write-Host $computer, $StudentsProfile.LocalPath, $StudentsProfile.LastUseTime,  "profile deleted” -ForegroundColor Magenta
    }
          
}

}

Remove-WmiObject : 输入对象不能绑定到命令的任何参数，因为命令不接受管道输入或 input 及其属性与任何接受管道输入的参数都不匹配。 在 line:1 char:7

• $st | Remove-WmiObject -Authentication Connect

•   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

  • CategoryInfo : InvalidArgument: (@{PSComputerNam...-07 6:49:46 AM}:PSObject) [Remove-WmiObject], ParameterBindingException
  • FullyQualifiedErrorId : InputObjectNotBound,Microsoft.PowerShell.Commands.RemoveWmiObject

Answer 1

^{顺便说一句：CIM cmdlet（例如，Get-CimInstance）取代了 PowerShell v3（2012 年 9 月发布）中的 WMI cmdlet（例如，Get-WmiObject）。因此，应该避免使用 WMI cmdlet，尤其是因为 PowerShell (Core) (v6+)，未来的所有努力都将用于，甚至不再拥有它们。但是请注意，WMI 仍然是 CIM cmdlet 的基础。如需更多信息，请参阅this answer。}

• 当Remove-WmiObject 接收到来自管道的输入 时，它需要System.Management.ManagementObject 类型的输入对象，该对象绑定到它的-InputObject 参数。

• 相比之下，您的 $StudentsProfiles 变量确实不包含此类型的对象，因为您已将 Select-Object 与属性名称应用于原始 Get-WmiObject调用，它创建通用类型的对象，[pscustomobject]，它与输入对象的类型无关，并且只包含具有从输入对象的相同属性复制的值的指定属性名字。

因此，将集合$StudentsProfiles 中的对象通过管道传送到Remove-WmiObject 会导致您看到的错误：输入对象的类型错误。

---

解决方案：

省略Select-Object PSComputerName, ... 调用并将管道限制为仅过滤（Where-Object 调用、Select-Object 调用与-Last）和排序 命令，两者都不会改变输入对象的身份：

使用流水线的简化版本：

$StudentsProfiles = Get-WmiObject -ComputerName $computer -Class Win32_UserProfile | 
  Where-Object -FilterScript {
    $_.LastUseTime -and 
      $_.LocalPath -ne "C:\Windows\ServiceProfiles\ksnproxy" -and
        (Split-Path -Leaf $_.LocalPath) -notin $ExcludedUsers
  } |
    Sort-Object LastUseTime |
      Select-Object -First 3

注意：$_.ConvertToDateTime($_.LastUseTime) - 即显式转换为 [datetime] - 实际上并不需要：

• 要测试该值是否为非空（非空），$_.LastUseTime - 这是一个表示时间戳的 字符串，可以按原样使用，因为解释 $null 或''（空字符串）作为布尔值产生$false，而任何非空字符串产生$true。

• 同样，LastUseTime 可以传递给Sort-Object 以直接按此属性值排序，因为时间戳的字符串表示形式 - 例如'20211110143544.500000-300' - 以 lexical 排序等同于 chronological 排序的方式构造。

顺便说一句：首选 CIM cmdlet 在这方面优于 WMI cmdlet：它们将时间戳直接表示为 [datetime] - 无需转换。