如何在 PowerShell 中正确获取系统模型并将其设置为参数？

• 首先，我建议简化您的属性检索命令：

  • 使用 Select-Object 从调用发出的对象中提取单个属性Get-WmiObject

  • 也许令人惊讶的是，类似（缩写：）的东西不会返回输入对象属性的值，它为每个输入对象返回一个新对象，该对象是类型并且本身具有属性。... | Select Product... | Select-Object -Property Product.Product[pscustomobject]Product

  • 若要仅提取属性值，请使用 Select-Object 的 -ExpandProperty 参数，而不是 （位置隐含） 参数;
    例如 ... |Select-Object -ExpandProperty 产品。-Property

  • 有关更多信息和更有效的替代方案，请参阅这篇文章。

• 其次，布尔逻辑存在问题，将在下一节中解释。

但是，我建议简化您的条件如下：

# Sample input objects.
@(
  $null
  [pscustomobject] @{ Version = $null }
  [pscustomobject] @{ Version = '' }
  [pscustomobject] @{ Version = 'System Version' }
  [pscustomobject] @{ Version = 'To be filled by O.E.M.' }
  [pscustomobject] @{ Version = '1' }

) | ForEach-Object {
  
  $ProductVersion = $_

  # Output $true only if $ProductVersion is an object that has 
  # a .Version property whose value is neither $null, the empty string
  # nor 'System Version' nor 'To be filled by O.E.M.'
  $ProductVersion.Version -notlike '' -and 
    $ProductVersion.Version -notin 'System Version', 'To be filled by O.E.M.'

}

• $ProductVersion.Version -notlike ''确保属性值既不是空字符串，也不是空字符串（甚至确保本身不是空字符串，尽管在您的情况下不应发生这种情况）。.Version$null$ProductVersion$null

• -notin 运算符提供了一种方便的方法来测试 LHS 字符串值是否不等于 RHS 数组的任何元素。

输出：

False
False
False
False
False
True

至于你试过的：

((!($ProductVersion.Version -ne 'System Version')) -or (!($ProductVersion.Version -ne 'To be filled by O.E.M.'))

这可以简化为：

$ProductVersion.Version -eq 'System Version' -or $ProductVersion.Version -eq 'To be filled by O.E.M.'

并且与您想要的相反，即如果找到任何一个字符串值，它将返回。$true

您可以将表达式作为一个整体来否定（ 和 -not 是同一个运算符）：!

-not ($ProductVersion.Version -eq 'System Version' -or $ProductVersion.Version -eq 'To be filled by O.E.M.')

或 use 代替 ，这需要您更改为：-ne-eq-or-and

$ProductVersion.Version -ne 'System Version' -and $ProductVersion.Version -ne 'To be filled by O.E.M.'

-xor，仅当正好一个操作数为 时才返回 true，这里不需要，因为它需要计算两个操作数，这里不需要。$true

    $BaseBoardProduct = Get-WmiObject Win32_BaseBoard | Where-Object {$_.Product -ne 'Not Available'} | Select-Object -ExpandProperty Product
    if (-not ([string]::IsNullOrWhiteSpace($BaseBoardProduct)))
    {
        $Model = $BaseBoardProduct
    }
    
    $ProductVersion = Get-WmiObject -Class:Win32_ComputerSystemProduct | Where- Object {$_.Version -ne 'System Version' -and $_.Version -ne 'To be filled by O.E.M.'} | Select-Object -ExpandProperty Version
    if (-not ([string]::IsNullOrWhiteSpace($ProductVersion)))
    {
        $Model = $ProductVersion
    }
    
    $SystemModel = Get-WmiObject -Class:Win32_ComputerSystem | Where-Object {$_.Model -ne 'System Product Name' -and $_.Model -ne 'To be filled by O.E.M.'} | Select-Object -ExpandProperty Model
    if (-not ([string]::IsNullOrWhiteSpace($SystemModel)))
    {
        $Model = $SystemModel
    }
    
    $SystemManufacturer = Get-WmiObject -Class:Win32_ComputerSystem | Where- Object {$_.Manufacturer -ne 'Not Available' -and $_.Manufacturer -ne 'System manufacturer' -and $_.Manufacturer -ne 'To be filled by O.E.M.'} | Select-Object -ExpandProperty Manufacturer
    if (-not ([string]::IsNullOrWhiteSpace($SystemManufacturer)))
    {
        $Manufacturer = $SystemManufacturer
    }
    
    if ($Manufacturer -like '*Lenovo*')
    {
        $ProductVersion = Get-WmiObject -Class:Win32_ComputerSystemProduct | 
Select-Object -ExpandProperty Version
        $Model = $ProductVersion
    }

解决了我的问题！然而，ChatGPT 想出了

$ExcludedManufacturers = 'Not Available', 'System Manufacturer', 'To be filled by O.E.M.'
$Filter = "Manufacturer!='Not Available' AND Manufacturer!='System Manufacturer' AND Manufacturer!='To be filled by O.E.M.'"

$SystemInfo = Get-CimInstance -ClassName Win32_ComputerSystem -Property Model, Manufacturer -Filter $Filter | Sort-Object Manufacturer
$BaseBoardProduct = Get-CimInstance -ClassName Win32_BaseBoard -Property Product -Filter "Product!='Not Available'" | Sort-Object Product | Select-Object -First 1
$ProductVersion = $SystemInfo | Where-Object { $_.Version -notin 'System Version', 'To be filled by O.E.M.' } | Sort-Object Manufacturer | Select-Object -First 1 -ExpandProperty Version
$Model = ($BaseBoardProduct.Product, $SystemInfo.Model) | Where-Object { $_ -notin 'System Product Name', 'To be filled by O.E.M.' } | Select-Object -First 1
$Manufacturer = $SystemInfo[0].Manufacturer

if ($Manufacturer -like '*Lenovo*') {
    $Model = $ProductVersion
}

或

$BaseBoardProduct = Get-WmiObject -Class Win32_BaseBoard | Select-Object -ExpandProperty Product | Where-Object {$_ -ne 'Not Available'} | Select-Object -First 1
$ProductVersion = Get-WmiObject -Class Win32_ComputerSystemProduct | Select-Object -ExpandProperty Version | Where-Object {$_ -notin ('System Version', 'To be filled by O.E.M.')} | Select-Object -First 1
$SystemModel = Get-WmiObject -Class Win32_ComputerSystem | Select-Object -ExpandProperty Model | Where-Object {$_ -notin ('System Product Name', 'To be filled by O.E.M.')} | Select-Object -First 1
$SystemManufacturer = Get-WmiObject -Class Win32_ComputerSystem | Select-Object -ExpandProperty Manufacturer | Where-Object {$_ -notin ('Not Available', 'System Manufacturer', 'To be filled by O.E.M.')} | Select-Object -First 1

if ($SystemManufacturer -like '*Lenovo*') {
    $Model = $ProductVersion
} else {
    $Model = $BaseBoardProduct ?? $SystemModel ?? $ProductVersion
}

适用于旧版本的 PowerShell！