Question

我有一个旧脚本，这是我刚开始使用Powershell时写的第一个脚本。它使用Get-CimInstance -ClassName Win32_ComputerSystem和Get-CimInstance -ClassName Win32_OperatingSystem。将其废弃后可在某些用户系统上使用，然后发现某些用户对WMI具有某种奇怪的权限问题，并且无法使用该脚本。就我个人而言，我从未遇到过任何问题，也从未想到其他人会这样做。

因此，我希望摆脱WMI / CIM实例，并用.NET命令或其他在PowerShell脚本中使用的实例替换这些实例。除了WMI / CIM实例，脚本中还有其他要使用的东西吗？请参阅下面我要更改的脚本

$Comp = (Get-CimInstance -ClassName Win32_ComputerSystem); 
$DRole =   ($Comp).DomainRole;
switch ($DRole)
{
    0 {$DominRole = 'Standalone Workstation'}
    1 {$DominRole = 'Member Workstation'}
    2 {$DominRole = 'Standalone Server'}
    3 {$DominRole = 'Member Server'}
    4 {$DominRole = 'Backup Domain Controller'}
    5 {$DominRole = 'Primary Domain Controller'}
}
$PhyMem = [string][math]::Round(($Comp).TotalPhysicalMemory/1GB, 1);
$FreePhyMem = [string][math]::Round((Get-CimInstance -ClassName Win32_OperatingSystem).FreePhysicalMemory/1024/1024, 1);
$cpux = (Get-WmiObject Win32_Processor).Name;
$GBMem = $PhyMem + ' GB Physical Memory (' + $FreePhyMem + ' GB Free)';
Return $DominRole + ' - ' + $GBMem + '/' + $cpux

Answer 1

如果您至少使用PowerShell 5.1，Get-ComputerInfo将提供很多此类信息。您可以看到它提供的相关属性...

PS> Get-ComputerInfo -Property 'CsDomainRole', '*Memory*', '*Processor*'

否则，您可以使用System.Management namespace中的类以直接查询WMI的方式，就像Get-WmiObject在幕后...

$selectedProperties = 'DomainRole', 'TotalPhysicalMemory'
# https://docs.microsoft.com/dotnet/api/system.management.selectquery
$query = New-Object -TypeName 'System.Management.SelectQuery' `
    -ArgumentList ('Win32_ComputerSystem', $null, $selectedProperties)
# https://docs.microsoft.com/dotnet/api/system.management.managementobjectsearcher
$searcher = New-Object -TypeName 'System.Management.ManagementObjectSearcher' `
    -ArgumentList $query

try
{
    # https://docs.microsoft.com/dotnet/api/system.management.managementobjectsearcher.get
    $results = $searcher.Get()
    # ManagementObjectCollection exposes an enumerator but not an indexer
    $computerSystem = $results | Select-Object -First 1

    $domainRole = $computerSystem['DomainRole']
    $totalPhysicalMemory = $computerSystem['TotalPhysicalMemory']

    # Do something with $domainRole and $totalPhysicalMemory...
    $domainRoleText = switch ($domainRole) {
        0 { 'Standalone Workstation'   ; break }
        1 { 'Member Workstation'       ; break }
        2 { 'Standalone Server'        ; break }
        3 { 'Member Server'            ; break }
        4 { 'Backup Domain Controller' ; break }
        5 { 'Primary Domain Controller'; break }
        default { $domainRole.ToString() }
    }
    $totalPhysicalMemoryGB = [Math]::Round($totalPhysicalMemory / 1GB, 1)
}
finally
{
    $computerSystem.Dispose()
    $results.Dispose()
    $searcher.Dispose()
}

很难知道您的问题是WMI本身还是cmdlet在没有更多详细信息的情况下访问它。

基于Powershell的WMI命令替代

1 个答案: