Powershell-使用WMIC時如何在沒有VariableValue的情況下獲取輸出-有解無憂

下午好，我相信這會讓你們一切都很好。

我正在學習 powershell，如果有人可以幫助我解決以下問題，我將不勝感激：使用以下 wmic cmd 時，我無法僅獲得輸出：

wmic OS Get DataExecutionPrevention_SupportPolicy

這就是我從那條線上得到的：

PS C:\_Admin_RPC> wmic OS Get DataExecutionPrevention_SupportPolicy
DataExecutionPrevention_SupportPolicy  

2

我已經嘗試了很多東西，但它不起作用，如果有人可以幫助我，我將不勝感激。

我打算做的是將值 (2) 保存在一個變數中，然后如果該值是我正在尋找的值，則使用 write-output 回傳 $true。

感謝你并致以真誠的問候。

和平

uj5u.com熱心網友回復：

當您使用 PowerShell 時，最好使用本機 PowerShell cmdlet 或 .NET 類，因為您獲取的是物件而不是字串值。這使得訪問某些值變得更加容易，可以提供進一步處理的方法等。

所以回到你的問題，原則上你可以這樣做：

wmic 在這種情況下回傳一個字串陣列，您要查找的值是第三個元素：

#get the value
(wmic OS Get DataExecutionPrevention_SupportPolicy)[2]

#get the value and store it in a variable
$value = (wmic OS Get DataExecutionPrevention_SupportPolicy)[2]

正如 js2010 已經在 PowerShell 上指出的那樣，有get-wmiobject一個相當于 wmic 的 cmdlet。但是這個已經被替換了get-cimInstance。所以PowerShell的方式是：

#Get all properties from class
$value = Get-CimInstance -ClassName win32_operatingsystem

#Display whole object
$value | fl *

#Access specific value
$value.'DataExecutionPrevention_SupportPolicy'

#For further optimization query only attributes needed instead of all
$value = Get-CimInstance -query "Select DataExecutionPrevention_SupportPolicy from win32_operatingsystem"
$value.'DataExecutionPrevention_SupportPolicy'

如果屬性具有預期值，您想要true或回傳。false所以我們不需要存盤那個值，我們可以簡單地查詢是否設定了期望值，然后回傳trueor false：

#Query for DataExecutionPrevention_SupportPolicy = 2 and return true or false 
If (Get-CimInstance -query "Select DataExecutionPrevention_SupportPolicy from win32_operatingsystem where DataExecutionPrevention_SupportPolicy = 2"){
    #output on screen only
    write-host $true
}
Else {
    #output on screen only
    write-host $false
}

如果您還想知道設定了哪個值，可以執行以下操作：

#Query for DataExecutionPrevention_SupportPolicy, create object and write csv
$obj = Get-CimInstance -query "Select DataExecutionPrevention_SupportPolicy from win32_operatingsystem"
If ($obj.'DataExecutionPrevention_SupportPolicy' -eq 2){
    $result = [PSCustomObject]@{
        'DataExecutionPrevention_SupportPolicy' = $obj.'DataExecutionPrevention_SupportPolicy'
        'isExpectedValue' = $true
    }
}
Else {
    $result = [PSCustomObject]@{
        'DataExecutionPrevention_SupportPolicy' = $obj.'DataExecutionPrevention_SupportPolicy'
        'isExpectedValue' = $false
    }
}
#write result to disk as csv
$result | export-csv [path] -Delimiter ";" -Encoding:utf8 -NoClobber -NoTypeInformation

uj5u.com熱心網友回復：

js2010 和 Toni 都回答了我的問題。

然而，最好的答案是托尼的，因為他考慮到了我的要求，并用他的解釋把它們帶到了另一個層次。

最后，這是我根據我面臨的場景使用的解決方案：

$value = Get-CimInstance -ClassName win32_operatingsystem | Select-Object -Property 'DataExecutionPrevention_SupportPolicy'

$value = $value.DataExecutionPrevention_SupportPolicy

if($value -eq 1){
    Write-Output $true
}

非常感謝你們的幫助和支持。

和平

uj5u.com熱心網友回復：

你可以在 wmic 中做的任何事情都可以在 powershell 中做。

WMIC wmi 類別名：

（或在 powershell “get-wmiobject -n root\cli msft_clialias”中，因為別名本身是 wmi 類別名）

我對它們進行了分類。這些可能是最有用的 wmi 類（除了 win32_userprofile）。

wmic alias get friendlyname,target

FriendlyName         Target
Alias                Select * from Msft_CliAlias
BIOS                 Select * from Win32_BIOS
BaseBoard            Select * from Win32_BaseBoard
BootConfig           Select * from Win32_BootConfiguration
CDROM                Select * from Win32_CDROMDrive
CPU                  Select * from WIN32_PROCESSOR
CSProduct            Select * from Win32_ComputerSystemProduct
ComputerSystem       Select * from Win32_ComputerSystem
DCOMAPP              Select * from WIN32_DCOMApplication
DESKTOP              Select * from WIN32_DESKTOP
DMAChannel           Select * from Win32_DMAChannel
DataFile             Select * from CIM_DataFile
DesktopMonitor       Select * from WIN32_DESKTOPMONITOR
DeviceMemoryAddress  Select * from Win32_DeviceMemoryAddress
DiskDrive            Select * from Win32_DiskDrive
DiskQuota            Select * from Win32_DiskQuota
Environment          Select * from Win32_Environment
FSDir                Select * from Win32_Directory
Group                Select * from Win32_Group
IDECONTROLLER        Select * from Win32_IDEController
IRQ                  Select * from Win32_IRQResource
Job                  Select * from Win32_ScheduledJob
LOGON                Select * from Win32_LogonSession
LoadOrder            Select * from Win32_LoadOrderGroup
LogicalDisk          Select * from Win32_LogicalDisk
MEMCACHE             Select * from WIN32_CACHEMEMORY
MemPhysical          Select * from Win32_PhysicalMemoryArray
MemoryChip           Select * from Win32_PhysicalMemory
NIC                  Select * from Win32_NetworkAdapter
NICConfig            Select * from Win32_NetworkAdapterConfiguration
NTDOMAIN             Select * from Win32_NTDomain
NTEvent              Select * from Win32_NTLogEvent
NTEventLog           Select * from Win32_NTEventlogFile
NetClient            Select * from WIN32_NetworkClient
NetLogin             Select * from Win32_NetworkLoginProfile
NetProtocol          Select * from Win32_NetworkProtocol
NetUse               Select * from Win32_NetworkConnection
OS                   Select * from Win32_OperatingSystem
OnBoardDevice        Select * from Win32_OnBoardDevice
PageFile             Select * from Win32_PageFileUsage
PageFileSet          Select * from Win32_PageFileSetting
Partition            Select * from Win32_DiskPartition
Port                 Select * from Win32_PortResource
PortConnector        Select * from Win32_PortConnector
PrintJob             Select * from Win32_PrintJob
Printer              Select * from Win32_Printer
PrinterConfig        Select * from Win32_PrinterConfiguration
Process              Select * from Win32_Process
Product              Select * from Win32_Product
QFE                  Select * from Win32_QuickFixEngineering
QuotaSetting         Select * from Win32_QuotaSetting
RDAccount            Select * from Win32_TSAccount
RDNIC                Select * from Win32_TSNetworkAdapterSetting
RDPermissions        Select * from Win32_TSPermissionsSetting
RDToggle             Select * from Win32_TerminalServiceSetting
RecoverOS            Select * from Win32_OSRecoveryConfiguration
Registry             Select * from Win32_Registry
SCSICONTROLLER       Select * from Win32_SCSIController
Server               Select * from Win32_PerfRawData_PerfNet_Server
Service              Select * from Win32_Service
ShadowCopy           Select * from Win32_ShadowCopy
ShadowStorage        Select * from Win32_ShadowStorage
Share                Select * from Win32_Share
SoftwareElement      Select * from Win32_SoftwareElement
SoftwareFeature      Select * from Win32_SoftwareFeature
SoundDev             Select * from WIN32_SoundDevice
Startup              Select * from Win32_StartupCommand
SysAccount           Select * from Win32_SystemAccount
SysDriver            Select * from Win32_SystemDriver
SystemEnclosure      Select * from Win32_SystemEnclosure
SystemSlot           Select * from Win32_SystemSlot
TapeDrive            Select * from Win32_TapeDrive
Temperature          Select * from Win32_TemperatureProbe
TimeZone             Select * from Win32_TimeZone
UPS                  Select * from Win32_UninterruptiblePowerSupply
UserAccount          Select * from Win32_UserAccount
Voltage              Select * from Win32_VoltageProbe
Volume               Select * from Win32_Volume
VolumeQuotaSetting   Select * from Win32_VolumeQuotaSetting
VolumeUserQuota      Select * from Win32_VolumeUserQuota
WMISet               Select * from Win32_WMISetting

所以 OS 是 win32_operatingsystem 的別名。% 或 foreach-object 是獲取屬性值的一種方法。

$value = get-wmiobject win32_operatingsystem | 
  % DataExecutionPrevention_SupportPolicy

前三名的命名空間不同，底部的命名空間消失了。

get-wmiobject -n Root\CIMV2\TerminalServices Win32_TerminalServiceSetting
get-wmiobject -n Root\CIMV2\TerminalServices Win32_TSAccount
get-wmiobject -n Root\CIMV2\TerminalServices Win32_TSPermissionsSetting

get-wmiobject Win32_UninterruptiblePowerSupply # Invalid class

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標籤：电源外壳wmic

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