PowerShell 技能连载 - WMI 搜索工具

适用于 PowerShell 所有版本

WMI 是一个很棒很强大的技术：只需要指定一个 WMI 类名，您就可以获取该类的所有实体。

PS> Get-WmiObject -Class Win32_BIOS


SMBIOSBIOSVersion : 76CN27WW
Manufacturer      : LENOVO
Name              : 76CN27WW
SerialNumber      : 1006250300406
Version           : LENOVO - 1

那么如何知道有哪些 WMI 类呢？以下是一个搜索工具函数：

function Find-WMIClass
{
   param
   (
      [Parameter(Mandatory=$true)]
      $SearchTerm = 'Resolution'
   )

   Get-WmiObject -Class * -List |
   Where-Object { $_.Properties.Count -ge 3 } |
   Where-Object { $_.Name -notlike 'Win32_Perf*'  } |
   Where-Object {
      $ListOfNames = $_.Properties | Select-Object -ExpandProperty Name
      ($ListOfNames -like "*$SearchTerm*") -ne $null
   } |
   Sort-Object -Property Name
}

只需要指定一个搜索条件。该函数将会查找所有属性名中包含搜索条件的 WMI 类（可以用通配符来扩大搜索范围）。

这段代码能搜索属性以“resolution”结尾的 WMI 类：

PS> Find-WMIClass -SearchTerm *resolution


   NameSpace: ROOT\cimv2

Name                                Methods              Properties
----                                -------              ----------
CIM_CacheMemory                     {SetPowerState, R... {Access, AdditionalErr...
CIM_CurrentSensor                   {SetPowerState, R... {Accuracy, Availabilit...
CIM_FlatPanel                       {SetPowerState, R... {Availability, Caption...
CIM_Memory                          {SetPowerState, R... {Access, AdditionalErr...
CIM_MonitorResolution               {}                   {Caption, Description,...
CIM_NonVolatileStorage              {SetPowerState, R... {Access, AdditionalErr...
CIM_NumericSensor                   {SetPowerState, R... {Accuracy, Availabilit...
CIM_PCVideoController               {SetPowerState, R... {AcceleratorCapabiliti...
CIM_PointingDevice                  {SetPowerState, R... {Availability, Caption...
CIM_Printer                         {SetPowerState, R... {Availability, Availab...
CIM_Tachometer                      {SetPowerState, R... {Accuracy, Availabilit...
CIM_TemperatureSensor               {SetPowerState, R... {Accuracy, Availabilit...
CIM_VideoController                 {SetPowerState, R... {AcceleratorCapabiliti...
CIM_VideoControllerResolution       {}                   {Caption, Description,...
CIM_VolatileStorage                 {SetPowerState, R... {Access, AdditionalErr...
CIM_VoltageSensor                   {SetPowerState, R... {Accuracy, Availabilit...
Win32_CacheMemory                   {SetPowerState, R... {Access, AdditionalErr...
Win32_CurrentProbe                  {SetPowerState, R... {Accuracy, Availabilit...
Win32_DisplayControllerConfigura... {}                   {BitsPerPixel, Caption...
Win32_MemoryArray                   {SetPowerState, R... {Access, AdditionalErr...
Win32_MemoryDevice                  {SetPowerState, R... {Access, AdditionalErr...
Win32_NetworkAdapterConfiguration   {EnableDHCP, Rene... {ArpAlwaysSourceRoute,...
Win32_PointingDevice                {SetPowerState, R... {Availability, Caption...
Win32_Printer                       {SetPowerState, R... {Attributes, Availabil...
Win32_PrinterConfiguration          {}                   {BitsPerPel, Caption, ...
Win32_SMBIOSMemory                  {SetPowerState, R... {Access, AdditionalErr...
Win32_TemperatureProbe              {SetPowerState, R... {Accuracy, Availabilit...
Win32_VideoConfiguration            {}                   {ActualColorResolution...
Win32_VideoController               {SetPowerState, R... {AcceleratorCapabiliti...
Win32_VoltageProbe                  {SetPowerState, R... {Accuracy, Availabilit...

下一步，选择一个类名并观察它的实际数据：

PS> Get-WmiObject -Class CIM_CacheMemory | Select-Object -Property *