Powershell小技巧之使用WMI工具

WMI是一个强大的技术：只需要简单的指定一个WMI类名就能返回它类的所有实例：

代码如下:

PS> Get-WmiObject -Class Win32_BIOS

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

你如何知道它有哪些类呢？这里有一款查找工具：

代码如下:

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 
}

设置搜索条件后，代码将搜索出包含指定属性名的类（还可以通过通配符扩大搜索范围）

下面将找出所有包含“resolution”结尾的WMI类：

代码如下:

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...

接着，就可以使用类名查看它的有效数据啦：

代码如下:

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

心得：

其实有个类似功能的图形工具比这段代码更方便更直观，它叫ScriptomaticV2。

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