Get-WMIInfo.ps1

# =====================================================================================
# 
# Microsoft PowerShell Source File -- Created with SAPIEN Technologies PrimalScript 2009
# 
# NAME: Get-WMIInfo.ps1
# 
# AUTHOR: Jeffery Hicks , SAPIEN Technologies
# DATE  : 6/11/2009
# 
# COMMENT: Discover information about a given WMI class such as
# a help description, its methods and properties.
#
# The script will write a custom object with WMI information
# to the pipeline, or you can use -report to display an expanded 
# view of the class' methods and properties.

# This script cannot use alternate credentials to connect to remote
# computers. You must run it under an account that has admin
# privileges on the remote computer.

# DISCLAIMER AND WARNING:
# 	THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY
# 	KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# 	IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
#   TEST THOROUGHLY IN A NON-PRODUCTION ENVIRONMENT. IF YOU DON'T KNOW WHAT THIS
#   SCRIPT WILL DO...DO NOT RUN IT!
# 
# ====================================================================================

Param([string]$Class="Win32_OperatingSystem",
      [string]$computername=$env:computername,
      [string]$namespace="ROOT\CIMV2",
      [switch]$report
     )

#turn off the error pipeline
$errorActionPreference="SilentlyContinue"     

Trap [System.Management.Automation.PSInvalidCastException] {
#this traps errors attempting to retrieve the WMI class
    Write-Warning ("There was an error trying to get the {0}`
         class from the {1} namespace on {2}.` 
         {3}" -f $Class.ToUpper(),$namespace.ToUpper(),`
         $computername.ToUpper(),$($_.exception.message))
    Return
}

Trap {
#this will trap all other errors and let the script continue
  Continue
}

[WMICLASS]$wmi="\\{0}\{1}:{2}" -f $computername,$namespace,$Class

#set object to use amended qualifiers
$wmi.psbase.options.UseAmendedQualifiers=$true
 
#define an array for property names
$properties=@()
$wmi.psbase.properties | foreach {
    #add each property name to $properties
    $properties+=$_.name
  }

#define an array for method names
$methods=@()
$wmi.psbase.methods | foreach {
    #add each method name to $methods
    $methods+=$_.name
  }
#if no methods found set a new value
if ($methods.count -eq 0) {
    $methods="None"
}
  
#get class description
$description=$wmi.psbase.GetQualifierValue("description")

#if no description then define a new value
if (!$description) {
  $description= "No Description Found"
}

#create an empty custom object
$obj=New-Object PSObject
  
#assign properties
$obj | Add-Member -MemberType Noteproperty -name "Computername"
   -value $computername.ToUpper()
$obj | Add-Member -MemberType Noteproperty -name "Path" -value $wmi.path.path.ToUpper()
$obj | Add-Member -MemberType Noteproperty -name "Namespace" -value $namespace.ToUpper()
$obj | Add-Member -MemberType Noteproperty -name "WMIClass" -value $class.ToUpper()
$obj | Add-Member -MemberType Noteproperty -name "Description" -value $description
$obj | Add-Member -MemberType Noteproperty -name "Properties" -value $properties
$obj | Add-Member -MemberType Noteproperty -name "Methods" -value $methods

#if -report was specified display a formatted report
if ($report) {
    $obj | Format-List Path,WMIClass,Description,`
    @{label="Properties";Expression={$_.properties | Out-String}},`
    @{label="Methods";Expression={$_.Methods | Out-String}} 
} 
else {
    #otherwise, just write the object
    write $obj
}

#end of script

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