PerformanceCounters/Test-PerformanceCounter.ps1
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# Copyright 2012 Aaron Jensen # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. function Test-PerformanceCounter { <# .SYNOPSIS Tests if a performance counter exists. .DESCRIPTION Returns `True` if counter `Name` exists in category `CategoryName`. `False` if it does not exist or the category doesn't exist. .EXAMPLE Test-PerformanceCounter -CategoryName 'ToyotaCamry' -Name 'MilesPerGallon' Returns `True` if the `ToyotaCamry` performance counter category has a `MilesPerGallon` counter. `False` if the counter doesn't exist. #> [CmdletBinding()] param( [Parameter(Mandatory=$true)] [string] # The category's name where the performance counter exists. Or might exist. As the case may be. $CategoryName, [Parameter(Mandatory=$true)] [string] # The performance counter's name. $Name ) if( (Test-PerformanceCounterCategory -CategoryName $CategoryName) ) { return [Diagnostics.PerformanceCounterCategory]::CounterExists( $Name, $CategoryName ) } return $false } |