Built-in cmdlet

Where-Object cmdlet

Where-Object is documented in the Microsoft.PowerShell.Core module. Consult the linked reference for syntax and parameters.

Availability: Windows PowerShell 5.1, PowerShell 7.x中文

Syntax

Where-Object [-FilterScript] <scriptblock>

This is a practical syntax summary, not every parameter set. Run Get-Command Where-Object -Syntax and Get-Help Where-Object -Full in the installed version for its complete syntax and parameter metadata. Common parameters and -WhatIf/-Confirm support depend on the command and PowerShell version.

Examples

Example usage of Where-Object.

Get-Service | Where-Object Status -eq 'Running'

Read all available parameter sets and help for the installed module.

Get-Help Where-Object -Full

Parameters, options and clauses

Option / clauseDescription
-FilterScript <scriptblock>Evaluate a condition for each incoming object.
-Property <name>Select a property for simplified comparison syntax.
-EQ / -NE / -GT / -GE / -LT / -LEChoose a comparison operator in simplified syntax.
-VerboseWrite additional diagnostic detail to the verbose stream.
-DebugWrite debugging messages to the debug stream.
-ErrorAction <action>Control how a non-terminating error is handled.
-ErrorVariable <name>Store error records in a variable.
-WarningAction <action>Control how warnings are handled.
-WarningVariable <name>Store warning messages in a variable.
-InformationAction <action>Control how information messages are handled.
-InformationVariable <name>Store information messages in a variable.
-OutVariable <name>Store output in a variable as well as sending it onward.
-OutBuffer <count>Set the number of objects to collect before the next command runs.
-PipelineVariable <name>Store the current pipeline object in a variable during processing.
-ProgressAction <action>Control progress reporting in versions that support this parameter.
-WhatIf / -ConfirmRisk-control parameters available only on commands that support ShouldProcess.

Related PowerShell references

Safety note

Review a command and its target before running it. Commands that alter files, services, accounts, disks, permissions or databases may be difficult to reverse. Test in a safe environment and keep backups.

Official reference ↗Back to directory