Format-List

Format-List
    [[-Property] <Object[]>]
    [-GroupBy <Object>]
    [-View <string>]
    [-ShowError]
    [-DisplayError]
    [-Force]
    [-Expand <string>]
    [-InputObject <psobject>]
    [<CommonParameters>]

The Format-List cmdlet formats the output of a command as a list of properties in which each property is displayed on a separate line. You can use Format-List to format and display all or selected properties of an object as a list (Format-List -Property *).

Because more space is available for each item in a list than in a table, PowerShell displays more properties of the object in the list, and the property values are less likely to be truncated.

Get-Service | Format-List

This command formats information about services on the computer as a list. By default, the services are formatted as a table. The Get-Service cmdlet gets objects representing the services on the computer. The pipeline operator (|) passes the results through the pipeline to Format-List. Then, the Format-List command formats the service information in a list and sends it to the default output cmdlet for display.

These commands display information about the PS1XML files in the PowerShell directory as a list.

$A = Get-ChildItem $PSHOME\*.ps1xml
Format-List -InputObject $A

The first command gets the objects representing the files and stores them in the $A variable.

The second command uses Format-List to format information about objects stored in $A. This command uses the InputObject parameter to pass the variable to Format-List, which then sends the formatted output to the default output cmdlet for display.

This command displays the name, base priority, and priority class of each process on the computer.

Get-Process | Format-List -Property Name, BasePriority, PriorityClass

It uses the Get-Process cmdlet to get an object representing each process. The pipeline operator (|) passes the process objects through the pipeline to Format-List. Format-List formats the processes as a list of the specified properties. The Property parameter name is optional, so you can omit it.

This command displays all the properties of the Winlogon process.

Get-Process winlogon | Format-List -Property *

It uses the Get-Process cmdlet to get an object representing the Winlogon process. The pipeline operator (|) passes the Winlogon process object through the pipeline to Format-List. The command uses the Property parameter to specify the properties and the * to indicate all properties. Because the name of the Property parameter is optional, you can omit it and type the command as Format-List *. Format-List automatically sends the results to the default output cmdlet for display.

The following examples show of the results of adding the DisplayError or ShowError parameters with an expression.

PC /> Get-Date | Format-List DayOfWeek,{ $_ / $null } -DisplayError

DayOfWeek    : Friday
 $_ / $null  : #ERR

PC /> Get-Date | Format-List DayOfWeek,{ $_ / $null } -ShowError

DayOfWeek    : Friday
 $_ / $null  :

Failed to evaluate expression " $_ / $null ".
+ CategoryInfo          : InvalidArgument: (12/21/2018 7:59:23 AM:PSObject) [], RuntimeException
+ FullyQualifiedErrorId : PSPropertyExpressionError

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutBuffer, -OutVariable, -PipelineVariable, -ProgressAction, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.

You can pipe any object to this cmdlet.

This cmdlet returns the format objects that represent the list.

Windows PowerShell includes the following aliases for Format-List:

• fl

The format cmdlets, such as Format-List, arrange the data to be displayed but do not display it. The data is displayed by the output features of PowerShell and by the cmdlets that contain the Out verb (the Out cmdlets), such as Out-Host or Out-File.

If you do not use a format cmdlet, PowerShell applies that default format for each object that it displays.

The View parameter lets you specify an alternate format for the table. You can use the views defined in the *.format.ps1xml files in the PowerShell directory, or you can create your own views in new PS1XML files and use the Update-FormatData cmdlet to include them in PowerShell.

The alternate view for the View parameter must use the list format, otherwise, the command fails. If the alternate view is a table, use Format-Table. If the alternate view is not a list or a table, use Format-Custom.

If you want to use Format-List with the Property parameter, you need to include the Force parameter under any of the following conditions:

• The input objects are formatted out-of-band using the ToString() method. This applies to [string] and .NET primitive types that are a superset of the built-in numeric types such as [int], [long], and others.

• The input objects have no public properties.

• The input objects are instances of the wrapper types PowerShell uses for output streams other than the Success output stream. This applies only when these wrapper types are sent to the Success output stream, which requires either having captured them via common parameters such as ErrorVariable first or using a redirection such as *>&1.

  • The wrapper types include:

    • System.Management.Automation.ErrorRecord
    • System.Management.Automation.WarningRecord
    • System.Management.Automation.VerboseRecord
    • System.Management.Automation.DebugRecord
    • System.Management.Automation.InformationRecord