Clear-Item

Clears the contents of an item, but does not delete the item.
Clear-Item [-Path*] <String[]> [-Credential [<PSCredential>]] [-Exclude [<String[]>]] [-Filter [<String>]] [-Force][-Include [<String[]>]] [-Confirm] [-WhatIf] [-UseTransaction [<SwitchParameter>]] [<CommonParameters>]
Clear-Item [-Credential [<PSCredential>]] [-Exclude [<String[]>]] [-Filter [<String>]] [-Force] [-Include[<String[]>]] -LiteralPath* <String[]> [-Confirm] [-WhatIf] [-UseTransaction [<SwitchParameter>]][<CommonParameters>]

The Clear-Item cmdlet clears the content of an item, but it does not delete the item. For example, the Clear-Item cmdlet can delete the value of a variable, but it does not delete the variable. The value that used to represent a cleared item is defined by each Windows PowerShell provider. This cmdlet is similar to Clear-Content, but it works on aliases and variables, instead of files.

Parameters
-Credential [<PSCredential>]

Specifies a user account that has permission to perform this action. The default is the current user.

Type a user name, such as User01 or Domain01User01, or enter a PSCredential object, such as one generated by the Get-Credential cmdlet. If you type a user name, you will be prompted for a password.

This parameter is not supported by any providers installed with Windows PowerShell.

-Exclude [<String[]>]

Specifies, as a string array, items to exclude. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as *.txt. Wildcards are permitted.

-Filter [<String>]

Specifies a filter in the provider’s format or language. The value of this parameter qualifies the Path parameter. The syntax of the filter, including the use of wildcards, depends on the provider. Filters are more efficient than other parameters, because the provider applies them when the cmdlet gets the objects, rather than having Windows PowerShell filter the objects after they are retrieved.

-Force [<SwitchParameter>]

Indicates that the cmdlet clears items that cannot otherwise be changed, such as read- only aliases. The cmdlet cannot clear constants. Implementation varies from provider to provider.

-Include [<String[]>]

Specifies, as a string array, items to that this cmdlet clears. The value of this parameter qualifies the Path parameter. Enter a path element or pattern, such as *.txt. Wildcards are permitted.

-LiteralPath <String[]>

  • This value is required
  • Default value is None
  • Accepts pipeline input ByPropertyName

Specifies the path to the items being cleared. Unlike Path, the value of the LiteralPath parameter is used exactly as it is typed. No characters are interpreted as wildcards. If the path includes escape characters, enclose it in single quotation marks. Single quotation marks tell wps_2 not to interpret any characters as escape sequences.

-Path <String[]>

  • This value is required
  • Accepts pipeline input ByValue

Specifies the path to the items being cleared. Wildcards are permitted. This parameter is required, but the parameter name (Path) is optional.

-Confirm [<SwitchParameter>]

  • Default value is false

Prompts you for confirmation before running the cmdlet.Prompts you for confirmation before running the cmdlet.

-WhatIf [<SwitchParameter>]

  • Default value is false

Shows what would happen if the cmdlet runs. The cmdlet is not run.Shows what would happen if the cmdlet runs. The cmdlet is not run.

-UseTransaction [<SwitchParameter>]

  • Default value is false

Includes the command in the active transaction. This parameter is valid only when a transaction is in progress.

<CommonParameters>

This cmdlet supports the common parameters: Verbose, Debug,ErrorAction, ErrorVariable, WarningAction, WarningVariable,OutBuffer, PipelineVariable, and OutVariable.

Inputs

System.String

You can pipe a path string to this cmdlet.

Outputs

None

This cmdlet does not generate any output.

Examples
  1. Clear the value of a variable:
    PS C:> Clear-Item Variable:TestVar1
    -or-
    PS C:> Set-location Variable:
    PS Variable:>  Clear-Item TestVar1
    

    This command clears the value of the variable named TestVar1. The variable remains and is valid, but its value is set to null. The variable name is prefixed with Variable: to indicate the Windows PowerShell Variable provider.

    The alternate commands show that, to get the same result, you can switch to the Windows PowerShell Variable: drive and then run the Clear-Item command.

  2. Clear all registry entries:
    PS C:> Clear-Item HKLM:SoftwareMyCompanyMyKey -Confirm
    

    This command clears all registry entries in the MyKey subkey, but only after prompting you to confirm your intent. It does not delete the MyKey subkey or affect any other registry keys or entries. You can use the Include and Exclude parameters to identify particular registry keys, but you cannot use them to identify registry entries. To delete particular registry entries, use the Remove-ItemProperty cmdlet. To delete the value of a registry entry, use the Clear-ItemPropertycmdlet.

Additional Notes
 The Clear-Item cmdlet is supported only by several Windows PowerShell providers, including the Alias, 
 Environment, Function, Registry, and Variable providers. As such, you can use Clear-Item to delete the content 
 of items in the provider namespaces.

 You cannot use Clear-Item to delete the contents of a file, because the Windows PowerShell FileSystem provider 
 does not support this cmdlet. To clear files, use the Clear-Content.

 You can also refer to Clear-Item by its built-in alias, cli. For more information, type Get-Help about_Aliases.

 The Clear-Item cmdlet is designed to work with the data exposed by any provider. To list the providers 
 available in your session, type "Get-PsProvider". For more information, see about_Providers.
Related Links

Copy-Item
Get-Item
Invoke-Item
Move-Item
New-Item
Remove-Item
Rename-Item
Set-Item