Why 'Accept wildcard characters' is always false for every parameter

This topic contains 3 replies, has 3 voices, and was last updated by Profile photo of SavindraSingh Shahoo SavindraSingh Shahoo 3 weeks, 4 days ago.

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  • #54600

    Hello Experts,

    This question is there in my mind since a while. I am not able to find an answer to the same yet.

    When you go through help topic for any PowerShell Cmdlet with -Full parameter, you will see 'Accept wildcard characters? false' under the PARAMETER details under each parameter.

    So far I have not seen it as set to True in any case. Can someone please explain what it is and why it is always false, even when it was supposed to be true. For example, when you look at help for Get-Command Cmdlet, the -Name parameter accepts wildcards for searching for any Cmdlet. But, even for this parameter, it shows 'Accept wildcard characters? false'.

    Please help me understand this.

  • #54603
    Profile photo of Rob Simmers
    Rob Simmers

    To set the switch to True, you need to use:


    To implement the wildcard (globbing) switch, the cmdlet look like it needs to be written in C#. For advanced function, I've never seen a way to set that parameter value. I do see some folks asking for it:


    I've done cmdlets that do wildcard searches and I just ensure the HELP and COMMENTS indicate that it supports wildcard searches, because in my SQL statement I'm simply doing a LIKE versus a = and replace * with %. A poor implementation, I'm not sure, but from an advanced function standpoint I haven't see a better way to do it. It may be easier to just update the help and comment documentation versus doing the entire wildcard implementation just to flip the switch to true.

    • #54634

      Thank you for the inputs.

      That sounds strange. I was under impression that while using with command parameters, only '*' and '?' are considered wildcard characters. Thus I was expecting (for example) the -Name parameter in Get-Command should be shown as True in below output:

          -Name []
              Specifies an array of names. This cmdlet gets only commands that have the specified name. Enter a name or name pattern. Wildcard characters 
              are permitted.
              To get commands that have the same name, use the All parameter. When two commands have the same name, by default, Get-Command gets the 
              command that runs when you type the command name.
              Required?                    false
              Position?                    1
              Default value                None
              Accept pipeline input?       True (ByValue, ByPropertyName)
              Accept wildcard characters?  false

      There should be some way to do this using Parameter Decorator in advance functions.

  • #54606
    Profile photo of Olaf Soyk
    Olaf Soyk

    I'm not completely sure if I got what you mean but when I run

    Get-Help Get-Command -Full

    on my Windows 7 client with the PSVersion 5.0.10586.117 I get following output in the PARAMETERS section:

    -Name []
        Specifies an array of names. This cmdlet gets only commands that have the specified name. Enter a name or name pattern. Wildcard characters are permitted.

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