Powershell - create module - how to specify empty argument

Try this:

function Get-RMGroupMembers  
{
	[cmdletbinding()]
        
    param(
    [Parameter(
        Mandatory = $true,
        Position = 0,
        HelpMessage = "Name of the group"
    )]
    [string]
    $name
    )
    if(!(Get-QADGroup $name)){Write-Error "Group cannot be found!"}
    else{
	   Get-QADGroup $name | Get-QADGroupMember | Select-Object -Property name
    }
}

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Isnt there possibility to use it without cmdletbinding I am actually not sure how does it work, when I run it It takes really long time and stops and I get this error:  "WARNING: This search was configured to retrieve only the first 1000 results"  I know its possible to extend. Wouldnt be possible to use the normal function?

Many thanks

If you validate the value entered into the parameter you can stop people passing empty values ("") which will lead to it returning all groups.

If you want it to explicitly check the group name, include the -Name parameter on Get-QADGroup. If you want more control, shift to LDAP filter.

function Get-RMGroupMembers  {
  Param(
    [Parameter(Mandatory = $true, Position = 0,  HelpMessage = "Name of the group")]
    [ValidateNotNullOrEmpty()]
    [string]$Name
  )

  if(!(Get-QADGroup $name)) { 
    Write-Error "Group cannot be found!"
  } else {
    Get-QADGroup $name | Get-QADGroupMember | Select-Object -Property name
  }
}

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Chris

Thanx, and I dont understand one thing, if I import-module etc.. and paste there 'Get-RMGroupMembers'  what calls that inputbox.

I easily dont understand this part.

Param(
    [Parameter(Mandatory = $true, Position = 0,  HelpMessage = "Name of the group")]
    #[ValidateNotNullOrEmpty()]
    [string]$Name
  )

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The cmdletbinding version will not let you give more parameters than expected. Without cmdletbinding extra parameter values will go into the $args array. This is basically the only difference.

This one?

Supply values for the following parameters:
(Type !? for Help.)

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It appears because Mandatory is set to $True.

Chris

Thanks a lot guys,

Please and other parameters?

 Position = 0,  HelpMessage = "Name of the group"  ,

And how would you do that without without that parameters?

Something like, if I play only (without any group name )"Get-RMGroupMembers" then it will write-host -- please enter the parameter. I am just curious.

And then let me accept solution for both of you.

BR

You can do all of it without the Param block, whether you do or not depends on how you want the application to run. e.g.

Function Test-Param {
  Param(
    $Name
  )

  While (!$Name) {
    $Name = Read-Host -Prompt "You must tell me a name"
  }

  Write-Host "I have a value for name: $Name"
}

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Chris

Thx