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Getting selected value of a parameter to provide values for next parameter in Powershell

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1

I am writing a function where I am planning to provide dynamic parameter auto-completion. Idea is this;

When I type

Activate -User <USERNAME> (-User gets auto-completed by GetUsers class)

I wanna use <USERNAME> selected by -User parameter in GetValidValues method of GetProfiles class so I can dynamically determine what user directory I should be searching profile files in, since every user would have different profile files path.

I haven't been able to find a mechanism where I would get any selected value of any parameters. I am using PS6 and I was wondering if there is a way to do this. Here is my minimal code.

class GetUsers : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # I simply return the user array here, no big deal
 return [string[]] $usersArray
 

class GetProfiles : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # Here I need to get what value is selected for $User parameter
 # of the function below, so I can populate $profileArray for selected
 # user
 return [string[]] $profileArray
 

function global:Activate()

 [CmdletBinding()]
 Param
 (
 [ValidateSet([GetUsers])]
 [string]$User="",
 [ValidateSet([GetProfiles])]
 [string]$Profile="",
 )
 # do business as usual
 Write-Host $User
 Write-Host $Profile

Thanks!

powershell parameters powershell-core validateset

share|improve this question

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you familiar with ArgumentCompleter or its associated attribute?
  
  – TheIncorrigible1
  Mar 26 at 16:07
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  PSv6 is powershell-core, you should switch to that tag.
  
  – LotPings
  Mar 26 at 16:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @TheIncorrigible1 Nope, I am quite new in PS world. Checking ArgumentCompleter now. Thank you!
  
  – verte
  Mar 26 at 16:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @LotPings Turns out Mike has already edited it. Thank you Mike too!
  
  – verte
  Mar 26 at 16:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Just curious as to why you choose class verses the built-in DynamicParameter approach for a validateset / param completion.
  
  – postanote
  Mar 26 at 21:36
  

  
  
  
  

 | 
show 3 more comments

1

I am writing a function where I am planning to provide dynamic parameter auto-completion. Idea is this;

When I type

Activate -User <USERNAME> (-User gets auto-completed by GetUsers class)

I wanna use <USERNAME> selected by -User parameter in GetValidValues method of GetProfiles class so I can dynamically determine what user directory I should be searching profile files in, since every user would have different profile files path.

I haven't been able to find a mechanism where I would get any selected value of any parameters. I am using PS6 and I was wondering if there is a way to do this. Here is my minimal code.

class GetUsers : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # I simply return the user array here, no big deal
 return [string[]] $usersArray
 

class GetProfiles : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # Here I need to get what value is selected for $User parameter
 # of the function below, so I can populate $profileArray for selected
 # user
 return [string[]] $profileArray
 

function global:Activate()

 [CmdletBinding()]
 Param
 (
 [ValidateSet([GetUsers])]
 [string]$User="",
 [ValidateSet([GetProfiles])]
 [string]$Profile="",
 )
 # do business as usual
 Write-Host $User
 Write-Host $Profile

Thanks!

powershell parameters powershell-core validateset

share|improve this question

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you familiar with ArgumentCompleter or its associated attribute?
  
  – TheIncorrigible1
  Mar 26 at 16:07
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  PSv6 is powershell-core, you should switch to that tag.
  
  – LotPings
  Mar 26 at 16:23
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @TheIncorrigible1 Nope, I am quite new in PS world. Checking ArgumentCompleter now. Thank you!
  
  – verte
  Mar 26 at 16:32
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @LotPings Turns out Mike has already edited it. Thank you Mike too!
  
  – verte
  Mar 26 at 16:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Just curious as to why you choose class verses the built-in DynamicParameter approach for a validateset / param completion.
  
  – postanote
  Mar 26 at 21:36
  

  
  
  
  

 | 
show 3 more comments

I am writing a function where I am planning to provide dynamic parameter auto-completion. Idea is this;

When I type

Activate -User <USERNAME> (-User gets auto-completed by GetUsers class)

I wanna use <USERNAME> selected by -User parameter in GetValidValues method of GetProfiles class so I can dynamically determine what user directory I should be searching profile files in, since every user would have different profile files path.

I haven't been able to find a mechanism where I would get any selected value of any parameters. I am using PS6 and I was wondering if there is a way to do this. Here is my minimal code.

class GetUsers : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # I simply return the user array here, no big deal
 return [string[]] $usersArray
 

class GetProfiles : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # Here I need to get what value is selected for $User parameter
 # of the function below, so I can populate $profileArray for selected
 # user
 return [string[]] $profileArray
 

function global:Activate()

 [CmdletBinding()]
 Param
 (
 [ValidateSet([GetUsers])]
 [string]$User="",
 [ValidateSet([GetProfiles])]
 [string]$Profile="",
 )
 # do business as usual
 Write-Host $User
 Write-Host $Profile

Thanks!

powershell parameters powershell-core validateset

share|improve this question

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

class GetUsers : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # I simply return the user array here, no big deal
 return [string[]] $usersArray
 

class GetProfiles : System.Management.Automation.IValidateSetValuesGenerator

 [String[]] GetValidValues()
 
 # Here I need to get what value is selected for $User parameter
 # of the function below, so I can populate $profileArray for selected
 # user
 return [string[]] $profileArray
 

function global:Activate()

 [CmdletBinding()]
 Param
 (
 [ValidateSet([GetUsers])]
 [string]$User="",
 [ValidateSet([GetProfiles])]
 [string]$Profile="",
 )
 # do business as usual
 Write-Host $User
 Write-Host $Profile

share|improve this question

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

share|improve this question

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

edited Mar 26 at 16:27

Mike Shepard

13.4k66 gold badges4141 silver badges5858 bronze badges

asked Mar 26 at 15:57

verteverte

1911 bronze badge

asked Mar 26 at 15:57

verteverte

1911 bronze badge