How to pass -Verbose parameter to a function called inside Invoke-Command? - powershell

Question

I have the following function that I am trying to invoke remotely with verbose output, but I don't know how to pass the VerbosePreference correctly?
function TestVerbose()
{
[CmdletBinding()]
Param()
Write-Output "output test"
Write-Verbose "verbose test"
}
Invoke-Command -ComputerName computerB -ScriptBlock ${function:TestVerbose}
The question How to Write-Verbose from Invoke-Command? nicely describes how to write something verbose if I have a non-function scriptblock:
Invoke-Command -ComputerName computerB {$VerbosePreference='Continue'; Write-Verbose "verbose test"}
However, I would like to pass a function and also indicate verbose preference. How to do that?
I have tried combining the function with some inline scriptblock, but it makes the function not run at all:
Invoke-Command -ComputerName computerB -ScriptBlock {$VerbosePreference='Continue'; ${function:TestVerbose}}

Answer 1

kind of a workaround. store the current value of verbosepreference , change it in your function and then reset to original value.
function TestVerbose()
{
[CmdletBinding()]
Param()
begin
{
$VerbosePreference_original = $VerbosePreference
$VerbosePreference = 'continue'
Write-Verbose ('Begin:Original value of VerbosePreference : {0}' -f $VerbosePreference_original)
Write-Verbose ('Begin:New value of VerbosePreference : {0}' -f $VerbosePreference)
}
process
{
Write-Output 'output test'
Write-Verbose 'output test'
}
end
{
Write-Verbose ('END:ReSetting value of VerbosePreference to default : {0}' -f $VerbosePreference_original)
$VerbosePreference = $VerbosePreference_original
}
}