Creating a parameter script with PowerShell to be called by another script - powershell

Question

I have a PowerShell script that works. For maintenance reasons I want to create another script where I'll put all the parameters that I'll call from my first script.
How can I create and call the parameter file?
Here is my script:
param([string] $dataSource = "server")
$Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")
$Stamp1 = (Get-Date).toString("yyyy-MM-dd")
$Logfile = "E:\PowerShell\Log\file$stamp1.log"
$file = "file$stamp1.csv"
$extractFile = #"
E:\PowerShell\Output\$file
"#
[string]$sqlCommand1 =get-content -path E:\PowerShell\SQL\sql.sql
[string]$sqlCommand =$sqlCommand1
$authentication = ("User Id= user ;Password=pswd;" -f $plainCred.Username, $plainCred.Password)
Add-Type -assemblyname system.data
$factory = [System.Data.Common.DbProviderFactories]::GetFactory ("Teradata.Client.Provider")
$connection = $factory.CreateConnection()
$connection.ConnectionString = "Data Source = $dataSource;Connection Pooling Timeout=300;$authentication"
$connection.Open()
if ($connection.State -eq 'Open') {$logstring ="Connexion réussite"} else { $logstring ="echec Connexion" }
$command = $connection.CreateCommand()
$command.CommandText = $sqlCommand
$adapter = $factory.CreateDataAdapter()
$adapter.SelectCommand = $command
$dataset = new-object System.Data.DataSet
try
{
[void] $adapter.Fill($dataset)
$dataset.Tables | Select-Object -Expand Rows
}
finally
{
$connection.Close()
}
if (!$dataset) {$logstring1 ="extraction vide"} else {$logstring1 ="extraction réussite"}
($DataSet.Tables[0] | ConvertTo-Csv -delimiter ";" -NoTypeInformation ) -replace '"', "" | Out-File $extractFile -Force
$datafileExists = Test-Path $extractFile
if ($datafileExists)
{
$logstring2 ="Fichier data créé"
}
else
{
$logstring2 ="Fichier data non créé"
}
Add-content $Logfile -value ($Stamp+':'+$logstring)
Add-content $Logfile -value ($Stamp+':'+$logstring1)
Add-content $Logfile -value ($Stamp+':'+$logstring2)
I created a file of parameters
$Stamp1 = (Get-Date).toString("yyyy-MM-dd")
$Logfile = "E:\PowerShell\Log\file$stamp1.log"
$file = "file$stamp1.csv"
$extractFile = #"
E:\PowerShell\Output\$file
"#
$authentication = ("User Id= user ;Password=paswd;" -f $plainCred.Username, $plainCred.Password)
$Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")
and I call it from my first script like that :
$ScriptPath = Split-Path $MyInvocation.InvocationName
& "$ScriptPath\param.ps1"
but my variables are not recognised, I have these errors:
Out-File : Cannot bind argument to parameter 'FilePath' because it is null.
At E:\PowerShell\script\Soft.ps1:59 char:104
+ ... "" | Out-File $extractFile -Force
+ ~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Out-File], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.OutFileCommand
Test-Path : Cannot bind argument to parameter 'Path' because it is null.
At E:\PowerShell\script\Soft.ps1:61 char:29
+ $datafileExists = Test-Path $extractFile
+ ~~~~~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Test-Path], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.TestPathCommand
Add-Content : Cannot bind argument to parameter 'Path' because it is null.
At E:\PowerShell\script\Soft.ps1:78 char:14
+ Add-content $Logfile -value ($Stamp+':'+$logstring)
+ ~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Add-Content], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddContentCommand
Add-Content : Cannot bind argument to parameter 'Path' because it is null.
At E:\PowerShell\script\Soft.ps1:79 char:13
+ Add-content $Logfile -value ($Stamp+':'+$logstring1)
+ ~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Add-Content], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddContentCommand
Add-Content : Cannot bind argument to parameter 'Path' because it is null.
At E:\PowerShell\script\Soft.ps1:80 char:13
+ Add-content $Logfile -value ($Stamp+':'+$logstring2)
+ ~~~~~~~~
+ CategoryInfo : InvalidData: (:) [Add-Content], ParameterBindingValidationException
+ FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.PowerShell.Commands.AddContentCommand

Answer 1

IF you use '&' you execute the ps1 and the variables created are available within that scope. you can change the scope like this:
$test # default scope
$global:test # global scope
$script:test # script scope
The better solution is to use '.' in stead of '&' so you 're code from the ps1 is included in the other ps1.
so the scope is in the same because it is in the same script.