Azure Powershell - iterate through a list (txt) with db names and set them as variables in script - azure

Question

I have the following challenge at the Moment:
With T-SQL I created a list of databases attached to our SQL instance and put this list in a txt file, so far no Problem.
Now with PowerShell I want to set up LongTermRetention backups in Azure with following cmdlet:
Set-AzSqlDatabaseBackupLongTermRetentionPolicy -ServerName $serverName -DatabaseName [name of database] -ResourceGroupName $resourceGroup -WeeklyRetention P53W -MonthlyRetention P48M -YearlyRetention P10Y -WeekOfYear 52
(I checked the Syntax of the cmdlet by inserting a database name manually and it works)
the variables given are set prior (ServerName, resourceGroup)
Where I am struggling now is, how I can get the names of the txt file one after another as parameter "DatabaseName" into my cmdlet, as I have never done something like this.
I would be very grateful for either a link on how to do this or maybe a solution posted here.
Thank you in advance and Kind regards
EDIT: I found a solution, Maybe not the most elegant, but working:
$files = Get-Content "C:\DEV\testfile.txt"
foreach ($file in $files){
Set-AzSqlDatabaseBackupLongTermRetentionPolicy -ServerName $serverName -DatabaseName $file -ResourceGroupName $resourceGroup -WeeklyRetention P53W -MonthlyRetention P48M -YearlyRetention P10Y -WeekOfYear 52
}
I haven't thought it might have been that easy.

Answer 1

If you have a flat text file where your database names are present like this:
server1
server2
server3
......
You can use the Get-Content cmdlet to read the file and iterate over each line using the ForEach-Object cmdlet. You can access the current item using $_ ($_ represents the current value in the pipeline):
Get-Content -Path 'pathToYourFile.txt' | ForEach-Object {
Set-AzSqlDatabaseBackupLongTermRetentionPolicy `
-ServerName $_ `
-DatabaseName [name of database] `
-ResourceGroupName $resourceGroup `
-WeeklyRetention P53W `
-MonthlyRetention P48M `
-YearlyRetention P10Y `
-WeekOfYear 52
}