If I have 10 *.csv files in a folder, I would like to create an out-file as D:\10.txt I cannot get the syntax right, here's my last attempt:
(Get-ChildItem 'D:\Data\' -File -Include *.csv).Count | Out-File -filepath "D:\test$($_).txt"
I prefer a oneliner due to another system that must call this.
Can somebody help me please ? Many thanks !
The automatic $_ variable - representing the current input object in each step of a pipeline - can only be used in arguments that are script blocks ({ ... }), not in expandable strings ("...").
A per-input-object script block is most typically used with the ForEach-Object cmdlet, but you can also use it as a delay-bind script-block parameter with pipeline-binding parameters.
While that doesn't work with Out-File, it does with Set-Content, which is generally the right tool to use with strings anyway:
(Get-ChildItem D:\Data -File -Filter *.csv).Count |
Set-Content -LiteralPath { "D:\test$_.txt" }
Note that I've replaced -Include with -Filter, which is not only more efficient, but also avoids the pitfall of -Include only applying to the input directory path, not to the items inside it - see this GitHub issue.
Caveat: In Windows PowerShell - but fortunately no longer in PowerShell Core, where (BOM-less) UTF-8 is now consistently used - Out-File and Set-Content use different character encodings by default: UTF-16LE ("Unicode") vs. the system's active ANSI code page ("Default"); use the -Encoding parameter to specify the desired encoding, as needed.
I try with this
$files = Get-ChildItem 'D:\Data\*.csv'
$CountFile = $files.Count
touch "D:\$($CountFile).txt
I tried with a powershell emulator from Ubuntu, I hope this can help you. Greeting from Argentina
