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Powershell pipe in string

I tried to rename some files using powershell script below

 powershell.exe "& { Get-ChildItem *.txt | Rename-Item -NewName { $_.name -Replace '.txt','.csv' } }"

But it $_.name

appears to be parsed when executed "& command"

, so it complains that it doesn't know .name

(with already removed $_

). Doing this without the outer line solves the problem, but for other reasons it is not possible in my case.

How to avoid $_.name

?

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3 answers


This works great:



powershell.exe "& { Get-ChildItem *.txt | Rename-Item -NewName { `$_.name -Replace '.txt','.csv' } }"
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I don't see anything wrong with your original command, but personally I would use Path.ChangeExtension

instead-replace 

powershell.exe -command "& {Get-ChildItem *.txt | Rename-Item -NewName { [io.path]::ChangeExtension($_.name, 'csv') }}"


Or as you seem to be calling PowerShell from the command line, you can just use the "rename" command (and not use PowerShell at all):

ren *.txt *.csv
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powershell.exe "& {
    Get-ChildItem -Filter *.txt | ForEach-Object {`$_.Name}
}"

Backticks triggers special characters in PowerShell strings

`
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