CODEWITHSUNDEEP
powershellrename
Rayearth
Rayearth

Reputation: 234

PowerShell command to add character to filename at specific position

I'd like to add underscore character "_" at position 22 of a filename. What would be the PowerShell command to do it?

Upvotes: 2

Views: 12737

Answers (3)

Sonoo Kumar
Sonoo Kumar

Reputation: 56

below script will add '-' at position 3 and 6 and 9 and 12 and 15

from: s270120070336.bmp

to: s27-01-20-07-03-36.bmp

Get-ChildItem -Path 'C:\users\sonook\desktop\screenshot' -Filter '*.bmp' | 

ForEach-Object { $_ | Rename-Item -NewName {$_.BaseName.insert(3,'-').insert(6,'-').insert(9,'-').insert(12,'-').insert(15,'-') + $_.Extension}}

Upvotes: 0

Martin Brandl
Martin Brandl

Reputation: 58931

You could use -replace and a simple regex to achieve that.

In the following example, I first retrieve the file using the Get-Item cmdlet and rename it using Rename-Item: 

Get-Item $YOURPATH | % { $_ | Rename-Item -NewName ($_.Name -replace '^([\S\s]{22})', '$1_')}

You may have to add a check whether the file name is long enough, otherwise it could happen, that you rename the file extension or nothing...

Upvotes: 1

Kiran Reddy
Kiran Reddy

Reputation: 2904

alternately you can also make use of the string method insert

Get-Item -Path $Path | 
  Rename-Item -NewName {$_.BaseName.insert(22,'_') + $_.Extension} -WhatIf

note: remove -whatif to apply the rename

Upvotes: 5

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