Powershell - Rename filename by removing the last few characters

Question

I want to remove the last 11 characters of multiple files names. For example I have these file names:

ABCDE_2015_10_20
HIJKL_2015_10_20
MNOPQ_2015_10_20
RSTUV_2015_10_20

would like to rename them to

ABCDE
HIJKL
MNOPQ
RSTUV

I have tried using the follwing code:

Get-ChildItem 'E:\Thomson Reuters\Stage' | rename-item -newname { [string]($_.name).substring($_.name.length -14) } 

Can anybody tell me where I am going wrong?

Answer 1

You're almost there, you just need to tell substring exactly where to start and end:

Get-ChildItem 'E:\Thomson Reuters\Stage' | rename-item -newname { $_.name.substring(0,$_.name.length-11) } 

By passing two integers to substring you give it the StartIndex and Length of the string you want to capture. See here for the documentation