Renaming files using powershell

Question

i have files in following format: Starts with 400 or Z400

40011111.mus
40011112.mus
Z40011112.mus

I need to rename as following: Starts with Z100

Z10011111.mus
Z10011112.mus
Z10011112.mus

Currently i have the following powershell function. but it adds Z as prefix. how do i undate the code so that it adds Z when necessary and changes 400 to 100?

function renameFiles{
    echo " Start Rename Files" 
    get-childitem -path $mapfolder | 
        Where-Object {$_.extension -eq ".ditamap"} | 
        foreach-object {
           echo "  Renaming: $_ --> Z$_"
           ren "$mapfolder\$_" "$mapfolder\Z$_"
    }
}

Jason Morgan · Accepted Answer · 2014-05-21 15:30:53Z

1

Don't use echo and look at using something, like if or switch to handle the various situations:

function Rename-DitmapFile { get-childitem -path $mapfolder -Filter *.ditmap | foreach-object { switch ($_) { {$_.name.startswith('4')} {Rename-Item -Path $_.FullName -NewName ($_.Name -replace '4','Z1')} {$_.name.startswith('Z4')} {Rename-Item -Path $_.FullName -NewName ($_.Name -replace 'Z4','Z1')} } } }

answered May 21, 2014 at 15:30

Jason Morgan

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1 Comment

user1749707 Over a year ago

It is not working if the file name is 40014001.mus. It is changed to Z10011001

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