convert string to character powershell

Question

I'm trying to build a tool that creates a bootable usb and assign a free drive letter I found here a useful script and did some modification to it

$freeletter = get-wmiobject win32_logicaldisk | select -expand DeviceID -Last 1 | % { [char]([int][char]$_[0]  + 1) + $_[1] }
$splitted = $freeletter -split ":"
[char]$splitted

now I have the free drive letter stored in "$splitted" variable but when I run the following command

New-Partition -DiskNumber $disknumber -UseMaximumSize -IsActive:$true -DriveLetter $splitted

I receive the following error:

New-Partition : Cannot process argument transformation on parameter 'DriveLetter'. Cannot convert the "System.String[]" value of type "System.String[]" to type 
"System.Char".

any suggestion please

Martin Brandl · Accepted Answer · 2016-10-13 09:07:53Z

1

You can simplify it and determine $freeletter like this:

[char]$freeletter = (get-wmiobject win32_logicaldisk | select -expand DeviceID -Last 1)[0]

answered Oct 13, 2016 at 9:07

Martin Brandl

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