Powershell: Generate a random Alphanumeric string

psRandomString.psm1

# Generate a random Alphanumeric string
Function Get-RandomString {
    
    [CmdletBinding()]
    Param (
        [int] $length = 8,
        [switch]$alphabet,
        [switch]$number,
        [switch]$symbol
    )

    Begin{
        [int[]] $charset =@();
        if($alphabet){
            $charset += (0x41 .. 0x5A) + (0x61 .. 0x7A) 
            #       ("A"  .. "Z" ) + ("a"  .. "z" )
        }
        if($number){
            $charset += (0x30 .. 0x39)
            #       ("0"  .. "9" )
        }
        if($symbol){
            $charset += (0x20 .. 0x2F) + (0x3A .. 0x40) + (0x5B .. 0x60) + (0x7B .. 0x7E) 
            #       (" "  .. "/" ) + (":"  .. "@" ) + ("["  .. "``") + ("{"  .. "~" )
        }
        if($charset.Length -eq 0){
            $charset += (0x30 .. 0x7E) 
        }
    }

    Process{
        Write-Output ( -join ((0..$length) | %{[char]($charset | Get-Random)}) )
    }	
}
Export-ModuleMember -Function Get-RandomString