Author Posts

January 28, 2015 at 11:38 am

Hi Everyone!

I'm very new to PowerShell and been trying to use PS to gather information computer information.

The command below is to gather Ethernet NIC name and Macaddresses and it's doing it. Awesome!

Get-WmiObject win32_networkadapter -Filter "adaptertype='ethernet 802.3'" | Select name,macaddress

But i added a -replace to change the format of the macaddress ":" to "-". Thing is, when i test run it, it is not showing name of the NIC anymore.

Get-WmiObject win32_networkadapter -Filter "adaptertype='ethernet 802.3'" | Select name,macaddress | foreach {$_.macaddress -replace ":","-"}

What am I missing? Thanks for in advance!

January 28, 2015 at 12:14 pm

Hi Kungfumang,

It's because at the end of the pipeline, you are just telling it to display the mac address. Unless Select is at the end of a pipeline, all it will do is to select the specified properties from the previous action, and pass them through to the next item in the pipeline.

Instead, you want to do something like this, which uses a calculated property in the format you require.

Get-WmiObject -Class win32_networkadapter -Filter "adaptertype='ethernet 802.3'" |
Select-Object -Property name, @{
    Name       = 'MACaddress'
    Expression = {
        $_.macaddress -replace ':', '-'

January 28, 2015 at 12:20 pm


Thank you very much for the very fast response. Your format works perfectly!