Test-Connection question

I have this script that allows you to enter a ComputerName into the field, and it pings it and tells you if it’s online or offline and if it’s online, what the IP Address is. I would also like the option where I can enter an IP address and it’ll return the Computer name. I’ve got all the parts created, I just need help on only returning the Computername if the IP is entered, and vice versa. I know “OR” isn’t a valid statement here, but I just added it to show what I’m trying to accomplish.

Basically, I want it to do this:

If an IP address is entered for $IPorComputerName, return the computername.
If Computername is entered for $IPorComputerName, return the IP address.
If no connection of either can be made, write that it’s offline.

####ENTER COMPUTERNAME SCRIPT#####

Start-Process powershell -Verb runAs background

$EnterComputerName = Read-Host ‘Enter ComputerName or IP Address’

$IPaddress = (Resolve-DnsName $EnterComputerName A )[0].IPAddress
$PCName = (Resolve-DnsName $EnterComputerName )[0].namehost

If ((Test-Connection -ComputerName $EnterComputerName -quiet -Count 1))

{
Write-Host -foregroundcolor Green “It’s online! Computer Name: $PCName”

}

or

If ((Test-Connection -ComputerName $EnterComputerName -quiet -Count 1))

{
Write-Host -foregroundcolor Green “It’s online! IP Address: $IPAddress”

}

Else
{
write-host -foregroundcolor -quiet Red "$EnterComputerName is offline :frowning: "
}

So, the right way to do this is with a parameter block.

[CmdletBinding(DefaultParameterSetName='ComputerName')]
Param(
  [Parameter(ParameterSetName='IPAddress')][string]$IPAddress,
  [Parameter(ParameterSetName='ComputerName')][string]$ComputerName
)
if ($PSBoundParameters.ContainsKey('IPAddress')) {
  # specified IP address
} else {
  # specified Computer Name
}

PowerShell will only allow one or the other this way, and you can respond differently based on what was specified.

./myscript.txt SERVER # Assumes computer name since it’s default
./myscript.txt -ComputerName SERVER # computer name also
./myscript.txt -IPAddress 192.168.3.2 # IP Address

I won’t get into how awful it is to be using Write-Host as your output. I’m going to give you the benefit of the doubt and assume that the colored output is 100% mission-critical and that you hate puppies.