How to verify version format in powershell script?

Question

So I am trying to verify if a provided version number is valid or not in powershell with the following code:

$ParsedVersion=''

if ([System.Version]::TryParse("1.2.3.43", [ref]$ParsedVersion)) {
    Write-Host ("valid version")
}
else {
    Write-Host ("invalid version")
}

but I keep getting the error Exception calling "TryParse" with "2" argument(s): "Cannot convert value "" to type "System.Version". Error: "Version string portion was too short or too long.""

I tried lots of different ways but still no luck. I am wondering if there exists a right way to do this? Appreciate your help!

The Unculled Badger · Accepted Answer · 2019-03-20 10:02:11Z

1

If you do this instead

$ParsedVersion = $null

it should work..

answered Mar 20, 2019 at 10:02

The Unculled Badger

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Comments

alain · Accepted Answer · 2022-05-21 18:27:52Z

1

This worked for me!

$version = "1.2.3.43"
$IsValid = & {
      try {
        [bool][version]$Version
      } catch [System.Management.Automation.PSInvalidCastException], [System.ArgumentException] {
        # The version is invalid, too long or too short.
        $false
      } catch {
        # definetly not because the version is invalid
        throw $_.Exception
      }
}
if ($IsValid) {
    Write-Host ("valid version")
} else {
    Write-Host ("invalid version")
}

answered May 21, 2022 at 18:27

alain

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Comments

Kagemand Andersen · Accepted Answer · 2024-05-13 06:10:59Z

0

I know this is an old question, but the problem in the original code is that ParsedVersion version is initialized as String and not Version.

$ParsedVersion=[System.Version]::new()

if ([System.Version]::TryParse("1.2.3.43", [ref]$ParsedVersion)) {
    Write-Host ("valid version")
}
else {
    Write-Host ("invalid version")
}

This works as intended.

answered May 13, 2024 at 6:10

Kagemand Andersen

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