Extract value from powershell regex matches
<p>As a part of a buildscript in powershell, I am trying to extract a version number from a string using regular expression. The number is assumed to be in a format xx.yy (eg. 10.6) I need the Integer part (in this example, it would be 10) and the fraction part (example: 6)</p>

<p>I want to have a method that checks that both my patterns exists and thereafter extracts the numbers. (I am very much a novice in powershell, and am trying to avoid using C# functions, but rather powershell itself.)</p>

<p>I tried to do this:</p>

<pre><code>$integralPart="A"
$fractionPart="B"

function GetVersion {
    param([string]$strVersion)
    $integralPattern="^[0-9]+(?=\.)" 
    $fractionalPattern="(?&lt;=\.)[0-9]+$"

    #Check if string consists of an integral and fractional part
    If ($strVersion -match $integralPattern -eq $True -and $strVersion -match $fractionalPattern -eq $True)
    {
        $strVersion -match $integralPattern
        $integralPart = $matches[0]

        $strVersion -match $fractionalPattern
        $fractionalPart = $matches[0]
    } 
    else
    {
        Write-Host "You did not enter a double with an integer and a fractional part (eg. 10.6)"
        Exit
    }
}

GetVersion (Read-Host 'Enter program version')
Write-Host $integralPart
Write-Host $fractionPart
</code></pre>

<p>In doing so, I was hoping that $integralPart and $fractionalPart would contain my numbers, at they match the values they should</p>

<p>Can anyone explain how this can be done?</p>