How to get the value after the first = in powershell? - powershell

Question

In a file i have
datasource =(Description=(failover=on)(load_balance=off) transport_connect_timeout=1)
I want to pass the value using $datasource.
While I use
$datasource =Get-content "c:\file | select-string -pattern datasource"
this give me whole line
datasource =(Description=(failover=on)(load_balance=off)transport_connect_timeout=1)
but I need only
(Description=(failover=on)(load_balance=off) transport_connect_timeout=1)
please help me. Thanks in advance.

Answer 1

Here's one approach:
$fullValue = "datasource =(Description=(failover=on)(load_balance=off) transport_connect_timeout=1)"
($fullValue -split "=" | Select-Object -Skip 1) -join "="
Split the string on the equals signs
Grab all but the first split string
Join them all back together again using the equals sign

Answer 2

Select-String uses regular expressions with the -Pattern.
I'd use a more advanced one with a positive look behind and a capture group.
$datasource = sls .\file.txt -Patt '(?<=datasource =)(.*)$'|% {$_.Matches.groups[1].value}
RegEx explanation from regex101.com
(?<=datasource =)(.*)$
Positive Lookbehind (?<=datasource =)
Assert that the Regex below matches
datasource = matches the characters datasource = literally (case sensitive)
1st Capturing Group (.*)
.*
. matches any character (except for line terminators)
* Quantifier — Matches between zero and unlimited times,
as many times as possible, giving back as needed (greedy)
$ asserts position at the end of a line
The pipe to % {$_.Matches.groups[1].value} iterates all matches and returns only the content of the capture group [1]