Regex Not Match To Next Line

Question

Want to match what is after "subject" or "subject:" but only on that line
I want to search all lines for subject or subject:
But if the rest of the line is blank not match

(?i)(?<=\bSubject:?\s+).+$

Sample text

Subject:  
Pat Sanders

(line break between Subject: and Pat)

That regex is matching Pat Sanders.
Since it is on the next line I do NOT want it to match.

The regex is compiled with RegexOptions.Multiline

I think the .+ is greedy and consuming the line break.

This works in that it only matches on the current line:

(?i)(?<=\bsubject:).+?$

But this does not work:

(?i)(?<=\bsubject:?).+?$

The lookback does not consume the :
The : is included in the match

Answer 1

尝试这可能会工作

(\b(subject)\b).+(?=\s+\r?$)

Answer 2

Did you try this?

Subject:[\w ]+$

See it here: http://rubular.com/r/k8SyIO6c2R