Question

I ran into a problem with my regular expressions, I’m using regular expressions for obtaining data from the string below:

 "# DO NOT EDIT THIS MAIL BY HAND #\r\n\r\n[Feedback]:hallo\r\n\r\n# DO NOT EDIT THIS MAIL BY HAND #\r\n\r\n"

So far I got it working with:

String sFeedback = Regex.Match(Message, @"\[Feedback\]\:(?<string>.*?)\r\n\r\t\n# DO NOT EDIT THIS MAIL BY HAND #").Groups[1].Value;

This works except if the header is changed, therefore I want the regex to read from [feedback]: to the end of the string. (symbols, ascii, everything..)

I tried: \[Feedback]:(?<string>.*?)$

Above regular expression does work in some regular expression builders online but in my c# code its not working and returns a empty string. What’s wrong?

Answer 1

The problem is that . doesn’t match newlines unless you use RegexOptions.Singleline when compiling the regex or inline it using (?s):

(?s)\[Feedback\]:(.*)$