regex.matches notmatching

Question

im trying to do this for 5 hours im desperate im gonna get mad. please helpme.

var start   =  new  List<string>( ) {"Report", "Audit"  , "Committee" } ;
string expresss= start[0] + @"(.*?)\n{0,1}(.*?)" + start[1] + @"(.*)$";
MatchCollection matches = Regex.Matches(text, "(?im)"+ expresss );

this code fails to find ""REPORT OF THE AUDIT COMMITEE""

but here wit sublime text3's regex ican find it .

please help me to find ""REPORT OF THE AUDIT COMMITEE"" via c# regex code. thanks.

It can be because of linbreak: use `\r?\n`. Try `string expresss= start[0] + @"(.*?)\r?\n{0,1}(.*?)" + start[1] + @"(.*)$";` — Wiktor Stribiżew, Sep 21 '15 at 15:33
thats what i did . it gives same resul before . start[0] + @"(.*?)\r?\n{0,1}(.*?)" + start[1] + @"(.*)$" — bh_earth0, Sep 21 '15 at 15:42
possible duplicate of [Regex options matching multi-line as well as ignoring the case](http://stackoverflow.com/questions/14611495/regex-options-matching-multi-line-as-well-as-ignoring-the-case) — TheLethalCoder, Sep 21 '15 at 15:51

Flynn1179 · Accepted Answer · 2015-09-21T15:45:38.943

1

Looks like it's both the fact that it's case sensitive, and you're not matching a regex across multiple lines (thanks to @stribizhev for spotting that).

Use:

MatchCollection matches = Regex.Matches(text, "(?im)"+ expresss,
  RegexOptions.Multiline | RegexOptions.IgnoreCase );

I can't tell from the context, but it might also be worth considering whether using RegexOptions.CultureInvariant is also appropriate.

EDIT: Ok, I had no idea C# could use (?im) for case + multi-line matching. In that case, not sure how this worked for you, if (?im) didn't. I just took the options off my test, leaving the (?im) on and it did match.

edited Sep 21 '15 at 15:45

answered Sep 21 '15 at 15:40

Flynn1179

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`(?im)` = `RegexOptions.Multiline | RegexOptions.IgnoreCase` – Wiktor Stribiżew Sep 21 '15 at 15:42
1

`(?im)` doesn't work in .NET, Flynn is correct that he needs to specify these as parameters to the Matches. – Robert McKee Sep 21 '15 at 15:46
actually i new it was related to multiline . but iwasnt able to figure out. – bh_earth0 Sep 21 '15 at 15:46
@RobertMcKee I just tested it, and it did. Possibly different version of .NET? I was targetting .NET 3.5 – Flynn1179 Sep 21 '15 at 15:47
@Flynn1179 I was wrong. It happens sometimes... https://msdn.microsoft.com/en-us/library/yd1hzczs(v=vs.71).aspx – Robert McKee Sep 21 '15 at 16:03
Yeah, I have to admit, I'm not comfortable with this answer being accepted, it doesn't seem like this should have solved the problem. Certainly the `(?im)` on the front as well as the regex options should be redundant. – Flynn1179 Sep 22 '15 at 07:48

regex.matches notmatching

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