Extract substring with Regex

Question

im trying to extract a substring with regex but im having some troubles...

The string is build from a columns of strings and i need the the 4th column only

string stringToExtractFrom = "289  120 00001110 ?? 
4Control@SimApi@@QAEAAV01@ABV01@@Z = ??4Control@SimApi@@QAEAAV01@ABV01@@Z 
(public: class SimApi::Control & __thiscall SimApi::Control::operator=(class 
SimApi::Control const &))"
string pattern = @"\s+\d+\s+\d+\s+\S+\s(.*)\=";
RegexOptions options = RegexOptions.Multiline;

Regex regX = new Regex(pattern, options);
Match m = regX.Match(stringToExtractFrom);

while (m.Success)
{                       

 Group g = m.Groups[1];
 defData += g+"\n";
 m = m.NextMatch();
}

this is the wanted string: ?? 4Control@SimApi@@QAEAAV01@ABV01@@Z

with the string below it worked when i got the substring i want as a group

1 0 00002E00 ??0ADOFactory@SimApiEx@@QAE@ABV01@@Z = ??0ADOFactory@SimApiEx@@QAE@ABV01@@Z (public: __thiscall SimApiEx::ADOFactory::ADOFactory(class SimApiEx::ADOFactory const &))

Maybe Regex.Match(stringToExtractFrom, @"\B\?\?\S*").Value will do? — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Mar 17, 2019 at 14:08

The fourth bird · Accepted Answer · 2019-03-17 14:47:47Z

1

If the second string works for you and the first one does not, you might first match 1+ digits and use \S+ for the third part. Then use a negated character class to capture matching not an equals sign:

\d+\s+\d+\s+\S+\s+([^=]+) =

See a .NET regex demo | C# Demo

edited Mar 17, 2019 at 14:47

answered Mar 17, 2019 at 14:19

The fourth bird

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2 Comments

The fourth bird Over a year ago

@lior The columns are divided by the whitespace right? What is green in the regex101 link is the first capturing group regex101.com/r/Iaks6D/3

lior Over a year ago

Yes, this is the only way i could get the column i wanted.. Im sure there is a better way to get it as the match and not group

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