Regular Expression for word occurence in a text

Question

I'm using the following regular expression to count the occurrence of a word inside a text

string term="framework";
int count = Regex.Matches(r.ResourceDescription.ToLower(), "\b" + term + "\b/gm").Count;

but on the following text (contained in r.ResourceDescription) it returns alway 0:

"Markets play a paramount role in enhancing people's livelihoods and promoting food security. BE tailored a food security framework having markets as one of the elements that should be tackled within the overall food security analysis."

Get rid of the `/gm`. And you can use `RegexOptions.IgnoreCase` instead of `ToLower` — juharr, Oct 02 '19 at 13:15
@juharr yes already tested...but nothing change. The count is always 0 — Giox, Oct 02 '19 at 13:18
As other's have noticed you also have to escape the backslashes either `"\\b"` or `@"\b"`. the second one is called a verbatim string. — juharr, Oct 02 '19 at 13:20
You need to escape by "\\" IMO, i.e.`"\\b" + term + "\\b/gm"` — Code Maniac, Oct 02 '19 at 13:20

score 4 · Accepted Answer · answered Oct 02 '19 at 13:18

When you were creating a pattern, you forgot to escape string. So, try like this:

string desc = "Markets play a paramount role in enhancing people's livelihoods and promoting food security. BE tailored a food security framework having markets as one of the elements that should be tackled within the overall food security analysis";
string term = "framework";
string regex = @"\b" + term + @"\b";
int count = Regex.Matches(desc, regex, RegexOptions.Multiline | RegexOptions.IgnoreCase).Count;

Regular Expression for word occurence in a text

1 Answers1