RegExp for required keywords?

Question

I've got a system in C# where by a set of keywords are required. Two fields have to be checked if the keywords exist.

Initially I wrote a foreach loop to go through each keyword, then cycle through the results and check. However, this is somewhat inefficient, as on check, I would like to see if any of the keywords exist in a given string, rather than one by one.

Thanks.

Answer 1

Does this question match what you are trying to do?

The answer shows you how to match multiple possible words in one go with a regex

Answer 2

If you are on c# 3.5+ try this

        Regex r1 = new Regex("MyKeywordRegex");
        IEnumerable<MyResultClass> results = GetMyResults();
        var myFilteredResults = results.Any(a => (r1.IsMatch(a.Field)));

Answer 3

((keyword1)|(keyword2)|(keyword3))

Im not sure exactly how c# does regex but this should match and return matches.

You can test regexes here