Question

When i execuse these lines

drpdf["meno"] = matches.Cast<Match>().Where(c => c.Groups["ID"].Value == i.ToString()).Select(c => c.Groups["meno"].Value);
drpdf["info"] = matches.Cast<Match>().Where(c => c.Groups["ID"].Value == i.ToString()).Select(c => Regex.Replace(c.Groups["zvysok"].Value, @"^,\s?", string.Empty));

it wont save into DataRow value that i want, instead of

System.Linq.Enumerable+WhereSelectEnumerableIterator`2[System.Text.RegularExpressions.Match,System.String]

Can you help me pls how to select/cast return value to the readable type? Thanks anyway. Ondro

Answer 1

Your LINQ queries use Select, so you get an IEnumerable<T> back. If you want the result of your LINQ query, and are expecting exactly one result, add .Single():

drpdf["meno"] = matches.Cast<Match>()
                       .Where(c => c.Groups["ID"].Value == i.ToString())
                       .Select(c => c.Groups["meno"].Value)
                       .Single();

On the other hand, if your query can have multiple results, you should use .First() instead to take the first result. At that point, however, it depends what your scenario is and what you’re trying to capture.