I pretty new to LINQ, and I’m keen to get more experience using it, so whenever an opportunity arises I like to try writing LINQ queries. I needed to write a method to extract a comma separated list of numbers from a config file, and return this as List.
I was looking at ways to do this using LINQ, but hit a problem. I wanted my LINQ query to filter out any values in the CSV string that could not be parsed as an int, without causing an exception. Using int.TryParse() seemed like a possible solution, but I had problems because the TryParse() method has an out parameter to store the parsed result. I ended up with the code below, which seems to work, but looks very messy, because I think it is parsing the string twice.
public static List<int> AuthorisedGroups { get { string[] authorisedGroupsStr = ConfigurationManager.AppSettings["AuthorisedGroups"].Split(new char[] { ',' }); int authorisedGroupInt; var authorisedGroupsInt = from authorisedGroupStr in authorisedGroupsStr where int.TryParse(authorisedGroupStr, out authorisedGroupInt) select int.Parse(authorisedGroupStr); return authorisedGroupsInt.ToList(); } }
I found in a blog.
Anybody have any suggestions of how to improve this code?
