Question

I need to find the next three available business days for a scheduling application. What is available depends upon excluded dates in a table. So…as long as the date is not in my table and not a Saturday or Sunday, I want the next three. I’d like to find an efficient way of doing this.

I need to return a List<DateTime>. The table is simple – ExcludedDates has an ID and a DateTime with the excluded date.

I’d like to have a single LINQ query expression but can’t figure it out…thanks to all in advance and I apologize if this is trivial or obvious – it isn’t to me.

Answer 1

Try this…

  DateTime start = DateTime.Now.Date;
  var result = Enumerable.Range(1, 10) // make this '10' higher if necessary (I assume you only exclude non-workingdays like Christmas and Easter)
                    .Select(offset => start.AddDays(offset))
                    .Where(date => !( date.DayOfWeek == DayOfWeek.Saturday || date.DayOfWeek== DayOfWeek.Sunday))
                    .Where(d=> !exceptionTable.Any(date => date == d))
                    .Take(3).ToList();