Question

I have a table called Events and these are example of EndDate columns:

I am trying to extract months from these events, but I want them to be like: 11, 12, 1 (11 and 12 from current year, and 1 is from next year – 2013).

var ev = db.Events.Select(d => new { Month = d.StartDate.Value.Month, 
                                     EndDate = d.EndDate })
                  .Where(d => (d.EndDate >= DateTime.Now
                           || (   d.EndDate.Value.Day == DateTime.Now.Day 
                               && d.EndDate.Value.Month >= DateTime.Now.Month) ))
                  .OrderBy(d => d.EndDate.Value.Year)
                  .Select(d => new { Month = d.Month }).Distinct();

Well, I don’t understand why this query does not work. It extracts months as: 1, 11, 12 which of course, is not what I want…

Ps: You can ignore where clause, that is only filtering the events from now on.

Answer 1

You are sorting on Year only .OrderBy(d => d.EndDate.Value.Year) but you probably want to sort by d.EndDate.Value

Year only will be ignoring any days/months part of the date…so the “first” 2012 in the list is the first item.

    var events = new List<DateTime>
    {
        new DateTime(2013,11,1),
        new DateTime(2013,5,1),
        new DateTime(2013,4,1),
        new DateTime(2012,12,29),
        new DateTime(2012,12,28)
    };

    var ev = events.Select(d => new { Month = d.Month, Date = d })
        .Where(d => (d.Date >= DateTime.Now || (d.Date.Day == DateTime.Now.Day && d.Date.Month >= DateTime.Now.Month)))
        .OrderBy(d => d.Date.Year)
        .Select(d => new { Month = d.Month })
        .Distinct();

will return 12,11,5,4

var ev = events.Select(d => new { Month = d.Month, Date = d })
                .Where(d => (d.Date >= DateTime.Now || (d.Date.Day == DateTime.Now.Day && d.Date.Month >= DateTime.Now.Month)))
                .OrderBy(d => d.Date)
                .Select(d => new { Month = d.Month })
                .Distinct();

will return 12,4,5,11