Question

I have a table with the following fields:

1. Action => Click/Open
2. DateTime => Date and time action
   occured

example:

Action | DateTime

---

1. click | 3/12/2010 3:00AM
2. click | 3/12/2010 3:12AM
3. open | 3/12/2010 3:34AM
4. click | 3/12/2010 4:12AM
5. click | 3/13/2010 1:12PM

etc..

I need to group these by hour so that I have a number of clicks and opens hourly.

how would i do it?
thanks

Answer 1

I solved it like so:

        List<MySummary> summary =
            entries.Select(i => new { i, dt = i.Date }).GroupBy(
                @t => new { date = @t.dt.Date, time = @t.dt.Hour }, @t => @t.i).Select(
                    g =>
                    new MySummary()
                        {
                            Date = g.Key.date.AddHours(g.Key.time),
                            Opens = g.Count(x => x.Type == "Open"),
                            Clicks = g.Count(x => x.Type == "Click")
                        }).ToList();

Please let me know if you guys think this is incorrect..but from the looks of it..it gets the right data.

Model:

    public class MySummary
{
    public DateTime Date { get; set; }

    public int Opens { get; set; }

    public int Clicks { get; set; }
}