Group posts by year, then by month

Question

I need some help with LINQ-2-SQL in order to group some blog posts by a year and month.

Basically, I have a collection of blog posts that have the following properti

Answer 1

Here's an alternative if you don't want to do the projections and leave them as groupings.

var groupedBlogPosts =
    from post in blogPostsFiltered
    group post by new { post.Date.Year, post.Date.Month } into grouped
    group grouped by new { grouped.Key.Year };

Answer 2

I haven't actually tested this, but it looks like a start, wrote this by looking at this msdn article:

var groupedBlogPosts =
                from p in blogPostsFiltered
                group p by p.Date.Year into yg
                select
                    new
                    {
                        Year = yg.Key,
                        MonthGroups =
                            from o in yg
                            group o by o.Date.Month into mg
                            select new { Month = mg.Key, Posts = mg }
                    };

Look under the GroupBy - Nested heading.