月度归档： 2020 年 8 月

var yearList = _context.Content.Where(a => (a.CategoryId == cid )).ToList();
            var query = from t in list
                        group t by new
                        {
                            year = new { t.UpdateTime.Year }
                        }
                        into g
                        select new {
                            year = g.Key.year
            };