var query = from c in items
group c by c.日期
select c.items.orderbydescending(x=>x.弯曲度).first()
上面是伪代码,你参考下,我不方便写linq。
OK 得稍微改动一下
var n= from c in lmList
group c by c.Dates.ToString("yyyy-MM-dd") into p
select p.OrderByDescending(i=>i.Curvature).First();