LINQ黨團由

Question

天

我有以下分組聲明：

var test = from a in MyDC.Table 
    where ..... 
    group a by a.Date into daygroups 
    select new MyModel() 
    { 
    TheCount = (from c in daygroups 
       where c.AppointDate < "the date of the daygroups for this day").Sum(d =>d) 
      } 

基本上，查詢看起來在表中某一月內任命由天不計數月的每一天。 Daygroups將結果按天分組，以便我可以做日常計數。如何指定日期組內的日期？

謝謝。

Answer 1

嘗試

where c.AppointDate < daygroups.Key 

Answer 2

你的日期是在daygroups.Key

當與LINQ分組，你在分組中的值IGrouping對象，daygroups的你的情況主要財產結束。

事情是這樣的，也許：

var test = from a in MyDC.Table 
where ..... 
group a by a.Date into daygroups 
select new MyModel { 
    TheCount = daygroups.Where(d => d.AppointDate < daygroups.Key).Count() 
}