LINQ組由數

Question

我想要得到的計數，即使計數爲0或不LINQ GROUP BY。這是我的linq組合。在foreach循環中，如果var g中沒有計數，則循環。我想得到這個變數，即使計數爲0

var x = from b in context.Bookings 
        where b.FlightID == f.FlightID 
        group b by b.FlightID into g       
        select new 
        {        
         Count = g.Count() 
        };     


       foreach (var g in x) 
      { 
       var c = (from a in context.Aeroplanes 
         where a.AeroplaneID == f.AeroplaneID 
         select a.Capacity).First(); 

       int capacity = c; 

       int i = g.Count; 

       if (capacity - i >= NoOfPass) 
       { 
        returnList.Add(f); 
       } 
      } 

Answer 1

在這種情況下，我認爲不需要group by。它可以通過選擇並計算結果的行來完成。

var x = from b in context.Bookings 
     where b.FlightID == f.FlightID 
select b; 
int count= x.count();