使用linq按數組元素分組

Question

我有以下結構中的數據，需要按Id和Date進行分組。日期是一個數組上的字段。我需要總結每個日期在頂級Id分組的數量，這可能與linq？

Id 
Number 
MyArray[] 

MYARRAY如下：

[Amount, Date] 

試圖用這樣的事情，但它不會工作，因爲我的第二分組是主項

輸入陣列上：

Id Number MyArray 
1 5  [{500.00,2001-03-08}, {200,2001-04-04}, {600, 2001-03-09}] 
2 6  [{700.00,2001-03-08}, {300,2001-03-08}] 
1 7  [{400.00,2001-03-08}, {100, 2001-04-04}, {550.00,2001-12-12}] 

預期結果：

Id MyArray 
    1 [{500.00+400.00,2001-03-08}, {200+100,2001-04-04}, {600, 2001-03-09}, {550.00,2001-12-12}] 
    2 [{700.00,2001-03-08}, {300,2001-03-08}] 

from s in db.Schedules 

group s by new {s.empid, s.weekending} into g 

select new { g.Key.empid, g.Key.weekending, g.Sum(s => s.hours) }; 

Answer 1

var results = db.Schedules.GroupBy(x => x.Id) 
          .Select(g => new 
             { 
              .Id = g.Key, 
              .Data = g.SelectMany(x => x.MyArray) 
                .GroupBy(x => x.Date) 
                .Select(g2 => new { Amount = g2.Sum(x => x.Amount), Date = g2.Key }) 
                .ToArray() 
             });