LINQ集团通过两条语句

Question

喜有反正我通过i.Number，我写的财产以后这样

  var r = from i in myList 
       group i by i.Number 
        into grp 
        select new 
        { 
         Reported = grp.Select(x => x.CurrentStatus).First(), 
         Number = grp.Key, 
         Sum = grp.Sum(x => x.Details[0].Quantity), 
         Name = grp.Select(x => x.Name).First(), 
         Details = grp.Select(x => x.Details).First(), 
         Descriptions = grp.Select(x => x.Descriptions).First(), 
         AssignmentId = grp.Select(x => x.AssignmentId).First(), 
         Listor = grp.Select(x => x.Number).Count() 
        }; 

这个

  var r = from i in myList 
       group i by i.Number, i.CurrentStatus 
        into grp 
        select new 
        { 
         Reported = grp.Select(x => x.CurrentStatus).First(), 
         Number = grp.Key, 
         Sum = grp.Sum(x => x.Details[0].Quantity), 
         Name = grp.Select(x => x.Name).First(), 
         Details = grp.Select(x => x.Details).First(), 
         Descriptions = grp.Select(x => x.Descriptions).First(), 
         AssignmentId = grp.Select(x => x.AssignmentId).First(), 
         Listor = grp.Select(x => x.Number).Count() 
        }; 

，这样我可以按“组。 CurrentStatus”

Answer 1

集团由一个匿名类型：

 var r = from i in myList 
      group i by new { i.Number, i.CurrentStatus } 
       into grp 
       select new 
       { 
        Reported = grp.Key.CurrentStatus, 
        Number = grp.Key.Number, 
        Sum = grp.Sum(x => x.Details[0].Quantity), 
        Name = grp.Select(x => x.Name).First(), 
        Details = grp.Select(x => x.Details).First(), 
        Descriptions = grp.Select(x => x.Descriptions).First(), 
        AssignmentId = grp.Select(x => x.AssignmentId).First(), 
        Listor = grp.Select(x => x.Number).Count() 
       };