Question

是否可以通过以下内容编写linq选择内部顺序：

 ReservationDTO obj = new ReservationDTO();
 obj.bookroomview = obj.bookroomview.GroupBy(a => a.RoomFloor)
                .Select(a => obj.bookroomview
                    .Select(x => new { Amount = a.Select(b => b.ReservationRoomID).Count(), Name = a.Key })
                    .OrderBy(x => x.Amount)

                ).ToList().AsQueryable();

我的目标是选择所有obj.roombookview项目，但根据计算计算对它们进行排序。如果有可能我怎么写呢？

我的观点类：

public partial class Book_Room_View
{
    public Nullable<int> ReservationID { get; set; }
    public Nullable<System.DateTime> StartDate { get; set; }
    public Nullable<System.DateTime> EndDate { get; set; }
    public Nullable<int> ReservationRoomID { get; set; }        
    public string RoomName { get; set; }

}

Answer 1

如果你要通过预订订购这些团体，我想这是正确的做法，你不需要计算特定属性，因为我猜你正在尝试，只需按值列表的顺序排序。

obj.bookroomview.GroupBy(a => a.RoomFloor)
                .OrderBy(gr => gr.Count())
                .Select(gr => new { Amount = gr.Count(), Name = gr.Key })
                .AsQueryable();

Linq在Order By中选择语句

1 个答案: