我有一个对象:
public class Customer
{
public int ID { get; set; }
public string Name { get; set; }
public int GroupID { get; set; }
}
我返回一个可能如下所示的列表:
List<Customer> CustomerList = new List<Customer>();
CustomerList.Add( new Customer { ID = 1, Name = "One", GroupID = 1 } );
CustomerList.Add( new Customer { ID = 2, Name = "Two", GroupID = 1 } );
CustomerList.Add( new Customer { ID = 3, Name = "Three", GroupID = 2 } );
CustomerList.Add( new Customer { ID = 4, Name = "Four", GroupID = 1 } );
CustomerList.Add( new Customer { ID = 5, Name = "Five", GroupID = 3 } );
CustomerList.Add( new Customer { ID = 6, Name = "Six", GroupID = 3 } );
我想返回一个 linq 查询,它看起来像
CustomerList
GroupID =1
UserID = 1, UserName = "UserOne", GroupID = 1
UserID = 2, UserName = "UserTwo", GroupID = 1
UserID = 4, UserName = "UserFour", GroupID = 1
GroupID =2
UserID = 3, UserName = "UserThree", GroupID = 2
GroupID =3
UserID = 5, UserName = "UserFive", GroupID = 3
UserID = 6, UserName = "UserSix",
我尝试从
使用 Linq 将对象列表分组为新的对象列表分组列表 https://stackoverflow.com/questions/2697253/using-linq-to-group-a-list-of-objects-into-a-new-grouped-list-of-list-of-objects
code
var groupedCustomerList = CustomerList
.GroupBy(u => u.GroupID)
.Select(grp => grp.ToList())
.ToList();
有效,但没有给出所需的输出。