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:
I return a list that may look like the following:
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
I want to return a linq query which will look like
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",我尝试过
使用 Linq 将对象列表分组为新的对象列表分组列表
代码
var groupedCustomerList = CustomerList .GroupBy(u => u.GroupID) .Select(grp => grp.ToList()) .ToList();工作但没有提供所需的输出.
works but does not give the desired output.
推荐答案 var groupedCustomerList = CustomerList.GroupBy(u => u.GroupID) .Select(grp =>new { GroupID =grp.Key, CustomerList = grp.ToList()}) .ToList();