Question

好的，我有一个列表，我想将具有相同名字的对象合并为一个，并将兄弟姐妹添加到其他兄弟姐妹列表中。

public class People
{ 
    string Name {get; set;}
    List<string> siblings {get; set;}
}

现在我有一个类似于

的列表

 List<People> list3 = new List<People> 
 {  
     new People
     {
        name = "Chris",
        siblings = {"Richard"}
     },
     new People
     {
        name = "Billy",
        siblings = {"Thomas"}
     },
     new People
     {
        name = "Bob",
        siblings = {"Charles"}
     },
     new People
     {
        name = "Chris",
        siblings = {"Simon"}
     }
 }

现在我希望它变成：

 List<People> list3 = new List<People> 
 {  
     new People
     {
        name = "Chris",
        siblings = {"Richard", "Simon"}
     },
     new People
     {
        name = "Billy",
        siblings = {"Thomas"}
     },
     new People
     {
        name = "Bob",
        siblings = {"Charles"}
     }
 }

Answer 1

您目前的连接列表方式不起作用，否则您需要：

var query = list3.GroupBy(r => r.Name)
                .Select(grp => new People
                {
                    Name = grp.Key,
                    Siblings = grp.SelectMany(r => r.Siblings).ToList(),
                });

要获得组合列表，您可以这样做：

List<People> list3 = list1.Concat(list2).ToList();

Answer 2

我认为这样的事情应该有用。

var list3 = list2.Concat(list1).GroupBy(p => p.name)
    .Select(g => new People{
        name= g.Key, 
        siblings = from p in g
                   from s in p.siblings
                   select s
    });

使用Linq比较两个列表

2 个答案: