c# - 从两个集合创建父 -> 子层次结构

Question

我有两个充满数据的独立集合实例

List<Parent> parents;
List<Child> children;

可以通过 Child.ParentId 和 Parent.Children 连接两个集合。

parents 集合没有填充 Children 属性，那么如何将 Parent 对象与 Children 对象链接起来？

Answer 1

试试这个:

var result = from d in parents  
             join s in children  
             on d.ParentID equals s.ParentID into g  
             select new  
             {  
                 ParentName = d.ParentName,  
                 ChildList = g  
             };

foreach (var item in result)  
{  
    Console.WriteLine("Parent: {0}", item.ParentName);  
    foreach (var Child in item.ChildList)  
    {  
        Console.WriteLine(Child.Name);  
    }  
    Console.WriteLine();  
}