如何对两种不同类型列表的对象进行分组和排序？

Question

我有一个包含两种不同类型列表的对象，我只想对该特定对象执行 OrderBy 和 GroupBy。

我不想为两个列表分别做。

现在我正在这样做：

List<object> combinePlacePerson = (from x in recipientFilteredDataByPersons.OrderBy(x => x.FirstName).GroupBy(x => x.FirstName[0]) select (object)x).ToList();
combinePlacePerson.AddRange((from x in recipientFilteredDataByPlaces.OrderBy(x => x.FirstName).GroupBy(x => x.FirstName[0]) select (object)x).ToList());
cvrbyperson.Source = combinePlacePerson;

cvrbyperson 是一个 CollectionViewSource 对象。

但我想在组合对象上进行。

Answer 1

像这样创建一个界面：

public interface IHaveFirstName
{
   string FirstName { get; set; }
}

从这个接口

继承你的类里面的属性recipientFilteredDataByPersonsrecipientFilteredDataByPlaces

现在您可以这样做了：

List<IHaveFirstName> combinePlacePerson = (from x in recipientFilteredDataByPersons 
                        select (IHaveFirstName)x).ToList(); //you need inheritance here
combinePlacePerson.AddRange((from x in recipientFilteredDataByPlaces 
                        select (IHaveFirstName)x).ToList()); //and here
//here you order full collection
combinePlacePerson = combinePlacePerson.OrderBy(x => x.FirstName)
                                       .GroupBy(x => x.FirstName[0]);

如何对两种不同类型列表的对象进行分组和排序？

How to to grouping and ordering on an object of two different types of list?

c#

linq

grouping

list

sql-order-by