如何对两种不同类型的列表进行分组和排序？

Question

我有两种不同类型的列表的对象，我只想对该特定对象执行OrderBy和GroupBy。

我不想为这两个列表单独做它。

现在我这样做：

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CollectionViewSource对象。

但我想在组合的对象上做到这一点。

Answer 1

创建这样一个接口：

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

继承你的类里面的属性recipientFilteredDataByPersonsrecipientFilteredDataByPlaces从这个接口

现在你能做到这一点：

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]);