我有以下列表：
class Person
{
public String Name { get; set; }
public String LastName { get; set; }
public String City { get; set; }
public Person(String name,String lastName,String city)
{
Name = name;
LastName = lastName;
City = city;
}
}
...
personList.Add(new Person("a","b","1"));
personList.Add(new Person("c","d","1"));
personList.Add(new Person("e","f","2"));
personList.Add(new Person("g","h","1"));
personList.Add(new Person("i","j","2"));
personList.Add(new Person("k","l","1"));
如何检索与城市名称不同的人员列表？
期待结果：
不同于城市名称的数组/列表(人员)集合：
result[0] = List<Person> where city name = "1" result[1] = List<Person> where city name = "2" result[n] = List<Person> where city name = "whatever"
解决方法
您可以使用LINQ按城市对人员列表进行分组：
var groupedPersons = personList.GroupBy(x => x.City);
foreach (var g in groupedPersons)
{
string city = g.Key;
Console.WriteLine(city);
foreach (var person in g)
{
Console.WriteLine("{0} {1}",person.Name,person.LastName);
}
}
