Question

我有一个Person个对象的列表。如何使用Person从List<Person> People获取符合特定条件的第一个和第二个LINQ个对象？

我们在这里说的是我得到的清单。我怎样才能得到18岁以上的第一和第二人詹姆斯和朱迪。

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
   new Person {Name = "Jack", Age = 15},
   new Person {Name = "James" , Age = 19},
   new Person {Name = "John" , Age = 14},
   new Person {Name = "Jodie" , Age = 21},
   new Person {Name = "Jessie" , Age = 19}
}

Answer 1

var topTwo = People.Where(a => a.Age > 18).Take(2).ToArray();

Person p1, p2;
if (topTwo.Any())
{
   p1 = topTwo[0];
   if (topTwo.Count > 1)
       p2 = topTwo[1];
}

Answer 2

您可以使用＆＃39; Take（）＆＃39;在这里发挥作用。

在您的情况下，以下代码将获得前两个元素：

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
    new Person {Name = "Jack", Age = 15},
    new Person {Name = "James" , Age = 19},
    new Person {Name = "John" , Age = 14},
    new Person {Name = "Jodie" , Age = 21},
    new Person {Name = "Jessie" , Age = 19}
}

People.Take(2);

以下代码将为您提供年龄为18岁的前2个元素：

public class Person
{
    public string Name;
    public int age;
}

var People = new List<Person>
{
    new Person {Name = "Jack", Age = 15},
    new Person {Name = "James" , Age = 19},
    new Person {Name = "John" , Age = 14},
    new Person {Name = "Jodie" , Age = 21},
    new Person {Name = "Jessie" , Age = 19}
}

People.Where(x => x.Age > 18).Take(2);

Answer 3

var firstTwo = People.Where(a => a.Age > 18).Take(2);

使用LINQ从列表中获取第一个和第二个对象

3 个答案: