C#中如何获取List中所有符合谓词指定条件的元素?
csharpserver side programmingprogramming更新于 2025/5/14 9:52:17
获取List中所有符合谓词指定条件的元素，代码如下 −
示例
using System;
using System.Collections.Generic;
public class Demo {
private static bool demo(int i) {
return ((i % 3) == 0);
}
public static void Main(String[] args) {
List<int> list = new List<int>();
list.Add(9);
list.Add(15);
list.Add(20);
list.Add(40);
list.Add(50);
list.Add(60);
Console.WriteLine("List elements...");
foreach (int i in list) {
Console.WriteLine(i);
}
Console.WriteLine(" ");
List<int> res = new List<int>(list.FindAll(demo));
Console.WriteLine("List that match the conditions...");
foreach (int i in res) {
Console.WriteLine(i);
}
}
}
输出
这将产生以下输出 −
List elements... 9 15 20 40 50 60 List that match the conditions... 9 15 60
示例
让我们看另一个例子 −
using System;
using System.Collections.Generic;
public class Demo {
private static bool demo(int i) {
return ((i % 100) == 5);
}
public static void Main(String[] args) {
List<int> list = new List<int>();
list.Add(900);
list.Add(1500);
list.Add(250);
list.Add(405);
Console.WriteLine("List elements...");
foreach (int i in list) {
Console.WriteLine(i);
}
Console.WriteLine(" ");
List<int> res = new List<int>(list.FindAll(demo));
Console.WriteLine("List that match the conditions...");
foreach (int i in res) {
Console.WriteLine(i);
}
}
}
输出
这将产生以下输出 −
List elements... 900 1500 250 405 List that match the conditions... 405
