如何检查C#列表是否为空？
使用“任意”方法查找列表是否为空。
设置列表-
var subjects = new List<string>();
subjects.Add("Maths");
subjects.Add("Java");
subjects.Add("English");
subjects.Add("Science");
subjects.Add("Physics");
subjects.Add("Chemistry");现在设置以下条件以检查列表是否为空-
bool isEmpty = !subjects.Any();
if(isEmpty) {
Console.WriteLine("Empty");
}else {
Console.WriteLine("List is not empty");
}以下是完整的代码-
示例
using System;
using System.Collections.Generic;
using System.Linq;
public class Demo {
public static void Main(string[] args) {
var subjects = new List<string>();
subjects.Add("Maths");
subjects.Add("Java");
subjects.Add("English");
subjects.Add("Science");
subjects.Add("Physics");
subjects.Add("Chemistry");
foreach (var sub in subjects) {
Console.WriteLine(sub);
}
bool isEmpty = !subjects.Any();
if(isEmpty) {
Console.WriteLine("Empty");
} else {
Console.WriteLine("List is not empty");
}
}
}