C#高级：利用 CancellationToken 实现方法超时控制，提升应用响应性

完整版： 

using System;
using System.Threading;
using System.Threading.Tasks;public class Program
{public static async Task Main(){var cts = new CancellationTokenSource();// 设置超时时间为10秒cts.CancelAfter(TimeSpan.FromSeconds(3));try{var result = await Task.Run(() => LongRunningOperation(cts.Token), cts.Token);if (result == null){Console.WriteLine("操作超时，已跳过相关代码。");}else{Console.WriteLine(result);}}catch (Exception ex){// 捕获其他异常，进行处理Console.WriteLine($"发生异常: {ex.Message}");}}private static string LongRunningOperation(CancellationToken cancellationToken){for (int i = 0; i < 20; i++){// 模拟每秒的工作Thread.Sleep(1000); // 每次睡眠1秒// 定期检查是否请求取消if (cancellationToken.IsCancellationRequested){// 返回 null 表示操作被取消return null;}}return "操作完成";}
}

min版： 

public class Program
{public static async Task Main(){var cts = new CancellationTokenSource();// 设置超时时间为3秒cts.CancelAfter(TimeSpan.FromSeconds(3));await Task.Run(() =>{for (int i = 0; i < 20; i++){// 模拟每秒的工作Thread.Sleep(1000); // 每次睡眠1秒// 检查取消请求if (cts.Token.IsCancellationRequested){// 处理取消逻辑Console.WriteLine("操作被取消。");return; // 直接返回}}Console.WriteLine("操作完成");}, cts.Token);}
}