C#实现方法超时停止的几种方式

using System.Threading;
using System.Threading.Tasks;

public async Task ExecuteWithTimeoutAsync()
{
    var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5)); // 5秒超时
    
    try
    {
        await LongRunningMethodAsync(cts.Token);
    }
    catch (OperationCanceledException)
    {
        Console.WriteLine("操作已超时取消");
    }
}

private async Task LongRunningMethodAsync(CancellationToken token)
{
    for (int i = 0; i < 10; i++)
    {
        token.ThrowIfCancellationRequested();
        await Task.Delay(1000, token); // 模拟耗时操作
        Console.WriteLine($"执行第{i+1}步");
    }
}

var task = Task.Run(() => LongRunningMethod());
if (!task.Wait(TimeSpan.FromSeconds(5)))
{
    Console.WriteLine("方法执行超时");
}

// 或者使用WhenAny
var timeoutTask = Task.Delay(TimeSpan.FromSeconds(5));
var completedTask = await Task.WhenAny(task, timeoutTask);
if (completedTask == timeoutTask)
{
    Console.WriteLine("方法执行超时");
}

using Polly;

var policy = Policy.TimeoutAsync(TimeSpan.FromSeconds(5), 
    TimeoutStrategy.Pessimistic);

try
{
    await policy.ExecuteAsync(async token => 
    {
        await LongRunningMethodAsync(token);
    }, CancellationToken.None);
}
catch (TimeoutRejectedException)
{
    Console.WriteLine("操作已超时");
}