C# 计算执行时间

我需要计算执行某个进程的时间。例如，我想从一个文件中读取所有行，但如果超过5秒，则显示messagebox，例如。我应该如何以及创建什么计时器来处理这5秒？

使用类：System.Diagnostics命名空间的一部分

Stopwatch watch = new Stopwatch();
watch.Start();
while (someCond) {
    if (watch.Elapsed.TotalSeconds >= 5) {
        MessageBox.Show("Process taking too much time, aborting");
        break;
    }
    //keep looping
}
watch.Stop();
string msg = "Process took " + watch.Elapsed.TotalSeconds + " seconds to complete"

使用类：System.Diagnostics命名空间的一部分

Stopwatch watch = new Stopwatch();
watch.Start();
while (someCond) {
    if (watch.Elapsed.TotalSeconds >= 5) {
        MessageBox.Show("Process taking too much time, aborting");
        break;
    }
    //keep looping
}
watch.Stop();
string msg = "Process took " + watch.Elapsed.TotalSeconds + " seconds to complete"

---

考虑以下方法：

var cts = new CancellationTokenSource();
var task = new Task(YourLongRunningOperation, cts.Token);
task.Start();

var delayTask = Task.Delay(5000);

try
{
    await Task.WhenAny(task, delayTask);
    if(!task.IsCompleted)
    {
        cts.Cancel();
        // You can display a message here.
        await task;
    }
}
catch(OperationCanceledException cex)
{
    // TODO Handle cancelation.
}
catch (AggregateException aex)
{
    // TODO Handle exceptions.
}

if(task.IsCanceled && delayTask.IsCompleted)
{
    // TODO Display a long running error message.
}

---

考虑以下方法：

var cts = new CancellationTokenSource();
var task = new Task(YourLongRunningOperation, cts.Token);
task.Start();

var delayTask = Task.Delay(5000);

try
{
    await Task.WhenAny(task, delayTask);
    if(!task.IsCompleted)
    {
        cts.Cancel();
        // You can display a message here.
        await task;
    }
}
catch(OperationCanceledException cex)
{
    // TODO Handle cancelation.
}
catch (AggregateException aex)
{
    // TODO Handle exceptions.
}

if(task.IsCanceled && delayTask.IsCompleted)
{
    // TODO Display a long running error message.
}

---

将读取的文件启动到一个新线程，并在主线程中跟踪运行时间。将读取的文件启动到一个新线程，并在主线程中跟踪运行时间。@prokopchukvitaly您说过我需要计算执行某个进程的时间，这就是我的回答。我将很快回答你的另一个问题。谢谢，但我认为，它只适用于循环。我不能在所有情况下都做循环，我需要计算执行情况time@ProkopchukVitaliy你说我需要计算执行某个进程的时间，这就是我的回答。我将很快回答你的另一个问题。谢谢，但我认为，它只适用于循环。我不能在所有情况下都做循环，我需要计算执行时间，它似乎是在检查时间，只有在读了行之后，我需要像同时做一样，它似乎是在检查时间，只有在读了行之后，我需要像同时做一样

using System.Diagnostic
using System.Window.Forms

//your code
Stopwatch watch = new Stopwatch();
watch.Start();

// start reading lines of a file using file system object

watch.Stop();

if(watch.Elapsed.ElapsedMilliseconds>5000)
{
   MessageBox.Show("The process takes more than 5 seconds !!!");
}
else
{
   // your business logic
}

var cts = new CancellationTokenSource();
var task = new Task(YourLongRunningOperation, cts.Token);
task.Start();

var delayTask = Task.Delay(5000);

try
{
    await Task.WhenAny(task, delayTask);
    if(!task.IsCompleted)
    {
        cts.Cancel();
        // You can display a message here.
        await task;
    }
}
catch(OperationCanceledException cex)
{
    // TODO Handle cancelation.
}
catch (AggregateException aex)
{
    // TODO Handle exceptions.
}

if(task.IsCanceled && delayTask.IsCompleted)
{
    // TODO Display a long running error message.
}

class Program
{
    static void Main()
    {
        bool result = Task.Factory.StartNew(SomePossibleFailingTask).Wait(1000);

        if (result == false)
        {
            Console.WriteLine("Something has gone wrong!");
        }

        Console.ReadKey();
    }

    public static void SomePossibleFailingTask()
    {
        Thread.Sleep(15000);
    }
}