Correct way to catch the exception // CancellationTokenSource

Question

Correct way to catch the exception // CancellationTokenSource

Markus Freitag 3,791

Hello, I want to trigger a cancel. (Thread, Task, Timer) What is the correct way to catch the exception. There are so many possibilities. Which way is the best? What's your experience?

void GetDataFromServer(int serverNumber, CancellationToken token)
{
	for (int i = 0; i < 10; i++)
	{
		try
		{
			if (token.IsCancellationRequested)
			{
				Trace.WriteLine("Canceled while running.");
				token.ThrowIfCancellationRequested();
			}
			++TestPanel.No;
			// Make work
			Thread.Sleep(1000);
		}
		catch (OperationCanceledException)
		{
			Interlocked.Exchange(ref Process, 0);
			Trace.WriteLine("The wait operation was canceled.");
			throw;
		}
	}

	StartManualResetEvent.Set();

	Interlocked.Exchange(ref Process, 0);
}

Anonymous

2023-06-01T08:49:36.02+00:00

You can also use CancellationToken.ThrowIfCancellationRequested() without catching the exception: you can remove the try-catch block entirely and rely on ThrowIfCancellationRequested() to throw the exception directly. This simplifies code and allows exceptions to propagate up the call stack for centralized processing.

Handling cancellation via CancellationToken.Register(): Instead of explicitly checking for cancellation on each iteration, you can use the CancellationToken object's Register() method to register a callback method. This callback will be called when cancellation is requested, allowing you to handle cancellation logic without throwing exceptions.
Markus Freitag 3,791 Reputation points

2023-06-01T16:57:52.3666667+00:00

https://learn.microsoft.com/en-us/answers/questions/1295964/task-thread-timer-concept

Please help me in this thread or we will lose the overview. Thanks in advance.
Anonymous

2023-06-02T01:53:11.37+00:00

If you think my comment solved your problem, I will turn it into an answer.
Markus Freitag 3,791 Reputation points

2023-06-02T05:50:55.86+00:00

I don't know. I want to do it right for my example. Do you have a specific example available?
Anonymous

2023-06-02T09:40:38.5066667+00:00

You can refer to these cases:CancellationToken.ThrowIfCancellationRequested() and CancellationToken.Register(MyMethod). In what cases the method may not be called Methods execution order

Your answer

Anonymous

2023-06-01T08:49:36.02+00:00

You can also use CancellationToken.ThrowIfCancellationRequested() without catching the exception: you can remove the try-catch block entirely and rely on ThrowIfCancellationRequested() to throw the exception directly. This simplifies code and allows exceptions to propagate up the call stack for centralized processing.

Handling cancellation via CancellationToken.Register(): Instead of explicitly checking for cancellation on each iteration, you can use the CancellationToken object's Register() method to register a callback method. This callback will be called when cancellation is requested, allowing you to handle cancellation logic without throwing exceptions.
Markus Freitag 3,791 Reputation points

2023-06-01T16:57:52.3666667+00:00

https://learn.microsoft.com/en-us/answers/questions/1295964/task-thread-timer-concept

Please help me in this thread or we will lose the overview. Thanks in advance.
Anonymous

2023-06-02T01:53:11.37+00:00

If you think my comment solved your problem, I will turn it into an answer.
Markus Freitag 3,791 Reputation points

2023-06-02T05:50:55.86+00:00

I don't know. I want to do it right for my example. Do you have a specific example available?
Anonymous

2023-06-02T09:40:38.5066667+00:00

You can refer to these cases:CancellationToken.ThrowIfCancellationRequested() and CancellationToken.Register(MyMethod). In what cases the method may not be called Methods execution order

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Correct way to catch the exception // CancellationTokenSource

Your answer