C# Cancelling an aync task that has a delay

[waynieoaks]

I know this should be simple, but I am an idiot.

 

I have an async task that basically delays for 10 seconds to allow you to press Y or N 

 

        public static async System.Threading.Tasks.Task AwaitConfirmation()
        {
 
            try
            {
                AwaitingInput = true;
                Command_Debug("Task started"); //DELETE THIS
                await System.Threading.Tasks.Task.Delay(10000);
                AwaitingInput = false;
                Command_Debug("Task completed"); //DELETE THIS

            }
            catch (OperationCanceledException)
            {
                Command_Debug("Cancel accepted"); //DELETE THIS
                AwaitingInput = false;
            }
        } 

 

I then call this as follows: 
 

System.Threading.Tasks.Task AwaitInput = AwaitConfirmation();

 

The problem is when the person presses a key, the async is still running, and I cannot work out how to issue a cancel. 

 

I have read loads on Google and it just confuses me even more. 

 

I have read that I need to change the async to something like this: 

 

public static async System.Threading.Tasks.Task AwaitConfirmation(CancellationToken token)

 

But when I do that, the code I use to call doesn't work as it is expecting me to pass something. 

 

Is a clever person who knows what they are doing able to advise me in a simple way how to do this? 

Thank you in advance. 

[waynieoaks]

OK - I have managed to solve this in a roundabout way

(Probably not a good way, but it works)
 

        public static async System.Threading.Tasks.Task AwaitConfirmation()
        {
            try
            {
                Command_Debug("AwaitConfirmation Task started");
                int SecsToWait = 10; // Wait 10 seconds
                int i = 0;
                AwaitingInput = true;
                while (AwaitingInput == true)
                {
                    if (i == SecsToWait*2) // Wait 10 seconds 
                    {
                        AwaitingInput = false;
                    } else
                    {
                        await System.Threading.Tasks.Task.Delay(500);
                        i++;
                    }
                }
                Command_Debug("AwaitConfirmation Task completed"); 
            }
            catch (Exception e)
            {
                ErrorLogger(e, "AwaitConfirmation", "Error waiting for confirmation");
            }
        } 

 

By looping every 500ms for the specified amount of time (10 secs) it checks a flag and if false, exits the loop ending the wait for the keypress