How to save time Interval before is ends?

Question

Hello! I have Form with a Timer1 and it set to 10Sec. There is a KeyDown event - when the user press Enter I would like to save in ans the time duration that past in the 10S interval before it ends. For Example: If i starting the timer1 now and after 3Sec I'm pressing Enter ans = 3. and if I didnt press any key ans will be equal to 10. I have this code: if (e.KeyCode == Keys.Enter) { ResponseTimeList.Add(timer1.Interval); } *ResponseTimeList is: public List ResponseTimeList = new List (); How can i improve it? Thanks.

Vulpes · Answer

I'd suggest the following:- 1. Add these private fields to your form: private DateTime lastTick; private bool enterPressed; 2. In Form_Load or wherever you start the timer add these lines: lastTick = DateTime.Now; enterPressed = false; 3. Change the code where you capture the pressing of the Enter key to this (it's assumed you only want to allow the user to press Enter once per 10 second interval); if (e.KeyCode == Keys.Enter && !enterPressed) { enterPressed = true; TimeSpan elapsed = DateTime.Now - lastTick; ResponseTimeList.Add(elapsed.TotalSeconds); } 4. Finally add these lines to the timer_Tick eventhandler: if(!enterPressed) ResponseTimeList.Add(10.0); lastTick = DateTime.Now; enterPressed = false;