How to use a countdown timer for online exam in asp.net

Question

how to use a countdown timer for online exam in asp.net server side

Rajeesh Menoth · Answer

Hi, Aspx code: Code behind code: protected void Page_Load(object sender, EventArgs e) { if (Session["CountdownTimer"] == null) { Session["CountdownTimer"] = new CountDownTimer(TimeSpan.Parse("2:30:00")); (Session["CountdownTimer"] as CountDownTimer).Start(); } } protected void Timer1_Tick(object sender, EventArgs e) { if (Session["CountdownTimer"] != null) { Label1.Text = (Session["CountdownTimer"] as CountDownTimer).TimeLeft.ToString(); } } public class CountDownTimer { public TimeSpan TimeLeft; System.Threading.Thread thread; public CountDownTimer(TimeSpan original) { this.TimeLeft = original; } public void Start() { // Start a background thread to count down time thread = new System.Threading.Thread(() => { while (true) { System.Threading.Thread.Sleep(1000); TimeLeft = TimeLeft.Subtract(TimeSpan.Parse("00:00:01")); } }); thread.Start(); } } Ref : Click here

Rahul Lakshakar · Answer

It's awesome. But i am facing a problem, How to call submit btn click or another event function when left time equals to zero ? In this timer is going in negative. Please help i tried but i did not got it. I am new in this. Thank you

Susanta Rout · Answer

It is serverside calling or clientside calling?

Susanta Rout · Answer

new CountDownTimer unable to get from V Studio editer

Susanta Rout · Answer

i am in content page now.plz check it out it is working in content page or not?

Susanta Rout · Answer

its a correct one i got the answer