CountDown timer in ASP.NET for online exam paper

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I want to create a online exam aaplication in asp.net.In that case I want to create countdown timer on my first page which start by button click(without post back).The problem is when I click on button the page load event fire and timer not work anymore.
today I was successfully created a page but the timer start with page load,it's not right way.
Please help me with complete code because I am new in this programming field.
Please give me also second page code for start the timer with previous time calculation.
Urgent help me............

Posted 9-Oct-13 20:35pm

Jyoti Pandey

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Comments

Adrishya 10-Oct-13 2:41am

You can use ajax for the purpose.

Jyoti Pandey 10-Oct-13 2:48am

I know ajax but I want complete code for my question please help me.....

Siva Hyderabad 10-Oct-13 2:49am

i send link...i hope ,it is useful for you...try this.all the best

Siva Hyderabad 10-Oct-13 2:51am

it shows,your exam started time,and also which time u have..i already use this.

Jyoti Pandey 10-Oct-13 3:21am

I use your updated code and that shows error on session variable in page load event.
help me..

Jyoti Pandey 10-Oct-13 3:27am

Now I again use your code but its not working..!! Please give me code like online paper system with two pages..!!

Jyoti Pandey 10-Oct-13 7:20am

Yes,Your given code is running now...!!
Thanks alot sir..!!
Previously I think my system was created some problem gives me some server side error msg but now its working....!!
Again thanks..!!

Member 12107284 21-Nov-16 5:33am

please if you have a code then please send me this code with two pages

2 solutions

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Siva Hyderabad · Answer 1 · 2013-10-09T20:44:00

Solution 1

Countdown timer in asp.net[^]

Posted 9-Oct-13 20:44pm

Siva Hyderabad

Member 10327002 · Answer 2 · 2013-10-09T20:52:00

source code......

XML

<center>
<div>
<asp:ScriptManager ID= "SM1" runat="server"></asp:ScriptManager>
<asp:Timer ID="timer1" runat="server"
Interval="1000" OnTick="timer1_tick"></asp:Timer>
</div>

<div>
<asp:UpdatePanel id="updPnl"
runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Label ID="lblTimer" runat="server" Font-Bold="True" Font-Names="Arial"
        Font-Size="X-Large" ForeColor="#6600CC"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="timer1" EventName ="tick" />
</Triggers>
</asp:UpdatePanel>
</div>
</center>

c# code.....

write this in page load....

VB

if (!SM1.IsInAsyncPostBack)

                Session["timeout"] = DateTime.Now.AddMinutes(30).ToString();

for timer click...

C#

protected void timer1_tick(object sender, EventArgs e)
       {
           if (0 > DateTime.Compare(DateTime.Now, DateTime.Parse(Session["timeout"].ToString())))
           {
               lblTimer.Text = string.Format("Time Left: 00:{0}:{1}", ((Int32)DateTime.Parse(Session["timeout"].ToString()).Subtract(DateTime.Now).TotalMinutes).ToString(), ((Int32)DateTime.Parse(Session["timeout"].ToString()).Subtract(DateTime.Now).Seconds).ToString());
           }
           else
           {
               timer1.Enabled = true;
               Response.Redirect("Logout.aspx");

           }
       }

try this,it will work.............