Hi all,

I need to display the countdown timer for the purpose of online quiz.

Give me the solution on this post.

I see two options for you.

1.) Use a client-script based timer and just submit the completed portion of the test whe the timer runs out.  Here's an example:

http://www.javascript-page.com/timer.html

Of course, this approach brings with it the possibility of the user jacking with your javascript and giving themselves more time than is normally alloted.  Depending on who you are resting and their technical savvy, this may be an issue.

2.) Set an absolute time on the server that identifies the last possible time when a user can submit their answers.  Then submit the user's data periodically using an ajax call and check the current time against the absolute time to see if the users updated information was submitted in a valid time period.  This would eliminate someone's ability to give themselves additional time, but it is a more technical solution. 

- Damon

Hi

I have used the same scenario of my script, but the time will be changing randomly. While clicking on any in aspx page the time will be changing at the moment, So i have one hidden field in aspx page and  I have assigned the time value in particular hidden field, but it throw this exception "Object reference not set to an instance of an object".

I have assigned the hidden field value in codebehind:

hidfield.Value=Cstr(10)  'hidfield is hidden field

but it is not working. If any other method to assign value in hidden field.

That's how you assign the value, but the page is apparently not finding the hidfield control.  You're getting an object reference error when you attempt to access the Value field from the hidField object because the hidField is NOT referencing an actual object.  If it was, then your assignment should work.

It is an ASP.NET control, correct?  Like <asp:HiddenField runat="server" id="hidField" /> ?

No that is html control.

<INPUT id="hidfield" style="Z-INDEX: 101; LEFT: 344px; POSITION: absolute; TOP: 48px" type="hidden" value="">  This is folowing tag.

above i have assigned the value directly it is accessed but through code behind it is not accessing.

I have used in single page.

This is complete scenario:

I have conduct one quiz program in online. That quiz have 10 questions, each question have duration 1 minute or 2 minutes,  totaly 10 minutes. but the question displaying one by one. when user attends the first question clicking on next button the new question displaying, at the same time particular question time also displaying. suppose i have assigned particular question time 1 minute, if time is expired automatically next question displaying.

You cannot access HTML from your code behind unless your tag has been marked with Runat=server.  So, you can do any of the following

1.) Add a runat=server tag and see if you can set the value in your code behind

2.) Use the <asp:HiddenField> control so you can access the item from your code behind

3.) Use inline script to set the value using a property from your page, e.g.
<INPUT id="hidfield" type="hidden" value="<%=HiddenTimeValueProperty%>">

Also know, however, that if you are moving from one page to another page, the hidden field is NOT going to automatically follow from one page to the next. If you are staying on the same page, you should be good to go automatically.

I am trying to your suggestion. after that i will let you know.

I appreciate your help...

I got the solution. I am using this method.

<%
  Dim TimeVal As String=Session("Time")
  %>
<INPUT id="hidfield" type="hidden" value="<%=TimeVal%>"></CENTER>

the above lines in inline coding.

In code behind

Session("Time")=1

so this value to pass the inline coding.

Thankz damon....

Hi again

I have one method in code behind named as countquestion(), how can i call this method from java script.

If any idea.

You need to implement a client-side callback.  Check out the following article.

http://www.dotnetjunkies.com/Article/E80EC96F-1C32-4855-85AE-9E30EECF13D7.dcik

hi

I have call codebehind method like <%QuestionAdd()%>, but it is not firing. also use this   method        <%=QuestionAdd%>, but not firing what to do.

What does the QuestionAdd() method do exactly?  Does it return a string?  Does it add controls to the page?

If you are trying to modify control on the page, then you need to call the method from your code behind, not as inline script. 

For the most part, you don't want to use the inline script on your web page, you want to use the code-behind model.  So you should be calling QuestionAdd from inside your code behind, and it should do something to modify the controls on the page.

"QuestionAdd()" function doesnot return any value. This function main theme to select the next question and display that question in same page "quiz.aspx".

the next question displaying 3 ways.

1) user clicking on next button. This is server control.

2)user clicking on skip button. This is server control.

3) current question duration is over automatically displaying the next question. so when the countdown timer reached at 00:00, the question time is over so it displaying next question. Here I need to call the "QuestionAdd()" method.