how to calculate time taken to complete the online exam using timespan in asp.net

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i have captured the time when examination was started in page_load event.

DateTime ExmStartTym = DateTime.Now();

when exam ends i want to calculate the time the examinee has taken.
here i am using TimeSpan Class object to do this..
please help me to do this...

protected void btnend_Click(object sender, EventArgs e)
   {
       try
       {
           UpdateAnswers();
           TimeSpan timeTkn =
           Response.Redirect("~/examend.aspx?totQn='"+lblTotQns.Text+"'&timeTkn='"++"'");
       }
       catch (Exception)
       {

       }
   }

Posted 29-Nov-13 1:04am

Member 9822231

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3 solutions

Solution 1

Simple:

C#

Timespan diff = dateTimeEnd - dateTimeStart;
string timeTaken = string.Format("{0} hours and {1} minutes", diff.Hours + diff.Days * 24, diff.Minutes);

Posted 29-Nov-13 1:12am

OriginalGriff

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Tejas Sawant 13 · Accepted Answer · 2013-11-29T23:40:00

Solution 3

i done it c# Windows form application i hope this will helpful for you

/* When click on start button */
DateTime from = DateTime.Now;

/* when click on end button */
DateTime to = DateTime.Now;

/* total time */
TimeSpan total = to - from ;

string totalime = to.ToString("t");

/* In seconds  */
string totaltime = total.TotalSeconds.ToString();

If you want in minutes or hours there is different methods like totalminutes etc

Posted 29-Nov-13 23:40pm

Tejas Sawant 13

Updated 29-Nov-13 23:41pm

v2

Comments

[no name] 30-Nov-13 5:58am

thanks. Finally i did this and your ideas helped me alot. i used below code to do this in my asp.net apps.
DateTime exmStTym = Convert.ToDateTime(Session["ExmStartTym"]);
DateTime exmEndTym = DateTime.Now;
TimeSpan timeTkn = exmEndTym.Subtract(exmStTym);

[no name] 1-Dec-13 2:42am

good friend ,thanks for reply

Nick Ginis · Accepted Answer · 2013-11-29T01:15:00

Solution 2

Get the Start time at beginning of exam:

eg:

C#

TimeSpan examStartTime = DateTime.Now.TimeOfDay();

When the End button is clicked, get the current time again:

eg:

C#

TimeSpan examEndTime = DateTime.Now.TimeOfDay();

Then use TimeSpan to work out the difference by substracting the start time from the end time:

eg:

C#

TimeSpan duration = examEndTime.Subtract(examStartTime);

Posted 29-Nov-13 1:15am

Nick Ginis

Updated 29-Nov-13 23:59pm

v2

Comments

[no name] 30-Nov-13 2:38am

i tried the above code
Datetime examStartTime = DateTime.Now.TimeOfDay(); it gives compile time error "cannot convert Timespan to Datetime". then i modified the code for explicit conversion
ExmStartTym = Convert.ToDateTime(DateTime.Now.TimeOfDay); then it throws exception.
Unable to cast object of type 'System.TimeSpan' to type 'System.IConvertible'.

Nick Ginis 30-Nov-13 5:58am

My fault. TimeOfDay() returns a TimeSpan so just declare it as one instead of DateTime. Will edit answer to reflect that.

[no name] 30-Nov-13 6:01am

thanks. Finally i did this and your ideas helped me alot. i used below code to do this in my asp.net apps.
DateTime exmStTym = Convert.ToDateTime(Session["ExmStartTym"]);
DateTime exmEndTym = DateTime.Now;
TimeSpan timeTkn = exmEndTym.Subtract(exmStTym);