Time Difference

Question

I am creating a quiz application and I want to calculate the time elapsed between the page load and the button click.

Here is the code I am trying but unable to calculate.The timeSpan show 0(Zero) as the difference even after hours.

 

Code Start

 

protected void Page_Load(object sender, EventArgs e)

{

   if (Page.IsPostBack == false)

   {

      dtAlgebraLoad = DateTime.Now;

      lblTimeLoad.Text = "Initial time: " + dtAlgebraLoad.ToString();

   }

}

protected void btnAlgebraSubmit_Click(object sender, EventArgs e)

{

   dtAlgebraNext = DateTime.Now;

   lblTimeSubmit.Text = dtAlgebraNext.ToString();

}

protected void btnAlgebraNext_Click(object sender, EventArgs e)

{

   TimeSpan timeSpan = dtAlgebraNext.Subtract(dtAlgebraLoad);

   lblTimeDifference.Text = timeSpan.ToString();

}

 

Code End

 

Can some help me with the code.