protected void lkbEditDuration_Click(object sender, EventArgs e)
{
MasterEntries objMasterEntry = new MasterEntries();
LinkButton b = (LinkButton)sender;
int Id = Convert.ToInt32(b.CommandArgument);
TimeSpan editDuration = objMasterEntry.GetDurationById(Id);
txtEditDuration.Text = editDuration.ToString();
Session["durationId"] = Id;
popupEditDuration.Show();
}