private void btnSendForApproval_Click(object sender, RoutedEventArgs e)
 {
     if (MessageBox.Show("Are you sure you want to submit?", "Submit?", MessageBoxButton.YesNo) == MessageBoxResult.Yes)
     {
         List <Entry> entries = new List <Entry>();
         for (int i = 0; i < dgHours.SelectedItems.Count; i++)
         {
             entries.Add(dgHours.SelectedItems[i] as Entry);
         }
         queries.Approval_SubmitFor(entries);
         RefreshDGHoursFromClassList();
     }
 }