private async void BtnUpdateData_Click(object sender, RoutedEventArgs e)
        {
            Competency sComp     = App.tempComp;
            string     studentID = Student.UserID;
            string     qualID    = sQual.QualCode;
            string     compID    = sComp.TafeCode;
            string     status;

            if (comboStatus.SelectedIndex != -1)
            {
                status = ((ComboBoxItem)comboStatus.SelectedItem).Content.ToString();
            }
            else
            {
                status = sComp.CompletionStatus;
            }
            string comment = txbComment.Text;

            if (sComp.UpdateToDB(studentID, qualID, compID, status, comment))
            {
                var message = new MessageDialog("Update successful.");
                await message.ShowAsync();
            }

            else
            {
                var message = new MessageDialog("Update failed. Please contact admin staff");
                await message.ShowAsync();
            }
        }