protected void dropdownFYear_SelectedIndexChanged(object sender, EventArgs e)
        {
            Session["lastSelectedCountryIndex"] = dropdownFYear.SelectedIndex;
            string    selectedText1 = dropdownFYear.SelectedItem.Text;
            string    a1 = "";
            string    a2 = "";
            string    a3 = "";
            string    a4 = "";
            DataTable dt, dt1, dt2 = new DataTable();

            dt2 = ddo.TotalDutyAmnt(selectedText1);
            string l3 = dt2.Rows[0][0].ToString();

            if (l3 == "")
            {
                Label3.Text = "0";
            }
            else
            {
                Label3.Text = Math.Round(Convert.ToDecimal(l3), 2).ToString();
            }
            dt1 = ddo.FilterInvoiceMaster(selectedText1, a1, a2, a3, a4);
            int b = dt1.Rows.Count;

            if (b > 0)
            {
                Label2.Text = b.ToString();
            }
            else if (b == 0)
            {
                Label2.Text = "0";
            }
            dt = ddo.GetFY(selectedText1);
            int a = dt.Rows.Count;

            if (a > 0)
            {
                Label1.Text = a.ToString();
            }
            else if (a == 0)
            {
                Label1.Text = "0";
            }
        }