protected void btnSaleReport_Click(object sender, EventArgs e)
        {
            string fromDate, toDate;

            total_sale.Visible = true;
            fromDate           = datepicker1.Value;
            toDate             = datepicker2.Value;
            DataTable sale = stock.GetSalesReport(fromDate, toDate);

            sale_total.Visible = true;
            Decimal finalamount = 0;

            foreach (DataRow dr in sale.Rows)
            {
                finalamount += Convert.ToDecimal(dr["TOTAL_AMOUNT"].ToString());
            }
            Label_Total_sale.Text     = finalamount.ToString();
            SaleStockTrans.DataSource = sale as DataTable;
            SaleStockTrans.DataBind();
        }