private void PrepareReport()
 {
     try
     {
         string totalBuy, totalSell, numBought, numSold, bestEmp;
         DBIO.GetReportData(out totalBuy, out totalSell, out numBought, out numSold, out bestEmp);
         labelTotalBuyingMoney.Text    = totalBuy + " Tk";
         labelTotalSellingMoney.Text   = totalSell + " Tk";
         labelNumberOfDrugsBought.Text = numBought + " Item";
         labelNumberOfDrugsSold.Text   = numSold + " Item";
         labelBestEmployee.Text        = bestEmp;
     }
     catch (Exception)
     {
     }
 }