private void print_Click(object sender, EventArgs e)
        {
            printSaleForm printForm = new printSaleForm();
            stockDataSet  dataSet   = new stockDataSet();

            dataSet.EnforceConstraints = false;

            viewStockReport report = new viewStockReport();

            try
            {
                adapter1.Fill(dataSet.addStock);

                adapter2.Fill(dataSet.medicine);

                report.SetDataSource(dataSet);

                printForm.crystalReportViewer1.ReportSource = report;
                printForm.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }