private void button_update_Click(object sender, EventArgs e)
        {
            ArrayList reportInfo = new ArrayList();

            reportInfo.Add(textBox_patientid.Text);
            reportInfo.Add(textBox_testRequest.Text);
            reportInfo.Add(textBox_testComplete.Text);
            reportInfo.Add(dateTimePicker1.Text);

            DatabaseHelperClass ob = new DatabaseHelperClass(reportInfo);

            if (ob.updateReportsData())
            {
                MessageBox.Show("Updated");
                showPatientList();
            }
            else
            {
                MessageBox.Show("Error Update");
            }
        }