private void radioButton2_CheckedChanged(object sender, EventArgs e) { groupBox3.Visible = false; groupBox4.Visible = false; if (raOR.Checked == true) { dataGridView1.DataSource = order.ORDER_TOTAL(); CalculateTotalAmount1(); } else if (raPOR.Checked == true) { dataGridView1.DataSource = order.PURCHASE_TOTAL(); CalculateTotalAmount1(); } else { dataGridView1.DataSource = order.ITEM_TOTAL(); CalculateTotalAmount2(); } }