private void buttonX3_Click(object sender, EventArgs e) { try { if (this.dataGridView1.SelectedRows.Count == 1) { dataGridView1.CurrentRow.Cells["cal_qty"].Value = (Convert.ToDecimal(dataGridView1.CurrentRow.Cells["cal_qty"].Value) - 1); decimal cost = Convert.ToDecimal(dataGridView1.CurrentRow.Cells["cal_cost"].Value); decimal quantitys = Convert.ToDecimal(dataGridView1.CurrentRow.Cells["cal_qty"].Value); decimal total = quantitys * cost; dataGridView1.CurrentRow.Cells["cal_total"].Value = total; calculate_total(); // tax_calcu(); DataTable dt = blord.getallfromorder_id(Convert.ToInt32(dataGridView1.CurrentRow.Cells["cal_order_id"].Value)); if (dt.Rows.Count > 0) { minus_click = true; } } else { MessageBox.Show("Please select row first or select only one row"); } } catch (Exception ex) { throw ex; } }