private void bt_Tax_Click(object sender, EventArgs e) { bt_Product.BackColor = Color.LightGreen; bt_LoginUser.BackColor = Color.Khaki; bt_ProdType.BackColor = Color.LightGreen; bt_RFIDTags.BackColor = Color.LightGreen; bt_Tax.BackColor = Color.Yellow; bt_SysConfig.BackColor = Color.Orchid; DataAccessPOS dbPOS = new DataAccessPOS(); taxs = dbPOS.Get_All_Tax(); isProduct = false; isLoginUser = false; isPType = false; isRFIDTag = false; isSysConfig = false; isTax = true; isStation = false; isPromotion = true; dgvData_Tax_Initialize(); if (taxs.Count > 0) { foreach (var tax in taxs) { this.dgvData.Rows.Add(new String[] { tax.Code, tax.Tax1.ToString(), tax.Tax2.ToString(), tax.Tax3.ToString() }); this.dgvData.FirstDisplayedScrollingRowIndex = dgvData.RowCount - 1; } } }