private void cbProductType_TextChanged(object sender, EventArgs e) { dgvProStock.DataSource = cntrl_sell.check_ProductInStock_OnProductType(cbProductType.Text); String[] h = { "ລະຫັດສິນຄ້າ", "ຊື່ສິນຄ້າ", "ປະເພດສິນຄ້າ", "ລາຄາ", "ຈຳນວນຍັງເຫຼຶອ", "ຫົວໜ່ວຍ" }; cntrl_col.change_columnsname(dgvProStock, h); }