public void loadhdchuathanhtoan() { using (quanlithucungEntities1 quanli = new quanlithucungEntities1()) { List <hdphukienchuathanhtoan_Result> hd = quanli.hdphukienchuathanhtoan().ToList(); cbchuathanhtoan.DataSource = hd; cbchuathanhtoan.DisplayMember = "MaHD"; cbchuathanhtoan.ValueMember = "MaHD"; } }