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