private void LoadData() { int id = 0; if (Common.LoaiNguoiDungID() == 3) { id = 0; } else if (Common.LoaiNguoiDungID() == 2) { id = Common.NguoiDungID(); } DonHang dh = new DonHang(); DataSet ds = dh.SelectByNguoiDungID(id); grdDonHang.DataSource = ds.Tables[0]; grdDonHang.DataBind(); }