private void diplay_dtgvc_ds() { DataTable table = new DataTable(); table.Columns.Add("ID", typeof(int)); table.Columns.Add("LyDo", typeof(string)); table.Columns.Add("Nguoi Lap", typeof(int)); if (cob2.SelectedIndex == 0) { List <DonNhapHang> list = DonNhapHang_BUL.getAllList(); foreach (DonNhapHang dnh in list) { table.Rows.Add(dnh.ID, dnh.LyDo, dnh.NguoiLap); } } else if (cob2.SelectedIndex == 1) { List <DonTraHangCC> list = DonTraHangCC_BUL.getAllList(); foreach (DonTraHangCC dnh in list) { table.Rows.Add(dnh.ID, dnh.LyDo, dnh.Nguoilap); } } dtgv_ds1.DataSource = table; }