private void btnxem_Click(object sender, EventArgs e) { using (quanlithucungEntities1 quanli = new quanlithucungEntities1()) { DataTable table = new DataTable(); table.Columns.Add("mahang"); table.Columns.Add("tenhang"); table.Columns.Add("slnhap"); table.Columns.Add("slban"); table.Columns.Add("tonkho"); table.Columns.Add("ngaylap"); List <Tonkho_Result> ds_hoadon = quanli.Tonkho(dtpthang.Value.Month, dtpthang.Value.Year).ToList(); foreach (var item in ds_hoadon) { table.Rows.Add(item.MaHang, item.TenHang, item.SlNhap, item.SLBan, item.TonKho, item.NgayLap); } bunifuCustomDataGrid1.DataSource = table; } }