private void btnXem_Click(object sender, EventArgs e) { using (quanlithucungEntities1 quanli = new quanlithucungEntities1()) { DataTable table = new DataTable(); table.Columns.Add("ngaylap"); table.Columns.Add("banhang"); table.Columns.Add("nhaphang"); table.Columns.Add("luongnv"); table.Columns.Add("doanhthu"); List <DoanhThuTheoThang_Result> ds_hoadon = quanli.DoanhThuTheoThang(dateTimePicker1.Value.Month, dateTimePicker1.Value.Year).ToList(); foreach (var item in ds_hoadon) { table.Rows.Add(item.ngaylap, item.banhang, item.nhaphang, item.luongnv, item.doanhthu); } RPDoanhThu1.SetDataSource(table); crystalReportViewer1.ReportSource = RPDoanhThu1; crystalReportViewer1.Show(); } }