public void BaoCaoTrePO(int id_phongban, string denngay) { PO po = new PO(); DataTable tb = po.BaoCaoTrePO(id_phongban, denngay); var js = new JavaScriptSerializer(); List <Dictionary <string, object> > parentRow = new List <Dictionary <string, object> >(); Dictionary <string, object> childRow; foreach (DataRow row in tb.Rows) { childRow = new Dictionary <string, object>(); foreach (DataColumn col in tb.Columns) { childRow.Add(col.ColumnName, row[col]); } parentRow.Add(childRow); } Context.Response.Write(JsonConvert.SerializeObject(parentRow)); }