public static QiangGouForCache SelectQiangGouToCache(Guid ActivityID) { var dt = DALQiangGou.SelectQiangGouToCache(ActivityID); if (dt == null || dt.Rows.Count == 0) { return(null); } var model = dt.ConvertTo <QiangGouForCache>()?.FirstOrDefault(); model.Products = dt.ConvertTo <QiangGouProductForCache>(); return(model); }