摘要：
统计合计是有null值的处理例子： decimal ? allIn = (from b in db.ST_BillInDetail join sb in db.ST_Bill on b.billId equals sb.id where (sb.billDate >= startDate && sb.billDate <= endDate && sb.depotId == depotID && sb.billType == (int)ST_BillType.IN ) ... 阅读全文
