当我运行下面的linq查询时报了这个错,
monospace; margin: 0em; width: 100%; background-color: #fbfbfb"> 1: var result = (from so in svcContext.new_sales_orderSet
2: join soitem in svcContext.new_sales_order_itemSet on so.Id equals soitem.new_sales_orderid.Id
3: join fpitem in svcContext.new_fp_itemSet on soitem.new_modelid.Id equals fpitem.new_modelid.Id
4: join fp in svcContext.new_floor_priceSet on fpitem.new_fp.Id equals fp.Id
5: where so.Id == currentEntity.Id
6: && soitem.new_invoice_price > fpitem.new_floor_price
7: select (soitem.new_invoice_price - fpitem.new_floor_price) * soitem.new_qty
8: ).ToList();
找了半天原因,才发现是这里的原因:
&& soitem.new_invoice_price > fpitem.new_floor_price
因为这二个字段都是Decimal?,有些值是null,比较起来就报错了。
把这个条件去掉,然后再加上where条件就可以了:
var result = query.Where(q => q != null && q.Value > 0).ToList();