ef 高级操作

一：动态拼接条件查询

var expression = PredicateBuilder.True<OQC_MES_INF_UL_QMS_OFFLINE>();
SYS_ROLES_CONFIG rule = context.SysRolesConfig.Single(t => t.ORG_ID == orgid&&t.STATE=="A");

StringBuilder sb = new StringBuilder();
sb.Append("该机身条码在与当前抽检");
if (!string.IsNullOrEmpty(rule.SYS_PARMS1)) {
//同生产工单
expression = expression.And(a => a.MO_NAME == model.WORK_ORDER_ID);
sb.Append("同生产工单、");
}

  int count = context.OQC_MES_INF_UL_QMS_OFFLINE.Get(expression).Count();

　　

二：左连接

var result1 = from a in context.OQC_ASS_PARTS_V_INF
join b in context.INV_MITEM on a.PRIMARY_ITEM_ID equals b.CODE
where a.STATE == StateConverter.Active && a.ORG_ID == ORG_ID && a.ORG_ID == b.ORG_ID && a.WIP_ENTITY_NO == WORK_ORDER_ID
select new
{
WIP_ENTITY_ID = a.WIP_ENTITY_ID,
PROID = a.PRIMARY_ITEM_NAME,
WIP_ENTITY_NO = a.WIP_ENTITY_NO,
START_QUANTITY = a.START_QUANTITY,
EATTRIBUTE1 = b.EATTRIBUTE1,
COMPLETE_DATE = a.SCHEDULED_COMPLETION_DATE,
SCHEDULE_GROUP = a.SCHEDULE_GROUP_NAME,
PRODUCTION_LINE = a.EATTRIBUTE1
};
var result2 = from a in context.OQC_ASS_PARTS_V_INF
join c in context.OQC_OMS_IF_QMS_ORDERINFO_V_INF on a.PRIMARY_ITEM_NAME equals c.MRP_ITEM_CODE
where a.STATE == StateConverter.Active && a.ORG_ID == ORG_ID && a.ORG_ID == c.ORG_ID && a.WIP_ENTITY_NO == WORK_ORDER_ID
select new
{
WIP_ENTITY_ID = a.WIP_ENTITY_ID,
CONSUME_COUNTRY = c.CONSUME_COUNTRY,
CUSTOMER_NAME = c.CUSTOMER_NAME,
CUSTOMER_CODE = c.CUSTOMER_CODE
};
var result3 = from aa in result1
join bb in result2 on aa.WIP_ENTITY_ID equals bb.WIP_ENTITY_ID
into cc
from bb in cc.DefaultIfEmpty()
select new
{
//产品编码
PROID = aa.PROID,
//生产工单
WIP_ENTITY_NO = aa.WIP_ENTITY_NO,
//工单数量
START_QUANTITY = aa.START_QUANTITY,
//产品型号
EATTRIBUTE1 = aa.EATTRIBUTE1,
//完工时间
COMPLETE_DATE = aa.COMPLETE_DATE,
//车间
SCHEDULE_GROUP = aa.SCHEDULE_GROUP,
//客户订单号
CUSTOMER_CODE = bb.CUSTOMER_CODE,
//客户名称
CUSTOMER_NAME = bb.CUSTOMER_NAME,
//销往地
CONSUME_COUNTRY = bb.CONSUME_COUNTRY,
//作业产线信息
PRODUCTION_LINE=aa.PRODUCTION_LINE
};
var rs = result3.FirstOrDefault();