csharp Epicor - 示例LINQ BPM w /一些左连接

Posted 2021-05-12

	// Get PO Lines
	var ttPOLines =
		(from pod in Db.PODetail.With(LockHint.NoLock)

		join por in Db.PORel.With(LockHint.NoLock)
			on new { pod.Company, PONum = pod.PONUM, pod.POLine } equals new { por.Company, PONum = por.PONum, por.POLine }


		join pl in Db.Plant.With(LockHint.NoLock)
				on new { por.Company, PL = por.Plant } equals new { pl.Company, PL = pl.Plant1 }


		join pc in Db.PartCost.With(LockHint.NoLock)
				on new { pl.Company, CID = pl.PlantCostID, PartNum = pod.PartNum } equals new { pc.Company, CID = pc.CostID, PartNum = pc.PartNum }

		/* Left Join on PartClass, just incase it does not exist */
		join pcl in Db.PartClass.With(LockHint.NoLock)
					on new { pod.Company, pod.ClassID } equals new { pcl.Company, pcl.ClassID }
			into pclj
		from pcl in pclj.DefaultIfEmpty()

		/* Left Join on EntityGLC, just incase it does not exist */
		join eg in Db.EntityGLC.With(LockHint.NoLock)
				on new { por.Company, ClassID = pcl.ClassID, RelatedToFile = "PartClass" } equals new { eg.Company, ClassID = eg.Key1, RelatedToFile = eg.RelatedToFile }
			into egj
		from eg in egj.DefaultIfEmpty()

		/* Left Join on GLCntrlAcct, just incase it does not exist */
		join glca in Db.GLCntrlAcct.With(LockHint.NoLock)
				on new { eg.Company, eg.GLControlCode, Context = "Inventory/Expense" } equals new { glca.Company, glca.GLControlCode, Context = glca.GLAcctContext }
			into glcaj
		from glca in glcaj.DefaultIfEmpty()

		where
			pod.Company == ttPOHeader_Row.Company
			&& pod.PONUM == ttPOHeader_Row.PONum

		select new {
			pod.PartNum, pod.XOrderQty, pod.OrderQty, pod.IUM, pod.PUM, pod.LineDesc, pod.DocUnitCost, pod.CostPerCode,
			pod.ClassID, ClassDescription = pcl != null ? pcl.Description : "",
			por.PONum, por.POLine, por.PORelNum,
			TotalStdCost = (pc.StdLaborCost + pc.StdBurdenCost + pc.StdMaterialCost + pc.StdSubContCost + pc.StdMtlBurCost),
			GLAcct = glca != null ? glca.GLAccount : ""
			/*GLAcct = tg != null ?  (tg.SegValue2 + "-" + tg.SegValue1 + "-" + tg.SegValue3 + "-" + (tg.SegValue4 != "" ? tg.SegValue4 : string.Empty) ) : ""*/
		}).ToList();