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linq内联左联

發(fā)布時(shí)間:2023/12/2 编程问答 22 豆豆
生活随笔 收集整理的這篇文章主要介紹了 linq内联左联 小編覺(jué)得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.

內(nèi)聯(lián):沒(méi)有into

左聯(lián):有into

例子:

from GoodsStore in this.GetCurrentDbSession.Tbl_OfficeSupplies_GoodsStoreDLL.LoadEntities(a => (Guid.Empty==GoodsID?true:a.GoodsID==GoodsID))
join goods in GetCurrentDbSession.Tbl_OfficeSupplies_GoodsDLL.LoadEntities(a => (Guid.Empty == GoodsCategoryID ? true : a.GoodsCategoryID == GoodsCategoryID) && (Guid.Empty == GoodsID ? true : a.ID == GoodsID))
on GoodsStore.GoodsID equals goods.ID
join goodscategory in this.GetCurrentDbSession.Tbl_OfficeSupplies_GoodsCategoryDLL.LoadEntities(a => (Guid.Empty == GoodsCategoryID ? true : a.ID == GoodsCategoryID))
on goods.GoodsCategoryID equals goodscategory.ID
join goodsSpecifications in GetCurrentDbSession.Tbl_OfficeSupplies_GoodsSpecificationDLL.LoadEntities(a => true)
on GoodsStore.GoodsSpecificationID equals goodsSpecifications.ID
join goodsUnit in GetCurrentDbSession.Tbl_OfficeSupplies_GoodsUnitDLL.LoadEntities(a => true)
on goods.UnitID equals goodsUnit.ID into tmp1
from tt in tmp1.DefaultIfEmpty()
select new
{
GoodsID = goods.ID == null ? Guid.Empty : tt.ID,
GoodsName = goods.Name,
GoodsCategoryName = goodscategory.Name,
GoodsSpecificationID = goodsSpecifications.ID == null ? Guid.Empty : goodsSpecifications.ID,
GoodsSpecificationName = goodsSpecifications.Name,
GoodsUnitName = tt.Name,
Count= GoodsStore.Count,
ProcurementCount=GoodsStore.ProcurementCount,
ApplyCount= GoodsStore.ApplyCount
};

轉(zhuǎn)載于:https://www.cnblogs.com/liuqiyun/p/8616358.html

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