[英]How to do a Group by while joining three tables in LINQ C#
我試圖在LINQ中加入三個表時進行分組。 下面是我的代碼。 關於如何執行此操作的任何建議將對您有很大的幫助。
var result = (from cm in DB.BRAND_NAME_MAP_COMMENTs
join R in DB.BRAND_NAME_MAP_MASTERs on cm.BRAND_NAME_MAP_ID equals R.BRAND_NAME_MAP_ID
join K in DB.V_BRANDNAME_INGREDIENT_MAPs on R.BRAND_NAME_MAP_ID equals K.BRAND_NAME_MAP_ID
orderby cm.UPDATED_TS descending
group K.PFC_DESC by K.RAND_NAME_MAP_ID into L //this where the problem is
select new WorkflowComment
{
NAMEVersion = L.PFC_DESC + "-" + K.PFC_VERSION,
BRAND_NAME = R.BRAND_NAME,
HC_BRAND_NAME = R.HC_BRAND_NAME,
NAME = K.PFC_DESC,
//VERSION = K.PFC_VERSION,
COMMENTS = cm.COMMENTS.Replace("\n", "<br />"),
UPDATED_BY = cm.UPDATED_BY,
UPDATED_TS = cm.UPDATED_TS
}).ToList();
只是檢查一下,如果您閱讀了以下鏈接: LINQ:合並聯接和分組依據
我覺得這是您面臨的同樣問題。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.