[英]filter a linq query based on the results of another query's results
I am wanting to filter a linq query 我想过滤一个linq查询
I have 2 linq statements 我有2个linq语句
The 1st gets all the stores I want and the 2nd is where I filter information based on the results found in the 1st query. 第一个获取我想要的所有商店,第二个是我根据第一个查询中找到的结果过滤信息的地方。
var stores = ctx.Stores.Where(ps => ps.ParentStoreID == parent.ParentStoreID && ps.StoreID!=storeID);
var query = (from a in ctx.TransactionTable
from b in ctx.MappingTable.Where(x => x.TransactionId== a.TransactionId).DefaultIfEmpty()
where a.StoreID!=storeID
select new
{
Transactions = a,
Mapping = b
}).ToList();
How do I add another where clause into my 2nd query to only return results where a.StoreId is contained within the stores result? 如何在第二个查询中添加另一个where子句,仅返回存储结果中包含a.StoreId的结果?
Like this: 像这样:
var stores = ctx.Stores.Where(ps => ps.ParentStoreID == parent.ParentStoreID && ps.StoreID!=storeID);
var query = (from a in ctx.TransactionTable
from b in ctx.MappingTable.Where(x => x.TransactionId==a.TransactionId).DefaultIfEmpty()
where a.StoreID!=storeID && stores.Select(s => s.StoreID).Contains(a.StoreID)
select new
{
Transactions = a,
Mapping = b
}).ToList();
You can find more info here: Linq to Entities - SQL "IN" clause 您可以在此处找到更多信息: Linq to Entities - SQL“IN”子句
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