How to Create linq query with two left join condition

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I want to crate a LINQ query which has two left join condition.

SQL

For Example:

Select BillMain.ID, BillMain.AccountID, BillMain.ItemID from BillMain Left Join BillSub ON BillMain.Ref = BillSub.Ref AND BillMain.Billing = BillSub.Billing

What will be query for LINQ?

Posted 25-Jun-13 9:13am

vivek.bagdai

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2 solutions

Solution 1

Have a look here: http://smehrozalam.wordpress.com/2010/04/13/linq-how-to-write-queries-with-complex-join-conditions/[^].
The idea is creating an anonymous object with the two fields on both sides, and checking their equality.

Posted 25-Jun-13 10:36am

Zoltán Zörgő

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Renju Vinod · Accepted Answer · 2013-06-25T19:05:00

Solution 2

Try this

C#

var result=from a in BillMain
join b in BillSub on new{a.Ref,a.Billing} equals {b.Ref,b.Billing} into res
from r in res.DefaultIfEmpty()
select new {ID=a.ID,AccountID=a.AccountID,ItemID=a.ItemID};

Posted 25-Jun-13 19:05pm

Renju Vinod

Updated 25-Jun-13 19:07pm

v2