There is a table I want to join with different columns in different tables.

This is how so far I did this

var purchData = (from a in db.AppRequest
join e in db.Employee on a.Req_By equals e.Id
join c in db.Company on e.CompanyId equals c.Id
join d in db.Designation on e.DesignId equals d.Id
join l in db.Master_Locations on a.Req_Location equals l.Id
join dep in db.Department on e.DepId equals dep.Id
join p in db.Purchase on a.Id equals p.Req_Id
join pi in db.PurchasingItems on p.Id equals pi.Purchase_Id
join pd in db.PurchasingDetails on p.Id equals pd.Purchase_Id
join pds in db.PurchasingDetailsSup on pd.Id equals pds.PurchasingDetails_Id
join s in db.M_Supplier on pds.Supp_Id equals s.Id
join payMethod in db.Master_PayMethods on s.Pay_Method equals payMethod.Id
join poNo in db.ApprovedPoNumbers on p.Id equals poNo.Purchase_Id
where a.Id == id && pds.IsApproved == true

In db.ApprovedPoNumbers table has purchase_Id and Supplier_Id

In db.PurchasingDetailsSup table has purchase_Id and Supplier_Id

So I want to know that here join poNo in db.ApprovedPoNumbers on p.Id equals poNo.Purchase_Id line I want to join the db.ApprovedPoNumbers table purchase_Id,Supplier_Id with db.PurchasingDetailsSup table purchase_Id and Supplier_Id

CodePudding user response：

You can achieve that by building two objects with the criterias you intend to match and use the equals operator on them:

on new {poNo.purchase_Id, poNo.Supplied_Id} equals new {pds.purchase_Id, pds.Supplier_Id} into details