使用LINQ連接兩個表

Question

我有兩張桌子：

PlanMaster（PlanName，Product_ID）

和

ProductPoints（Entity_ID，Product_ID，Comm1，Comm2）

現在我將Entity_ID存儲到一個存儲在'int'中的Session中：

int getEntity = Int16.Parse(Session["EntitySelected"].ToString());

我想在我的LINQ查詢中顯示上面表格中的所有項目

Entity_ID = getEntity

這是我的LINQ查詢：

var td = from s in cv.Entity_Product_Points join r in dt.PlanMasters on s.Product_ID equals r.Product_ID
         where s.Entity_ID = getEntity
         select s;

現在它給我一個錯誤，上面寫着：

無法隱式轉換類型'int？' 'bool'

這里出了什么問題？ 感謝您提前的意見！

Answer 1

嘗試將其更改為

 where s.Entity_ID == getEntity

Answer 2

var td =
    from s in cv.Entity_Product_Points
    join r in dt.PlanMasters on s.Product_ID equals r.Product_ID
    where s.Entity_ID == getEntity
    select s;

=不等於==

Answer 3

where s.Entity_ID = getEntity應該是where s.Entity_ID == getEntity 。

Answer 4

難道不應該是雙等於？

Answer 5

var db1 = (from a in AccYearEntity.OBLHManifests select a).ToList();
var db2 = (from a in MasterEntity.UserMasters select a).ToList();

var query = (from a in db1
             join b in db2 on a.EnteredBy equals b.UserId
             where a.LHManifestNum == LHManifestNum
             select new { LHManifestId = a.LHManifestId, LHManifestNum = a.LHManifestNum, LHManifestDate = a.LHManifestDate, StnCode = a.StnCode, Operatr = b.UserName }).FirstOrDefault();

Answer 6

我想會這樣做，

其中s.Entity_ID == getEntity