加入使用LINQ

Question

两个表我有两个表：

PlanMaster（PlanName，PRODUCT_ID）

和

ProductPoints（ENTITY_ID，PRODUCT_ID，COM​​M1，COMM2）

现在我将Entity_ID存储到一个Session中，它是stor编入 '诠释'：

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

我想在我的LINQ查询，以显示所有从上面表格的项目具有

ENTITY_ID = getEntity

这里是我的LINQ查询：

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; 

现在，它给了我这说的错误：

不能隐式转换类型'int？' to'bool'

这里怎么回事？提前感谢您的意见！

Answer 1

尝试将其更改到

where s.Entity_ID == getEntity 

Answer 2

where s.Entity_ID = getEntity应该where s.Entity_ID == getEntity。

Answer 3

这不应该是一个双等于？

Answer 4

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; 

=不等于==

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

我认为这会做，

其中s.Entity_ID == getEntity