Write this SQL query in LINQ to Entity format - entity-framework-4.1

Question

I have this sql query need to convert to linq to entity
select kv.KeyID, kv.KeyVotID, v.VotID, v.FullName
from E_KeyVot kv
join E_Vot v
on kv.VotID = v.VotID
where kv.KeyID=2
order by v.FullName
This what I have tried but I'm sure it is not correct:
Public Function GetKeyVot() As IQueryable(Of Ems_KeyVot)
Try
Dim _objQuery As IQueryable(Of Ems_KeyVot, Ems_Vot) = _
From a In Context.Ems_KeyVot
Join b In Context.Ems_Vot On a.votid Equals b.votid
Where a.keyid = pub_KeyID
Order By b.FullName
Return _objQuery
Catch ex As Exception
End Try
End Function

Answer 1

Based on your query, the issue you have is that your return types don't agree with the query. The query returns an IQueryable(Of Ems_KeyVot, Ems_Vot), but your function is expecting an IQueryable(Of Ems_KeyVot).
In your query, you are projecting values from both tables. Since you can't return an anonymous type from your function, you need to create another class to return the results:
Public Class Votes
Public Property KeyID As Integer
Public Property KeyVotID As Integer
Public Property VotID As Integer
Public Property FullName As String
End Class
With that, you can modify your query as follows:
Dim _objQuery As IQueryable(Of Ems_KeyVot, Ems_Vot) = _
From a In Context.Ems_KeyVot
Join b In Context.Ems_Vot On a.votid Equals b.votid
Where a.keyid = pub_KeyID
Order By b.FullName
Select New Votes With { .KeyID = a.KeyID, .KeyVotID = a.KeyVotID, .VotID = b.VotID, .FullName = b.FullName }
Also change your function definition to
Public Function GetKeyVot() As IQueryable(Of Votes)
One other note, I see that you have a try catch block, but you aren't doing anything with the exception. If you can't handle an exception, remove the block and let it bubble up to something that can.