how convert this query to linq entity

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hi
how covert this code to lint entity

C#

select optionID,PollID,OptionText,Votes from TPollOptions
            where pollID in(select PollID from TPollquestions where Iscurrent=1 and Isarchived=0);

iam use this code but wrong

C#

var query = from p in db.pollOptions
                      where p.PollID.Contains(db.pollquestions.Where(x => x.IsCurrent == true))
                      select p;

Posted 21-Feb-15 23:13pm

saeed1364

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Vladimir Svyatski · Accepted Answer · 2015-02-21T23:41:00

Solution 1

You have to use 2 queries

C#

var idQuery = from q in db.pollquestions where q.IsCurrent select q.PollID;
var mainQuery = from p in db.pollOptions where idQuery.Contains(p.PollID) select p;

P.S. Correct syntax errors as necessary.

Posted 21-Feb-15 23:41pm

Vladimir Svyatski

Wendelius · Accepted Answer · 2015-02-22T00:11:00

Depeding on the data you may also use join. Something like this

C#

var query = from p in db.pollOptions
            join db in db.pollquestions on db.PollId equals p.PollId
            where db.Iscurrent=1 
            && db.Isarchived=0
            select p;

If that would bring duplicates one option is to select only distinct records from the query.