converting LINQ to SQL

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Hi All,

I am new to Linq and I want to convert the below LINQ query to SQL query,

C#

from m in (db.ForumMessages.Where(approved = true; AND MessageTypeID =4))
where (db.fAccesses.Where(fa => fa.ForumID == m.Forum.ForumID && db.uGroupUsers.Where(ua => ua.GroupID == fa.UserGroupID && ua.UserID == UserID).Any()).Any())
select m;

any suggestions please.

Thanks.

Posted 6-Jul-11 21:12pm

Bob_shekar

Updated 6-Jul-11 22:08pm

Tarun.K.S

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JV9999 · Accepted Answer · 2011-07-06T22:39:00

LINQPad[^] allows you to convert LINQ queries to SQL queries.

Your query probably looks something like:

<pre lang="sql">select count(1) from ForumMessages fm
inner join fAccessess a on fm.ForumID = a.ForumID
inner join uGroupUsers ua on a.UserGroupID = ua.GroupID
where fm.approved = 1 and fm.MessageTypeID = 4 and ua.UserID = "UserID"

Although you linq query should be easier written as followed:

C#

var data = 
from m in db.ForumMessages
join fa in db.fAccesses on m.Forum.ForumID equals fa.ForumID
join ua in db.uGroupUsers on fa.UserGroupID equals ua.UserGroupID
where m.approved && m.MessageTypeID == 4 && ua.UserID == UserID;

Christian Graus · Accepted Answer · 2011-07-06T21:14:00

Well, LINQ is virtually SQL in how it looks, but, is this LINQ operating on your database ? Do you not know SQL ?

select * from ForumMessages fm inner join fAccessess a on fm.ForumID = a.ForumID where fm.approved = 1 and fm.MessageTypeID = 4

That's as far as I can get. you're better off just looking at the DB and writing the SQL, instead of trying to convolute it from this. For starters, m seems to have objects as properties, I have no idea how that maps to your DB.

converting LINQ to SQL

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