Compilation Error in the linq query

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Hi all,
When i am using the following query in my code i am getting compilation error stating that "a query body must end with a select clause or group clause"
Could any one please help me out where i went wrong syntactically

This is my query

C#

var query = from i in dbContext.User_details
                                join j in dbContext.User_addresses on i.Userid equals j.Userid
                                join k in dbContext.Userworkdetails on j.Userid equals k.Userid
                                join l in dbContext.Useredudetails on k.Userid equals l.Userid
                            

        if (!string.IsNullOrEmpty(FirstName))
             query = query.Where(u => u.FirstName == FirstName);

             if (!string.IsNullOrEmpty(LastName))
             query = query.Where(u => u.LastName == LastName); 

        

        var results = from r in query.ToList()
                      select new
                                  {
                                      
                                     
                                      Firstname = i.Firstname,
                                      lastname = i.Lastname
                                  }.ToArray();

Thanks

Posted 14-May-12 23:46pm

Sahithi Pinisetty

Updated 14-May-12 23:50pm

Prasad_Kulkarni

v2

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VJ Reddy · Answer 1 · 2012-05-15T00:08:00

Solution 1

Please try this

C#

var results = from i in dbContext.User_details
        join j in dbContext.User_addresses on i.Userid equals j.Userid
        join k in dbContext.Userworkdetails on j.Userid equals k.Userid
        join l in dbContext.Useredudetails on k.Userid equals l.Userid
        where(u => u.FirstName == 
                !string.IsNullOrEmpty(FirstName) ? Firstname : LastName)
        select new {
                 Firstname = i.Firstname,
                 Lastname = i.Lastname
        }.ToArray();

It may be helpful

Posted 15-May-12 0:08am

VJ Reddy

Comments

Sahithi Pinisetty 15-May-12 6:25am

Actually in my code i have nearly 10 fields.The above code will be valid with only two values i.e firstname and lastname i suppose

Maciej Los 15-May-12 10:22am

Yes, but you can change it. It's an example.

Maciej Los 15-May-12 10:22am

Very good answer, my 5!

VJ Reddy 15-May-12 10:25am

Thank you very much, losmac :)