Question

How do I convert the following query into linq to sql query?

    select 
invoice.id, web_users.id, web_users.first_name, web_users.last_name,web_users.email_address 
from attendees,web_users
join invoice where attendees.invoice_id=invoice.id and invoice.seminar_id=6 and attendees.web_user_id=web_users.id

this is what I had but it is throwing an error:

from att in context.Attendees
                          from webUsers in context.WebUsers
                          join invoice in context.Invoice
                          on att.InvoiceID equals invoice.ID                          
                          where invoice.SeminarID == seminarId &&
                          webUsers.ID == att.WebUserID                                       
                          select new
                          {
                              webUsers.FirstName,
                              att.InvoiceID                                                       
                          };

Thanks in advance.

Answer 1

Try:

from att in context.Attendees
                          join webUsers in context.WebUsers
on att.web_user_id equals webUsers.id
                          join invoice in context.Invoice
                          on att.InvoiceID equals invoice.ID                          
                          where invoice.SeminarID == seminarId                                       
                          select new
                          {
                              webUsers.FirstName,
                              att.InvoiceID                                                       
                          };