Sql – linq collation conflict issue

linq-to-sql

I'm using linq to SQL and when I run this query

        var lstData = from s in dataTrackDB.datas
                      join m in dataTrackDB.mkts on s.mktcode equals m.mktcode
                      join n in dataTrackDB.mktnews on m.mktcode equals n.oldmktcode
                      select new data
                      {
                          AccountDes = m.account,
                          commodity = s.commodity,
                          date = s.date,
                          daysvalid = s.daysvalid,
                          mktcode = s.mktcode,
                          mktDes = n.mktdesc,
                          price = s.price,
                          prodid = s.prodid,
                          statecode = s.statecode,
                          subcommodity = s.subcommodity,
                          supprecode = s.supprecode,
                          units = s.units
                      };

I will get "Cannot resolve the collation conflict between "SQL_Latin1_General_CP1_CI_AS" and "Latin1_General_CI_AS" in the equal to operation" . I'd be thankful if someone guide me how should I write the linq query?

Thank you

Best Answer

The problem lies in collation of your columns in Database, change them to the same collation.

setting collation on columns could affect the comparison operators in sql.

http://www.sqldbadiaries.com/2010/10/31/changing-sql-server-collation/

http://blog.sqlauthority.com/2008/12/20/sql-server-change-collation-of-database-column-t-sql-script/

Related Solutions

.net – Entity Framework vs LINQ to SQL

LINQ to SQL only supports 1 to 1 mapping of database tables, views, sprocs and functions available in Microsoft SQL Server. It's a great API to use for quick data access construction to relatively well designed SQL Server databases. LINQ2SQL was first released with C# 3.0 and .Net Framework 3.5.

LINQ to Entities (ADO.Net Entity Framework) is an ORM (Object Relational Mapper) API which allows for a broad definition of object domain models and their relationships to many different ADO.Net data providers. As such, you can mix and match a number of different database vendors, application servers or protocols to design an aggregated mash-up of objects which are constructed from a variety of tables, sources, services, etc. ADO.Net Framework was released with the .Net Framework 3.5 SP1.

This is a good introductory article on MSDN: Introducing LINQ to Relational Data

C# – the syntax for an inner join in LINQ to SQL

It goes something like:

from t1 in db.Table1
join t2 in db.Table2 on t1.field equals t2.field
select new { t1.field2, t2.field3}

It would be nice to have sensible names and fields for your tables for a better example. :)

Update

I think for your query this might be more appropriate:

var dealercontacts = from contact in DealerContact
                     join dealer in Dealer on contact.DealerId equals dealer.ID
                     select contact;

Since you are looking for the contacts, not the dealers.

Best Answer

Related Solutions

.net – Entity Framework vs LINQ to SQL

C# – the syntax for an inner join in LINQ to SQL

Related Topic