How do I upsert a record in ADO.NET EF 4.1?

Question

I\'m trying to accomplish something really simple and I can\'t find how to do it using Entity Framework 4.1.

I want a controller method that accepts an object and

Answer 1

To perform an UPSERT operation, You might want to consider creating an SP that performs a MERGE.

http://www.databasejournal.com/features/mssql/article.php/3739131/UPSERT-Functionality-in-SQL-Server-2008.htm

Whatever way you choose the operation must be atomic or you'll have a race condition. Your SP will probably need a HOLDLOCK to void this ...

http://weblogs.sqlteam.com/dang/archive/2009/01/31/UPSERT-Race-Condition-With-MERGE.aspx