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

In most cases you do not need to explicitly set the EntityState.Modified unless you've disabled change tracking.

The solution we took was to check the value of the entity identifier:

if (entity.Id == default(int)) {
    // transient entity so insert
} else {
    // update
}