Question

I have tried in several ways a linq query to retrieve the last row inserted in a sql server table.

I need somenthing like this

var lastId = from u in context.sistema_Documentos where u.id == max select u;

Some people says it is not possible, some says It is not safe or affect performance drastically .. How could I perform this query?

Ps.. would be this a good approach?

var lastId = from u in context.sistema_Documentos orderby u.id descending select u.id;

Answer 1

The identity value, that you are looking for, is available after you did the SubmitChanges() method. You can read it like so:

context.InsertOnSubmit(entityToInsert);
context.SubmitChanges();
Var lastinsertedId = entityToInsert.Id;