How can I retrieve Id of inserted entity using Entity framework? [closed]

Question

I have a problem with Entity Framework in ASP.NET. I want to get the Id value whenever I add an object to database. How can I do this?

According to Entity Framework the solution is:

using (var context = new EntityContext()) {     var customer = new Customer()     {         Name = "John"     };      context.Customers.Add(customer);     context.SaveChanges();              int id = customer.CustomerID; } 

This doesn't get the database table identity, but gets the assigned ID of the entity, if we delete a record from the table the seed identity will not match the entity ID.

Answer 1

It is pretty easy. If you are using DB generated Ids (like IDENTITY in MS SQL) you just need to add entity to ObjectSet and SaveChanges on related ObjectContext. Id will be automatically filled for you:

using (var context = new MyContext()) {   context.MyEntities.Add(myNewObject);   context.SaveChanges();    int id = myNewObject.Id; // Yes it's here } 

Entity framework by default follows each INSERT with SELECT SCOPE_IDENTITY() when auto-generated Ids are used.