How Linq Context object return primary key of newly added object

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C#

objectContext.Catalog.AddObject(catalog);

            return catalog.CatalogId;

Above code snippet is written in Repository layer and adds catalog object. I want to return some integer value back to the calling function which is in Business layer. But i want to do it without calling:

objectContext.SaveChanges();

catalog.CatalogId is primary key in the table which is an identity field and set to auto increment.

Posted 4-Oct-12 21:17pm

Peeyush Pachaori

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Martin Arapovic · Answer 1 · 2012-10-04T21:28:00

Solution 1

Hi,

Your entity id, in your case "CatalogId" will have right value after inserting the entity and you need to call SaveChanges() method before you want to use it.

Posted 4-Oct-12 21:28pm

Martin Arapovic

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Peeyush Pachaori 5-Oct-12 5:00am

This was the question - How to get primay key id without SaveChanges().

Martin Arapovic 5-Oct-12 6:19am

Yes it is and I wrote that you need to call SaveChanges which means it can't be done without saving changes. As I know, object is inserted when SaveChanges method is executed, not before!!!