How can I automatically set certain entity properties. using EF Code First whenever an entity is saved to the database?

Question

There are certain cases for values that should always be updated when an object is persisted to the database. I can find no entry point for doing this other than overriding DbContext.ValidateEntity and modifying the CurrentValues property collection, but in my opinion using a validation method to modify object properties carries a very bad smell. Is there any other means of doing this?

You are right about validation - overriding validation to change property values may be dangerous (one of the reason is that detect changes is not called after validation has completed). What you can do however is to override SaveChanges and modify entities and then call base.SaveChanges to follow the regular workflow. — Pawel, Apr 08 '12 at 05:33
Check this answer http://stackoverflow.com/questions/7641552/overriding-savechanges-and-setting-modifieddate-but-how-do-i-set-modifiedby/7642041#7642041 — Eranga, Apr 08 '12 at 06:03

score 0 · Accepted Answer · edited May 23 '17 at 12:29

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Thanks to Eranga's comment above, I found this answer is a perfect fit for my question.

It describes how to override SaveChanges on my dbcontext and set the properties I would like to there.

edited May 23 '17 at 12:29

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answered Apr 23 '12 at 04:51

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How can I automatically set certain entity properties. using EF Code First whenever an entity is saved to the database?

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