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c# Programming Glossary: context.objectstatemanager.changeobjectstateInsert new object with existing object http://stackoverflow.com/questions/5416323/insert-new-object-with-existing-object after inserting objectA . You can do that by calling context.ObjectStateManager.ChangeObjectState objectB EntityState.Unchanged Example of the fist suggestion..
Update Row if it Exists Else Insert Logic with Entity Framework http://stackoverflow.com/questions/5557829/update-row-if-it-exists-else-insert-logic-with-entity-framework this if myEntity.Id 0 context.MyEntities.Attach myEntity context.ObjectStateManager.ChangeObjectState myEntity EntityState.Modified else context.MyEntities.AddObject.. e e.Id id context.MyEntities.Attach myEntity context.ObjectStateManager.ChangeObjectState myEntity EntityState.Modified else context.MyEntities.AddObject..
http://stackoverflow.com/questions/9083709/the-relationship-between-the-two-objects-cannot-be-defined-because-they-are-atta context.TrainingUczestnicies.Attach currentUczestnik context.ObjectStateManager.ChangeObjectState currentUczestnik EntityState.Modified else context.Detach.. context.Szkolenies.Attach currentSzkolenie context.ObjectStateManager.ChangeObjectState currentSzkolenie EntityState.Modified else context.Szkolenies.AddObject.. context.SzkolenieUczestnicies.Attach currentUczestnik context.ObjectStateManager.ChangeObjectState currentUczestnik EntityState.Modified else context.Detach..
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