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How do I change the properties of database item through Entity Framework?

原文 2020-09-02 09:53:21 1 1 c#/ database/ frameworks/ entity

I would like to save the changes made to an object's properties that is saved in the DB through Entity Framework so that the id-s do not change only the properties. I tried removing it and adding it again but I get the following error: System.InvalidOperationException: 'The object cannot be deleted because it was not found in the ObjectStateManager.' I tried to set the Entity's state to modified but I get an error saying the id-s conflict with another db item (the one I want to modify, I want it to stay the same). I have not seen any modification done before so I have no idea how to do it.

Thanks for the advice

1 answers

Get the object from the database context.
Modify the object properties.
Save changes in the database context (eg _yourContext.SaveChanges() ).

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Related Question How do I return a Model from Entity Framework (Database First) that includes the Navigation Properties after the context is disposed? How do I use custom properties with the Entity Framework? How do I express a “has many through” relationship in Entity Framework 5? How do I ensure an idempotent database insert with Entity Framework 5? How do I access a MySQL database with Entity Framework How do I create database using entity framework 6 datacontext? How do I seed a database with static data using Entity Framework? How do I change the ILazyLoader implementation in Entity Framework Core 2.2? How do I change a foreign key association using Entity Framework? Using a stored procedure in entity framework, how do I get the entity to have its navigation properties populated?

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How do I change the properties of database item through Entity Framework?

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1 answers

solution1 0 2020-09-02 10:07:56

solution1
0 2020-09-02 10:07:56