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c# update collection in entity framework

Worried Wren answered on August 30, 2023 Popularity 1/10 Helpfulness 1/10

answer c# update collection in entity framework

c# update collection in entity framework

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using(var context = new AppDbContext())
{
    var entity = context.MyEntities.Include(e => e.SubEntities).FirstOrDefault(e => e.Id == someId);

    if(entity != null)
    {
        var updatedEntities = new List<SubEntity> 
        { 
            //... populate this from your incoming data 
        };

        // Remove sub-entities not in the updated list
        entity.SubEntities.RemoveAll(se => !updatedEntities.Any(ue => ue.Details == se.Details));

        // Add or update entities from the updated list
        foreach(var updated in updatedEntities)
        {
            var existing = entity.SubEntities.FirstOrDefault(se => se.Details == updated.Details);
            if(existing == null)
                entity.SubEntities.Add(updated);
            else
                existing.Details = updated.Details;  // and other properties if needed
        }

        context.SaveChanges();
    }
}

Popularity 1/10 Helpfulness 1/10 Language csharp

Source: google.com

Tags: c# entity-framework

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Contributed on Aug 30 2023

Worried Wren

0 Answers Avg Quality 2/10

c# update collection in entity framework

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