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Have two entities, Customer and Contacts.

I'm saving changes with dbContext.SaveChanges();

- If I enter one row into contactDataGridView (one contact)
    * data is saved to db

- If I enter multiple rows into contactDataGridView (many contacts)
    * ERROR : Validation failed for one or more entities. 
              See 'EntityValidationErrors' property for more details.

Quote from SO question Inserting multiple rows into a table using Entity Framework

By default ObjectSet doesn't support adding lists of things, but it's easy to create your own extension method:

public static class ObjectSetExtensions
{
     public static void AddObjects<T>(this ObjectSet<T> objectSet, IEnumerable<T> objects)
     {
        foreach (var item in objects)
        {
            objectSet.AddObject(item);
        }
     }
 }

Is that answer to my problem ? Do I need to create list as the answer says?

If yes, how to do that?

Improve this question
2
  • Post some code please, as described the question is too broad/unclear. Commented Jan 20, 2014 at 16:49
  • I don't have any insert/update code. I use auto generated from entity framework. Please tell me what code do I need to put here. Commented Jan 20, 2014 at 17:12
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