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c#wpfmvvmobservablecollection
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Reputation: 151

Sync ObservableCollection with EF4 Context

Pretty straightforward question... What is the most common way for programmers to synchronise the changes in an observable collection with their object context (EF4)? In my situation I have a sql ce 4.0 db using EF4 as my ORM, and I am working with an observable collection that takes objects from the database (MVVM).

Basically I want to know the most logical way to setup some code that adds, removes, modifies the object context when I am manipulating the observable collection.

Cheers

Upvotes: 0

Views: 518

Answers (2)

Kyeotic
Kyeotic

Reputation: 19857

You can subscribe to the CollectionChanged event of the ObservableCollection, and add in any EF logic to save inserts/deletions to your database model.

Upvotes: 1

Dean Chalk
Dean Chalk

Reputation: 20471

The simplest way to achieve this is to create your own custom collection class that implements INotifyCollectionChanged. By doing this you have an opportunity to add and delete entities when the collection changes. Updating entities would not be the role of the collection class, but more a function of a model wrapper or viewmodel for each entity.

Upvotes: 0

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