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PODo I need to implement INotifyPropertyChanged when using EF Code-First?
 

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  1. PODo I need to implement INotifyPropertyChanged when using EF Code-First?
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    <p>I'm noticing that when using EF CodeFirst, and binding my UI to an <code>ObservableCollection&lt;T&gt;</code> via the <a href="http://msdn.microsoft.com/en-us/library/gg696248%28v=vs.103%29.aspx" rel="nofollow"><code>DBSet.Local</code></a> property recommended <a href="http://msdn.microsoft.com/en-us/library/gg197521%28v=vs.103%29.aspx" rel="nofollow">here</a>, that the UI will update when entities are added to the DBContext but not when they are modified.</p> <p>It would seem that the <code>DBSet.Local</code> collection is not being notified that my entities have changed. When using EF Code-First do I need to implement <code>INotifyPropertyChanged</code> for all of my fields? I have not seen this in any of the examples on Code-First and it seems to go against the purpose, but perhaps I'm mistaken.</p> <p>I can post some example code if you feel that the <code>ObservableCollection</code> should be receiving change notifications and that something must be wrong in my Entity classes or something.</p> <p><strong>Edit</strong> So, just to be sure, if I have code like the following in my ViewModel</p> <pre><code>private ClientContext clientContext; private Client client; public Client Client { get { return client; } set { client = value; NotifyOfPropertyChange(() =&gt; Client); NotifyOfPropertyChange(() =&gt; Clients); } } public ObservableCollection&lt;Client&gt; Clients { get { return clientContext.Clients.Local; }} </code></pre> <p>Let's also assume my View has a Listbox with Itemssource set to Clients, and SelectedItem set to Client. I still need to implement INotifyPropertyChanged in my Model, even though I'm using it in my ViewModel?</p>
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    1. COYou would only get a change notification if the `Client` object itself is changed in your ViewModel (change of an object reference) but not when for example `Name` or `City` of the Client changes. For this you must implement change notifications on each property of your Client model class.
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