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    <p>The ContentList's Set method will not get called when you change a value inside the collection, instead you should be looking out for the <a href="http://msdn.microsoft.com/en-us/library/ms653375.aspx" rel="nofollow noreferrer">CollectionChanged</a> event firing.</p> <pre><code>public class CollectionViewModel : ViewModelBase { public ObservableCollection&lt;EntityViewModel&gt; ContentList { get { return _contentList; } } public CollectionViewModel() { _contentList = new ObservableCollection&lt;EntityViewModel&gt;(); _contentList.CollectionChanged += ContentCollectionChanged; } public void ContentCollectionChanged(object sender, NotifyCollectionChangedEventArgs e) { //This will get called when the collection is changed } } </code></pre> <hr> <p>Okay, that's twice today I've been bitten by the MSDN documentation being wrong. In the link I gave you it says:</p> <blockquote> <p>Occurs when an item is added, removed, changed, moved, or the entire list is refreshed.</p> </blockquote> <p>But it actually <em>doesn't</em> fire when an item is changed. I guess you'll need a more bruteforce method then:</p> <pre><code>public class CollectionViewModel : ViewModelBase { public ObservableCollection&lt;EntityViewModel&gt; ContentList { get { return _contentList; } } public CollectionViewModel() { _contentList = new ObservableCollection&lt;EntityViewModel&gt;(); _contentList.CollectionChanged += ContentCollectionChanged; } public void ContentCollectionChanged(object sender, NotifyCollectionChangedEventArgs e) { if (e.Action == NotifyCollectionChangedAction.Remove) { foreach(EntityViewModel item in e.OldItems) { //Removed items item.PropertyChanged -= EntityViewModelPropertyChanged; } } else if (e.Action == NotifyCollectionChangedAction.Add) { foreach(EntityViewModel item in e.NewItems) { //Added items item.PropertyChanged += EntityViewModelPropertyChanged; } } } public void EntityViewModelPropertyChanged(object sender, PropertyChangedEventArgs e) { //This will get called when the property of an object inside the collection changes } } </code></pre> <p>If you are going to need this a lot you may want to subclass your own <code>ObservableCollection</code> that triggers the <code>CollectionChanged</code> event when a member triggers its <code>PropertyChanged</code> event automatically (like it says it should in the documentation...)</p>
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    1. USRobert Harvey
    1. USMartin Harris
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    1. COSorry Harris, but what Event do I have to fire in EntityViewModel so that ContentCollectionChanged gets called?
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      1. USJoseph jun. Melettukunnel
    2. COGenius, works like a charm!
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      1. USJoseph jun. Melettukunnel
    3. COnote that if you don't want to implement the event management yourself, you can use a BindingList<EntityViewModel> in place of ObservableCollection<EntityViewModel>. It will then automatically forward EntityViewModel.PropertyChanged events as ListChanged events where ListChangedType == ItemChanged.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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