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POCustom control ContentProperty DataBinding
 

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    <p>I'm running in a issue while trying to use dependency properties in objects which are parts of a collection, inside acustom control, collection identified with the "ContentProperty" attribute. Ok, that's quite unclear. Here is sample of my custom control : </p> <p>Here is my custom control basic definition :</p> <pre><code>[ContentProperty("SmarSearchScopes ")] public class SmartSearchCc : Control { List&lt;SmartSearchScope&gt; SmarSearchScopes {get;set;} (more code here) } </code></pre> <p>Here is the basic definition of a SmartSearchScope object :</p> <pre><code>public class SmartSearchScope : DependencyObject { public static readonly DependencyProperty ViewProperty =DependencyProperty.Register("View", typeof (ICollectionView), typeof (SmartSearchScope),new UIPropertyMetadata(null,OnViewChanged)); public static readonly DependencyProperty FilterColumnsProperty =DependencyProperty.Register("FilterColumns", typeof (IEnumerable&lt;ColumnBase&gt;), typeof (SmartSearchScope),new UIPropertyMetadata(null, OnFilterColumnsChanged)); public ICollectionView View { get { return (ICollectionView) GetValue(ViewProperty); } set { SetValue(ViewProperty, value); } } public IEnumerable&lt;ColumnBase&gt; FilterColumns { get { return (IEnumerable&lt;ColumnBase&gt;) GetValue(FilterColumnsProperty); } set { SetValue(FilterColumnsProperty, value); } } (more code here) } </code></pre> <p>All that for what ? Being able to pass a collection of SmartSearchScope objects via XAML like so :</p> <pre><code>&lt;SmartSearch:SmartSearchCc HorizontalAlignment="Stretch" Grid.Row="0" &gt; &lt;SmartSearch:SmartSearchScope FilterColumns="{Binding ElementName=CcyPairsConfigBlotter, Path=Columns}" View ="{Binding ElementName=CcyPairsConfigBlotter, Path=ItemsSource}"/&gt; &lt;SmartSearch:SmartSearchScope FilterColumns="{Binding ElementName=ClientConfigBlotter, Path=Columns}" View ="{Binding ElementName=ClientConfigBlotter, Path=ItemsSource}"/&gt; &lt;/SmartSearch:SmartSearchCc&gt; </code></pre> <p>'ClientConfigBlotter' and 'CcyPairsConfigBlotter' are just two ItemsControls which expose a 'Columns' and an 'ItemSource' d-property.</p> <p>The problem here is that althought my 2 SmartSearchScope objects gets instantiated, the databinding on the "View" and "FilterColumns" d-properties is not made and I never go througth the the associated callbacks.</p> <p>In addition, here is the output error message I got when creating the custom control.</p> <pre><code>System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=Columns; DataItem=null; target element is 'SmartSearchScope' (HashCode=56862858); target property is 'FilterColumns' (type 'IEnumerable`1') System.Windows.Data Error: 2 : Cannot find governing FrameworkElement or FrameworkContentElement for target element. BindingExpression:Path=ItemsSource; DataItem=null; target element is 'SmartSearchScope' (HashCode=56862858); target property is 'View' (type 'ICollectionView') </code></pre> <p>This is obvious that I'm missing something but I can't find what.</p> <p>I must say that, in a previous version of that control, these 2 problematic d-properties where SmartSearchCc properties and that all worked just fine.</p> <p>Thanks for your help :)</p> <p>--bruno</p>
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    1. COHi, can you not make SmartSearchScope an ItemsControl? I'd say that would simply things a lot.
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