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POBinding dependency property using XAML
 

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    <p>Inside my user control MainControl I have dependency property named Repository. I want to bind this repository property in MainWindow using xaml</p> <pre><code>&lt;my:MainControl x:Name="mainControl" Repository="{Binding }" Visibility="Visible" /&gt; </code></pre> <p>and inside MainWindow.xaml.cs I have</p> <pre><code>public MainWindow() { InitializeComponent(); _repository = new CarRepository(); DataContext = _repository; } </code></pre> <p>Inside MainControl constructor I was thinking to display some text using </p> <pre><code>public MainControl() { InitializeComponent(); lblCountCars.Content = string.Format("there is {0} cars.", Repository.CountAllCars()); } </code></pre> <p>Am I doing something wrong here <code>Repository="{Binding }"</code>? When I register user control inside code behind everything is ok but I want to learn how to do this using xaml.</p> <p><strong>Update</strong> To make it clear. I have <code>MainWindow</code> which uses two user controls. <code>MainControl</code> and <code>TreassureControl</code>. I want to send repository which is of type <code>ICarRepository</code> to any of this controls, so I created DependencyProperty named <code>Repository</code> of type <code>ICarRepository</code> both in <code>MainControl</code> and <code>TreassureControl</code>.</p> <p>My goal is to send repository instance to <code>MainControl</code> <code>Repository</code> property (DP) and to print on label Content property <code>lblCountCars.Content = Repository.CountAllCars();</code> </p> <p>Also I want this repository instance in user control to further work, not only to show simple text.</p> <p>So I tried with suggestions bellow</p> <p>MainWindow.xaml</p> <pre><code> &lt;my:MainControl x:Name="mainControl" Repository="{Binding Repository}" /&gt; </code></pre> <p>MainWindow.xaml.cs</p> <pre><code>private ICarRepository _repository; public MainWindow() { InitializeComponent(); _repository = new CarRepository(); DataContext = _repository; } </code></pre> <p>MainControl.xaml</p> <pre><code>&lt;UserControl x:Name="mainControl"&gt; &lt;Label Name="lblCountBooks" Content="{Binding ElementName=mainControl, Path=Repository.CountAllBooks()}" &lt;ItemsControl ItemsSource="{Binding ElementName=mainControl, Path=Repository}" /&gt; </code></pre> <p>MainControl.xaml.cs</p> <pre><code>public static readonly DependencyProperty RepositoryProperty = DependencyProperty.Register( "Repository", typeof(ICarRepository), typeof(MainControl), new PropertyMetadata(null)); public ICarRepository Repository { get { return (ICarRepository)GetValue(RepositoryProperty); } set { SetValue(RepositoryProperty, value); } } </code></pre> <p>label content is not updated with expected content.</p>
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    1. COpls post your relevant xaml for your MainControl, maybe the code for your DP too
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