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POBinding between UserControl and MainWindow issue
 

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    <p>I'm missing something in this binding because it doesn't work. This is for learning purposes, if you see how this can be improved please tell me. But besides that I'm also interested in know why this is not working.</p> <p>In my <code>MainWindow</code> there is a <code>CheckBox</code> with a command bound to it: <code>checkCommand</code>.</p> <p>In <strong>RootViewModel.cs</strong>:</p> <pre><code> public Command checkCommand { get; set; } public RootViewModel() { checkCommand = new Command(mark); } private void mark() { myThingsCollection[0].marked= true; } </code></pre> <p>This command is working properly, and it also changes the state of <code>marked</code> to <code>true</code> (I've tested this with a <code>MessageShowBox</code>).</p> <p>I've previously added the UC to a <code>ObsevableCollection&lt;UC&gt;</code> (<code>myThingsCollection</code>) and bound it to a <code>ItemsControl</code> this way in <strong>MainWindow.cs</strong></p> <pre><code>&lt;ItemsControl ItemsSource="{Binding myThingsCollection}"&gt; &lt;DataTemplate&gt; &lt;!--I've ommited some parts here--!&gt; &lt;local:UC/&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; </code></pre> <p>The UC is displayed correctly.</p> <p><code>marked</code> is a property of the <code>UCViewModel</code>:</p> <pre><code>class UCViewModel { #region Implementation of INotifyPropertyChanged private bool _marked; public bool marked { get { return _marked; } set { _marked= value; OnPropertyChanged("marked"); } } } </code></pre> <p>That <code>UserControl</code> (<code>UC</code>) has a <code>CheckBox</code> that I bind this way:</p> <pre><code> &lt;CheckBox Content="Hello!" IsChecked="{Binding marked}"/&gt; </code></pre> <p>And set the <code>DataContext</code> this way (in the code behind <strong>UC.cs.xaml</strong>)</p> <pre><code> public UC() { UCViewModel context = new UCViewModel(); DataContext = context; InitializeComponent(); } </code></pre> <p>But it doesn't work. I don't know what it's missing. By the way I'm pretty sure that this is not a good approach to this problem, is there an easier way? Thanks</p>
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    1. CO-.- *[...] But it doesn't work. [...]* - Very useful, it's like "my application is crashing". Come on, you have to deliver more details. Are you getting any `BindingExpression` errors in your debug output window in VS? Btw, `Command` is this a custom class?
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    2. COYes, Command is a custom class enabling the Commands. I'm not able to see the BindingExpression errors. I'll check again.
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    3. COI've set the DataBinding Trace to "All" in Settings, Output Window. But I can't find where that errors are displayed. Are they shown in the same place as the normal errors? If so, there isn't any error.
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