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POWPF Data Binding in Custom Control
 

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    <p>I'm trying to create a custom TabItem that is dynamically added to a TabControl defined in a WPF Window. My custom control has an object that contains data I want to bind to specific parts of the template.</p> <pre><code>&lt;Style TargetType="{x:Type local:EntityTabItem}"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type local:EntityTabItem}"&gt; &lt;Border&gt; &lt;Grid&gt; &lt;Border x:Name="borderTop" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}"/&gt; &lt;StackPanel Orientation="Horizontal" Margin="0,0,2,0"&gt; &lt;!-- Want to bind the FileName to this TextBlock --&gt; &lt;TextBlock VerticalAlignment="Center" Text="{Binding Path=Entity.FileName}" Margin="-1,0,0,0" Padding="6,1,10,1"/&gt; &lt;Button x:Name="closeButton" VerticalAlignment="Center" Content="X" Style="{StaticResource TabCloseButton}"/&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Setter Property="ContentTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate&gt; &lt;Grid Background="White"&gt; &lt;!-- Want to bind the FileText to this TextBox --&gt; &lt;TextBox Margin="15,0,0,0" BorderBrush="{x:Null}" Text="{Binding Path=Entity.FileText}"/&gt; &lt;/Grid&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; </code></pre> <p>This is the custom control CS file:</p> <pre><code>public class EntityTabItem : TabItem { public Entity MyEntity { get; set; } public EntityTabItem(string path) { this.MyEntity = new Entity(path); } static EntityTabItem() { DefaultStyleKeyProperty.OverrideMetadata(typeof(EntityTabItem), new FrameworkPropertyMetadata(typeof(EntityTabItem))); } } </code></pre> <p>I'm fairly certain I need to setup a DataBinding/Source somewhere, but I can't figure out where to bind it for the bindings in my TextBlock to work.</p> <p>I honestly cannot wrap my head around DataBinding at all. Half the time, I get it to work just fine without realizing how, and the other half of the time it doesn't do anything.</p> <p>I tried also implementing the "Entity" object as a DependencyProperty, but could not get that to work either. As I'm only creating my custom TabItem in CS (never used directly in XAML), does this even matter?</p>
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