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POWPF TabControl Header and Content not updating?
 

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  1. POWPF TabControl Header and Content not updating?
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    <p>Setup: I have a tabcontrol with 0...n tabs, and each tab is bound to a class:</p> <pre><code>class MyTabItem { string Text {get; set;} int ID {get; set;} ISet&lt;MyTabContent&gt; Contents {get; set;} } Class MyTabContent { int ID {get; set;} string Subtext {get; set;} } </code></pre> <p>Each tabitem class has many tabcontent classes in it's set. (The whole thing gets fetched via NHibernate).</p> <p>I've tried a lot of things to bind the content of MyTabItem to the header of each tabcontrol item, and the content of MyTabContent to a datagrid in the content of each tabcontrol item.</p> <p>I can display all the content in the tabs, but whenever I change properties in the bound classes, the UI does not update. I've tried to call InvalidateVisual, tried to Dispatch a Render event, tried to UpdateTarget and UpdateSource on the bindings (those last 2 threw exceptions). I've implemented INotifyPropertyChanged in my viewmodel, and even tried manually using OnPropertyChanged("MyTabItem") to no avail.</p> <p>I really don't understand why my tabcontrol contents won't update when I change properties in the bound classes. I've tried 2 different binding strategies, either works in displaying the content, but neither updates when the content changes. </p> <p>My XAML setup is:</p> <pre><code>&lt;TabControl&gt; &lt;TabControl.ItemTemplate&gt; &lt;DataTemplate DataType="models:MyTabItem"&gt; &lt;TextBlock Text="{Binding Text}" /&gt; &lt;/DataTemplate&gt; &lt;/TabControl.ItemTemplate&gt; &lt;TabControl.ContentTemplate&gt; &lt;DataTemplate DataType="models:MyTabItem"&gt; &lt;DataGrid ItemsSource="{Binding Contents}"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTextColumn Binding="{Binding Path=Subtext}" /&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; &lt;/DataTemplate&gt; &lt;/TabControl.ContentTemplate&gt; &lt;/TabControl&gt; </code></pre> <p>With that XAML setup, I simply added Items to the tabcontrol with tabcontrol.Items.Add(new MyTabItem).</p> <p>Then I tried another XAML setup where I bound the tabcontrol.Itemsource to an ObservableCollection in the code-behind. Again, the tab content did not update if the bound properties change :(</p> <p>I also tried making a CurrentItem property in the ViewModel, and used that as a Window.Resource, and then bound the Tabcontrol contents to</p> <pre><code>{Binding Source={StaticResource CurrentItem}, Path=Text} </code></pre> <p>And whenever I changed tabs I would update the CurrentItem in the viewmodel, but with that it also didn't update changes.</p> <p>I'm pretty much out of ideas :(</p>
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    1. USAether McLoud
    1. USAether McLoud
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    1. COIs that the actual code of your ViewModels? WPF doesn't support binding to `Fields`, only `properties`.
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      1. USFederico Berasategui
    2. COThey are properties in my viewmodel, I just forgot to insert the setters and getters into my pseudocode. Updated it in the question.
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      1. USAether McLoud
 

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