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POSet dependency properties in XAML when the base class is generic
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  1. POSet dependency properties in XAML when the base class is generic
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    copied!<p>As per the title really, how can you set a dependency property in XAML when the base class is generic? When trying to do this I get a NullReferenceException, setting the property from code behind works fine. It also works when the base class is not generic. I'm using .NET4</p> <p>Here is some sample code to demonstrate:</p> <p><strong>WindowBase.cs</strong></p> <pre><code>using System.Windows; namespace GenericDependencyPropertyTest { public class WindowBase&lt;ViewModel&gt; : Window { public static readonly DependencyProperty HeaderProperty = DependencyProperty.Register( "Header", typeof(string), typeof(WindowBase&lt;ViewModel&gt;), new PropertyMetadata("No Header Name Assigned")); public string Header { get { return (string)GetValue(HeaderProperty); } protected set { SetValue(HeaderProperty, value); } } protected virtual ViewModel Model { get; set; } } } </code></pre> <p><strong>MainWindow.xaml</strong></p> <pre><code>&lt;local:WindowBase x:Class="GenericDependencyPropertyTest.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:GenericDependencyPropertyTest" x:TypeArguments="local:IMyViewModel" Title="MainWindow" Height="350" Width="525" Header="Test"&gt; &lt;Grid&gt; &lt;/Grid&gt; &lt;/local:WindowBase&gt; </code></pre> <p><strong>MainWindow.xaml.cs</strong></p> <pre><code>namespace GenericDependencyPropertyTest { /// &lt;summary&gt; /// Interaction logic for MainWindow.xaml /// &lt;/summary&gt; public partial class MainWindow : WindowBase&lt;IMyViewModel&gt; { public MainWindow() { InitializeComponent(); } protected override IMyViewModel Model { get { return base.Model; } set { base.Model = value; } } } } </code></pre> <p><strong>IMyViewModel.cs</strong></p> <pre><code>namespace GenericDependencyPropertyTest { public interface IMyViewModel { } } </code></pre>
 

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