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POSet a property from type 'type' with global style in XAML
 

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    <p>I would like to set a dependency property from type 'Type' in xaml. This will work fine but when I set this value in an implicit or explicit styling then a exception will thrown (unhandled exception).</p> <p>I created an empty Silverlight application and added a user control (DataFormControl). Here is the code behind of this control:</p> <pre><code> public DataFormControl() { InitializeComponent(); } public static readonly DependencyProperty TitleProperty = DependencyProperty.Register("Title", typeof(string), typeof(DataFormControl), null); public string Title { get { return (string)GetValue(TitleProperty); } set { SetValue(TitleProperty, value); } } public static readonly DependencyProperty TypeToReflectProperty = DependencyProperty.Register("TypeToReflect", typeof(Type), typeof(DataFormControl), null); public Type TypeToReflect { get { return (Type)GetValue(TypeToReflectProperty); } set { SetValue(TypeToReflectProperty, value); } } public string GetCombo() { string returnValue = (Title ?? "no title") + " ; " + (TypeToReflect != null ? TypeToReflect.Name : "unkown Type"); return returnValue; } private void Refresh_Button(object sender, RoutedEventArgs e) { this.ResultBox.Text = GetCombo(); } </code></pre> <p>And here the XAML code:</p> <pre><code>&lt;Grid x:Name="LayoutRoot"&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Button Click="Refresh_Button"&gt;Refresh&lt;/Button&gt; &lt;TextBlock x:Name="ResultBox" /&gt; &lt;/StackPanel&gt; &lt;/Grid&gt; </code></pre> <p>Now the problem occurres in a control which reference this and use global styling:</p> <pre><code>&lt;StackPanel&gt; &lt;StackPanel.Resources&gt; &lt;Style TargetType="local:DataFormControl"&gt; &lt;Setter Property="Title" Value="Implicit Name" /&gt; &lt;Setter Property="TypeToReflect" Value="local:DataFormControl" /&gt; &lt;/Style&gt; &lt;/StackPanel.Resources&gt; &lt;TextBlock FontWeight="Bold"&gt;Test App&lt;/TextBlock&gt; &lt;local:DataFormControl Title="123" /&gt; &lt;local:DataFormControl Title="Kuh" /&gt; &lt;local:DataFormControl TypeToReflect="local:DataFormControl" /&gt; &lt;local:DataFormControl /&gt; &lt;/StackPanel&gt; </code></pre> <p>If I remove the "TypeToReflect"-Setter then all work fine. The global styling for the title property works fine too.</p> <p>Is this a bug or is there a workaround?</p> <p>I need the type because I would like to use reflection on it.</p> <p><em>Edit:</em></p> <p>Exception information:</p> <pre><code>Message is always. [Line: 0 Position: 0] ExceptionType: Unhandled Exception ExceptionObject: XamlParseException </code></pre> <p><strong>Stacktrace</strong>:</p> <pre><code> at MS.Internal.XcpImports.CheckHResult(UInt32 hr) at MS.Internal.XcpImports.ConvertStringToTypedCValue(IntPtr pContext, UInt32 cClrTypeName, String clrTypeName, UInt32 cValue, String value, CValue&amp; outVal, Int32&amp; typeIndex) at MS.Internal.SilverlightTypeConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value) at MS.Internal.XcpImports.GetManagedPropertyValueFromStyle(Boolean useBuiltInStyle, IManagedPeerBase obj, DependencyProperty property, Object&amp; value) at System.Windows.FrameworkElement.GetValueFromStyle(DependencyProperty property, Object&amp; value) at System.Windows.DependencyObject.EvaluateBaseValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry&amp; newEntry, ValueOperation operation) at System.Windows.DependencyObject.EvaluateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry newEntry, ValueOperation operation) at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry&amp; newEntry, ValueOperation operation) at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty property) at MS.Internal.FrameworkCallbacks.InvalidateProperty(IntPtr nativeTarget, UInt32 propertyId) </code></pre> <p>InnerException is null.</p>
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    1. USPatrick D'Souza
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    1. COWhat is the `InnerException` of the exception? How does the stack trace look like?
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    2. COhttp://stackoverflow.com/questions/6028276/missing-style-triggers-and-xtype-why You're right. There's a similar solution.
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