Issue in the WPF designer if using generic.shared.xaml

1235

Roberto posted over 12 years ago

Hello,
I am experiencing an issue related to the generic.shared.xaml file.

If I use this file I am not able to use the designer view of a WPF usercontrol since I get the following error.

I use a dirty trick when I need to change the layout, I comment the line referring to that file:

   <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/Assets/ApplicationStyles.xaml"/>
                <!--<ResourceDictionary Source="/Assets/generic.shared.xaml"/>-->
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>

and then I am able to correctly see the page again.

Now the app works as expected so this is only a designer issue,

but I want you to signal in case you're able to fix it

This is the error I get.

Best Regards

Roberto Dalmonte

System.Reflection.TargetInvocationException

Exception has been thrown by the target of an invocation.

at System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Delegate.DynamicInvokeImpl(Object[] args)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)

at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

System.ArgumentException

'{DependencyProperty.UnsetValue}' is not a valid value for the 'System.Windows.Controls.Control.Template' property on a Setter.

at System.Windows.Setter.Seal()

at System.Windows.SetterBaseCollection.Seal()

at System.Windows.Style.Seal()

at System.Windows.StyleHelper.UpdateStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldStyle, Style newStyle, Style& styleCache)

at System.Windows.FrameworkElement.OnStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)

at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)

at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)

at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp)

at System.Windows.FrameworkElement.UpdateStyleProperty()

at System.Windows.FrameworkElement.OnInitialized(EventArgs e)

at System.Windows.FrameworkElement.TryFireInitialized()

at System.Windows.FrameworkElement.ChangeLogicalParent(DependencyObject newParent)

at System.Windows.FrameworkElement.AddLogicalChild(Object child)

at System.Windows.Controls.UIElementCollection.AddInternal(UIElement element)

at System.Windows.Controls.UIElementCollection.Add(UIElement element)

at Infragistics.Controls.Schedules.ScheduleTimeControlBase.InitializeTemplatePanel(Canvas templatePanel)

at Infragistics.Controls.Schedules.ScheduleControlBase.OnApplyTemplate()

at Infragistics.Controls.Schedules.ScheduleTimeControlBase.OnApplyTemplate()

at Infragistics.Controls.Schedules.XamDayView.OnApplyTemplate()

at System.Windows.FrameworkElement.ApplyTemplate()

at System.Windows.FrameworkElement.MeasureCore(Size availableSize)