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Exception on FontWeight in row style

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TreeListView

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Jerome asked on 11 Mar 2013, 05:02 PM

I have the following style applied to my TreeListView component, using the static resources below:

<sw:FontWeight x:Key="NormalWeight">Normal</sw:FontWeight>

<sw:FontWeight x:Key="BoldWeight">Bold</sw:FontWeight>

<sw:FontStyle x:Key="NormalStyle">Normal</sw:FontStyle>

<Style x:Key="TemplateRow" TargetType="telerik:TreeListViewRow">

<Setter Property="FontSize" Value="10"/>

<Setter Property="FontStyle"

Value="{Binding Path=MyProperty1,

Converter={StaticResource BooleanToFontEmphasisConverter},

FallbackValue={StaticResource NormalStyle},

TargetNullValue={StaticResource NormalStyle}}" />

<Setter Property="FontWeight"

Value="{Binding Path=MyProperty2,

Converter={StaticResource BooleanToFontWeightConverter},

FallbackValue={StaticResource NormalWeight},

TargetNullValue={StaticResource NormalWeight}}" />

<Setter Property="IsExpanded" Value="{Binding Expanded, Mode=TwoWay}" />

<Setter Property="IsSelected" Value="{Binding Selected, Mode=TwoWay}" />

</Style>

The FontStyle style is applied as expected to each row, but the FontWeight causes an exception whenever either MyProperty2 changes, or when a node is folded closed. The exception is a TargetInvocationException raised from an ArgumentOutOfRange exception

at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)

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.Delegate.DynamicInvoke(Object[] args)

at TemplatesListTreexaml.BindingOperation(Object BindingState, Int32 , Action )

The inner exception says that parameter "weight" is out of range

à System.Windows.FontWeights.EnsureFontWeight(FontWeightType weight)

at MS.Internal.XcpImports.TryConvertPseudoEnum(RuntimeTypeHandle typeHandle, Int32 value, Object& result)

at MS.Internal.XcpImports.ConvertCValueForManagedWithType(Type propertyType, CValue& outVal, Int32 outDOType, Boolean releaseObjectReference, Boolean deleteBuffer, IManagedPeerBase fromObject)

at MS.Internal.XcpImports.GetValue(IManagedPeerBase managedPeer, DependencyProperty property)

at System.Windows.DependencyObject.GetOldValue(DependencyProperty property, EffectiveValueEntry& oldEntry)

at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)

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

at System.Windows.Data.BindingExpression.SendDataToTarget()

at System.Windows.Data.BindingExpression.SourceAcquired()

at System.Windows.Data.Debugging.BindingBreakPoint.<>c__DisplayClass4.<BreakOnSharedType>b__3()

In addition, when I substitute MyProperty2 with MyProperty1 in the FontWeight style, the error still occurs.
Debugger breakpoint in the converter, however, shows tht it returns either FontWeights.Bold or FontWeights.Normal.

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