Setting X Axis to DateTime in Candlestick chart causes exception

[Pete Davis]

I have a simple candlestick chart:

<telerik:RadChart Name="radChart1" ItemsSource="{Binding ChartData}" Visibility="{Binding CandlestickVisibility}">
    <telerik:ChartDefaultView>
        <telerik:ChartDefaultView.ChartLegend>
            <telerik:ChartLegend IsEnabled="True" Visibility="Collapsed" />
        </telerik:ChartDefaultView.ChartLegend>
    </telerik:ChartDefaultView>
    <telerik:RadChart.SeriesMappings>
            <telerik:SeriesMapping>
            <telerik:SeriesMapping.SeriesDefinition>
                <telerik:CandleStickSeriesDefinition />
            </telerik:SeriesMapping.SeriesDefinition>
            <telerik:SeriesMapping.ItemMappings>
                <telerik:ItemMapping DataPointMember="Open"
                                    FieldName="OpenPrice" />
                <telerik:ItemMapping DataPointMember="High"
                                    FieldName="HighPrice" />
                <telerik:ItemMapping DataPointMember="Low"
                                    FieldName="LowPrice" />
                <telerik:ItemMapping DataPointMember="Close"
                                    FieldName="ClosePrice" />
            </telerik:SeriesMapping.ItemMappings>
        </telerik:SeriesMapping>
    </telerik:RadChart.SeriesMappings>
</telerik:RadChart>

When I go into the designer and click the IsDateTime for the X Axis, I get a Microsoft .NET Framework exception: "Specified cast is not valid"

with this callstack

System.Windows.Markup.XamlParseException: Specified cast is not valid. ---> System.InvalidCastException: Specified cast is not valid.
   at MS.Internal.Designer.PropertyEditing.Resources.ResourceUtilities.GetDouble(FrameworkElement element, String key, Double fallbackValue)
   at MS.Internal.Designer.PropertyEditing.Resources.ResourceUtilities.GetDesiredTypeIconSize(FrameworkElement queryRoot)
   at MS.Internal.Designer.PropertyEditing.Editors.SubPropertyEditor.RefreshQuickTypes()
   at MS.Internal.Designer.PropertyEditing.Editors.SubPropertyEditor.RefreshVisuals()
   at MS.Internal.Designer.PropertyEditing.Editors.SubPropertyEditor.OnPropertyEntryChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at MS.Internal.Designer.PropertyEditing.Editors.SubPropertyEditor.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.StyleHelper.ApplyTemplatedParentValue(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, DependencyProperty dp, FrameworkElementFactory templateRoot)
   at System.Windows.StyleHelper.InvalidatePropertiesOnTemplateNode(DependencyObject container, FrameworkObject child, Int32 childIndex, FrugalStructList`1& childRecordFromChildIndex, Boolean isDetach, FrameworkElementFactory templateRoot)
   at System.Windows.FrameworkTemplate.InvalidatePropertiesOnTemplate(DependencyObject container, Object currentObject)
   at System.Windows.FrameworkTemplate.HandleBeforeProperties(Object createdObject, DependencyObject& rootObject, DependencyObject container, FrameworkElement feContainer, INameScope nameScope)
   at System.Windows.FrameworkTemplate.<>c__DisplayClass6.<LoadOptimizedTemplateContent>b__3(Object sender, XamlObjectEventArgs args)
   at System.Xaml.XamlObjectWriter.OnBeforeProperties(Object value)
   at System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart(ObjectWriterContext ctx)
   at System.Xaml.XamlObjectWriter.WriteStartMember(XamlMember property)
   at System.Xaml.XamlWriter.WriteNode(XamlReader reader)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)
   --- End of inner exception stack trace ---
   at System.Windows.Markup.XamlReader.RewrapException(Exception e, Uri baseUri)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlReader templateReader, XamlObjectWriter currentWriter)
   at System.Windows.FrameworkTemplate.LoadTemplateXaml(XamlObjectWriter objectWriter)
   at System.Windows.FrameworkTemplate.LoadOptimizedTemplateContent(DependencyObject container, IComponentConnector componentConnector, IStyleConnector styleConnector, List`1 affectedChildren, UncommonField`1 templatedNonFeChildrenField)
   at System.Windows.FrameworkTemplate.LoadContent(DependencyObject container, List`1 affectedChildren)
   at System.Windows.StyleHelper.ApplyTemplateContent(UncommonField`1 dataField, DependencyObject container, FrameworkElementFactory templateRoot, Int32 lastChildIndex, HybridDictionary childIndexFromChildID, FrameworkTemplate frameworkTemplate)
   at System.Windows.FrameworkTemplate.ApplyTemplateContent(UncommonField`1 templateDataField, FrameworkElement container)
   at System.Windows.FrameworkElement.ApplyTemplate()
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.Controls.StackPanel.MeasureOverride(Size constraint)
   at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
   at System.Windows.UIElement.Measure(Size availableSize)
   at System.Windows.ContextLayoutManager.UpdateLayout()
   at System.Windows.UIElement.UpdateLayout()
   at System.Windows.Interop.HwndSource.SetLayoutSize()
   at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
   at System.Windows.Interop.HwndSource.set_RootVisual(Visual value)
   at System.Windows.Forms.Integration.ElementHost.OnHandleCreated(EventArgs e)
   at System.Windows.Forms.Control.WmCreate(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Integration.ElementHost.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

How do I make the X Axis a datetime without blowing out the designer?

[Pete Davis]

After playing with this some more, it appears that making any changes to X-Axis properties in the designer cause the cast exception. Guess I'll have to hand-code it.

[Nikolay]

Hello Pete Davis,

We have been able to reproduce the problematic behavior and this issue has been logged for our developers to investigate further and provide a fix for one of the upcoming versions of the control.

Please, excuse us for the inconvenience caused.

Kind regards,
Nikolay
the Telerik team