Unable to cast object of type 'System.Decimal' to type Object

[Anitha]

Hi All,

    I am trying to bind more than 4 series to the rad chart. Four series are binding perfectly, but when I am trying to bind 5th series, I am getting the below error,:

Unable to cast object of type 'System.Decimal' to type Object

   at Telerik.Windows.Data.FuncExtensions.<>c__DisplayClass1`2.<ToUntypedFunc>b__0(Object item)
   at Telerik.Windows.Controls.Charting.DataBindingHelper.ExtractDataPoint(QueryableCollectionViewGroup queryableCollectionViewGroup, AggregateFunction aggregateFunction, Func`2 getter, EmptyPointBehavior emptyPointBehavior)
   at Telerik.Windows.Controls.Charting.DataBindingHelper.ProcessNoMappings(QueryableCollectionView dataEngine, List`1 numericPropertyDescriptors, ISeriesDefinition defaultSeriesDefinition, SamplingSettings samplingSettings, ZoomScrollSettings zoomScrollSettings)
   at Telerik.Windows.Controls.Charting.DataBindingHelper.GenerateDataSeries(Object originalData, SeriesMappingCollection seriesMappings, ISeriesDefinition defaultSeriesDefinition, ChartFilterDescriptorCollection globalFilterDescriptors, ChartSortDescriptorCollection globalSortDescriptors, SamplingSettings samplingSettings, ZoomScrollSettings zoomScrollSettings, AxisRangeState axisXRangeState)
   at Telerik.Windows.Controls.RadChart.GenerateDataSeries(Object originalData, SeriesMappingCollection seriesMappings, ChartArea chartArea)
   at Telerik.Windows.Controls.RadChart.GenerateDataSeries(Object originalData)
   at Telerik.Windows.Controls.RadChart.Rebind(Object originalData)
   at Telerik.Windows.Controls.RadChart.Rebind()
   at Telerik.Windows.Controls.RadChart.SeriesMappingsCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at System.Windows.DependencyObjectCollection`1.TryCollectionChanged(NotifyCollectionChangedEventArgs e)
   at System.Windows.DependencyObjectCollection`1.RaiseReset()
   at System.Windows.DependencyObjectCollection`1.Clear()
   at SODANORTEL.MainPage.LoadGraphDown(Object s, EventArgs e)
   at SODANORTEL.MainPage.lst_Measures_Downward_SelectionChanged(Object sender, SelectionChangedEventArgs e)
   at System.Windows.Controls.Primitives.Selector.OnSelectionChanged(SelectionChangedEventArgs e)
   at System.Windows.Controls.Primitives.Selector.InvokeSelectionChanged(List`1 unselectedItems, List`1 selectedItems)
   at System.Windows.Controls.Primitives.Selector.SelectionChanger.End()
   at System.Windows.Controls.Primitives.Selector.NotifyListItemSelected(ListBoxItem listBoxItem, Boolean isSelected)
   at System.Windows.Controls.Primitives.Selector.OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object oldValue, Object newValue)
   at System.Windows.DependencyObject.UpdateEffectiveValue(DependencyProperty property, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, ValueOperation operation)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet, Boolean isBindingInStyleSetter)
   at System.Windows.DependencyObject.SetValue(DependencyProperty property, Boolean b)
   at System.Windows.Controls.ListBox.MakeToggleSelection(Int32 index)
   at System.Windows.Controls.ListBox.HandleItemSelection(ListBoxItem item, Boolean isMouseSelection)
   at System.Windows.Controls.ListBox.OnListBoxItemClicked(ListBoxItem item)
   at System.Windows.Controls.ListBoxItem.OnMouseLeftButtonDown(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonDown(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)

Any idea why I am not able to bind more than 4 series to a line chart.

Thanks in Advance

[Petar Marchev]

Hello Anitha,

I created a simple app that has a chart with six line series and it works correctly. I have attached it to this response so that you can test it and let us know if you get an incorrect behavior.

I suspect that the fifth series you add has some inconsistency in the series mapping, so I suggest you check on that first. If you keep experiencing problems I will have to ask that you prepare a simple app that reproduces this exception and send the code to us so that we can test it and investigate.   

Regards,
Petar Marchev
the Telerik team