I have chart with StackedColumnSeries and need to update the data dynamically. (Not adding the new category).
Please see my sample code, run it and click "Start Timer". In timer event I tried to change the category data, its not changing in chart.
(Found alternate solution that adding and removing category works, but I don't want to do that.)
Hello John,
After reviewing the issue with the GroupBy object our developers stated that GroupBy was designed to be used with INotifyCollectionChanged.
To achieve the real time data update you need to provide the data in grouped format and those items to implement INotifyPropertyChanged.
I am attaching here the sample that Lazar modified for you for doing the same so other users may benefit from this as well.
You do need to implement the INotifyPropertyChanged interface for CategoryData.
However, as of now, there is an issue with the GroupBy object in StackedColumnSeries. It doesn't notify when property is changed.
I suggest you continue with the alternative solution with adding and removing category since it seems that there is no other resolution of the issue now.
I have logged this behavior with our developers in our tracking system, with an issue ID of 154964. I have also created a support ticket on your behalf with number CAS-125189-K6X0P7 in order to link the development issue to it so that you are automatically updated when a Service Release containing your fix is available for download.
Let me know if you need any additional help.
Sincerely,
Lazar Nikolov
Infragistics
www.infragistics.com/support
Hello John!
<<ObservableCollection<T> does implement INotifyPropertyChanged, however it only raises PropertyChanged events for changes in its own properties, not for the properties of the items which it contains>>Found at: http://social.msdn.microsoft.com/Forums/vstudio/en-US/180c4027-558a-452c-97a0-d21885e628d4/how-to-raise-propertychanged-event-for-item-in-observablecollection?forum=wpf
Additional Info: http://stackoverflow.com/questions/1427471/observablecollection-not-noticing-when-item-in-it-changes-even-with-inotifyprop
Hope this helps you