Application is Crashing Randomly in Xamarin Forms IOS Project when we try to use ChartSelectionBehavior in DonutSeries and BarSeries

[Divya]

Hi all,

This happened randomly when we tap on a chart section to go to detail, sometimes it doesn’t fire selection event and sometime when it fires it gives null reference exception.and some times when we tap on a chart selection, application is terminating even its not giving any error in Xamarin forms IOS Project

[Yana]

Hello Diviya,

We have the following issues related to Chart SelectionBehavior:

https://feedback.telerik.com/xamarin/1381299-chart-ios-the-selectionchanged-event-of-the-chartselectionbehavior-is-fired-twice-for-a-single-selection-change
https://feedback.telerik.com/xamarin/1366345-chart-clearselection-method-of-the-chartselectionbehavior-does-nor-work-properly

Please check whether the erroneous behavior you're observing is not related to any of those.

If that's not the case, I would ask you to elaborate more on the concrete scenario you have.

Regards,
Yana
Progress Telerik

[Divya]

Hi Yana,

My Issue also same including that sometimes selection  changed is not firing(if it fires its not giving selectedpoints) and sometimes it's firing two times

[Yana]

Hello Diviya,

I suppose that these issues are related to the mentioned bug reports - if you use ClearSelection() method, it does not work properly, so the selected points of the chart would remain. In this case if the user selects another data point, SelectionChanged will be raised to un-select the previously data point and in this case SelectedPoints collection will be empty.

I've raised the priority of both issues related to selection and hopefully, we'll manage to provide a fix soon.

I am sorry for any inconvenience caused.

Regards,
Yana
Progress Telerik