Last Updated: 06 May 2021 12:57 by ADMIN
When the tooltip is displayed at a certain data point and the data is updated from code-behind, the tooltip stays with wrong data. The expected behavior is the tooltip to be hidden in such case.
Last Updated: 07 Apr 2021 06:37 by Stefan
Applying ChartTrackBallBehavior to a CartesianChart with ScatterLine/ScatterPoint series does not take any effect.
Last Updated: 24 Feb 2021 13:04 by ADMIN
Release R1 2021 SP1
Last Updated: 24 Feb 2021 13:03 by ADMIN
Release R1 2021 SP1

An exception is thrown on Android when this code is executed

            this.chart1.VerticalAxis = new NumericalAxis { Minimum = 300, Maximum = 400 };
            this.chart1.VerticalAxis = new NumericalAxis { Minimum = 100, Maximum = 200 };

Last Updated: 19 Feb 2021 18:04 by RAMAKANT
Created by: RAMAKANT
Comments: 6
Category: Chart
Type: Bug Report

Hi Team,

If you set the PanOffset in XAML, it is not applied. 

Does not work:

<telerikChart:RadCartesianChart x:Name="MyChart"  Zoom="2, 1"  PanOffset="-400,0" >

I would expect that the RadChartView renderer would be responsible for handling this after the control is loaded and the series/axis is rendered (see workaround).


If I subscribe to the ChartView's NativeControlLoaded event and wait approx 100ms before calling PanOffset, it will work.


<telerikChart:RadCartesianChart x:Name="MyChart"  Zoom="2, 1" 

private async void MyChart_OnNativeControlLoaded(object sender, EventArgs e)
    await Task.Delay(100);
    MyChart.PanOffset = new Point(-400, 0);

Takeaway and Action Requested

The takeaway, and basis of this Bug Report, is that the control should internally perform this delay check and set the PanOffset.

This will enable MVVM scenarios because (I originally wanted to bind the PanOffset value from my view model).

Thank you,


Last Updated: 20 Jan 2021 11:16 by ADMIN
Release R1 2021
When RadChart is placed inside a ScrollViewer and there is tooltip displayed, scrolling the content with a slide gesture does not hide the tooltip.
Last Updated: 13 Jan 2021 15:12 by ADMIN
In the case of stacked column chart (Chart with BarSeries with Stack CombineMode), and if the data contains negative values, series labels are displayed at the correct position.
Last Updated: 07 Dec 2020 16:09 by ADMIN
Release 2020.3.1207 (R3 2020 minor release)
Last Updated: 07 Dec 2020 16:03 by ADMIN
Release 2020.3.1207 (R3 2020 minor release)
When you update the data in the chart so that the vertical axis values are changed - the annotation does not properly update and stays at the same location.

Last Updated: 06 Nov 2020 14:51 by ADMIN
Release 2020.3.1106 (R3 2020 minor release)
On the Chart control, the labels of the Legend are in a different font than everywhere else on iOS.
Last Updated: 13 May 2020 13:02 by ADMIN
Release R2 2020
Last Updated: 13 May 2020 12:54 by ADMIN
Release R2 2020
Last Updated: 13 May 2020 12:53 by ADMIN
Release R2 2020

When you have a Chart instance with fixed size and it's larger than the screen size, the Chart is not rendered and the following error is displayed in the VS output:

"RadExtendedCartesianChartView not displayed because it is too large to fit into a software layer (or drawing cache)"

Last Updated: 04 May 2020 10:38 by ADMIN
When the chart is zoomed/panned and the data is refreshed asynchronously, the app locks up and eventually crashes on iOS with  NSInvalidArgumentException.
Last Updated: 01 Apr 2020 11:33 by ADMIN
when applying custom label formatter to wrap the categorical axis label text, the text is not wrapped. It works fine on iOS and UWP.
Last Updated: 01 Apr 2020 08:47 by ADMIN

If you have the following PieChart with donut series definition:

<telerikChart:RadPieChart HeightRequest="200" 
        <telerikChart:DonutSeries ShowLabels="True"
                                  ItemsSource="{Binding Data}" />
        <telerikChart:DonutSeries ShowLabels="True"
                                  ItemsSource="{Binding Data1}" />

On android works as expected:

On iOS the series are overlapped and not visualized as expected. The radius factor is not respected

On UWP the second donut series in not visualized and the radius factor is not respected.

Last Updated: 20 Mar 2020 13:18 by ADMIN
Release 2020.1.313 (R1 2020 minor release)
After setting the MajorLinesVisibility property to GridLineVisibility.Xy only the Y lines are showing up.
Last Updated: 20 Feb 2020 13:59 by ADMIN
If the series is added after the page constructor, the vertical axis labels are not shown.

As a workaround, create the series in the constructor and set its ItemsSource at a later stage.
Last Updated: 20 Feb 2020 13:21 by ADMIN
The Chart loses all the UI customizations made in the iOS platform renderer when the Series are updated, for example, if you show/hide certain Series or updated their ItemsSource.
Last Updated: 12 Nov 2019 12:55 by ADMIN

As of the latest release (10/04/2019) RadPieChart with a PieSeries having LabelBinding set to a property name, and ShowLabels set to True, with the list of data bound to ItemsSource containing one or more empty pie slices (a null in the list), causes a System.Reflection.TargetException to be thrown on load of the page containing the chart in iOS (this scenario works fine in UWP).

I am using the latest available Visual Studio 2019 (16.3.5) and the latest available Xamarin.Forms package ( and testing on an iPad with iOS 13.1.  The reason I need to have a null value in the list is so that the custom color palette I'm applying will always apply the same colors to the same data points (pie slices), even though in some cases, zero or one or two of the three pie slices will have no data value (and so should not appear in the chart, but still "use up" the corresponding color in the 3 colors of the palette).

In the 08/02/2019 release, this scenario worked fine in iOS (the 09/13/2019 release had the https://feedback.telerik.com/xamarin/1431067-chart-ios-invalidcastexception-is-thrown-when-the-chart-is-loaded issue, which is now resolved in the 10/04/2019 release, but which prevented my testing in iOS since in my app I had RadCartesianCharts on the same pages as the RadPieCharts).

The newly broken functionality in iOS could possibly be related to two other items that are marked completed:
https://feedback.telerik.com/xamarin/1366403-piechart-tooltip-behavior-is-not-working-properly (in 10/04/2019 release)
https://feedback.telerik.com/xamarin/1365842-chart-null-value-support (in R3 2018 SP release)

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