Multiple C1Charts do not load, MVVM, TabControl, DataTemplate

Multiple C1Charts do not load, MVVM, TabControl, DataTemplate

Posted by: wkelly1 on 8 August 2018, 11:10 pm EST

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  wkelly1

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  Posted 8 August 2018, 11:10 pm EST

  In my real project, I have C1Charts that are not loading properly. I was able to recreate the issue with a simple demo. The demo is attached. The demo has these important elements:

  • “MVVM”

  • “DataTemplates”

  • “TabControl with C1Charts on different tabs”

  To see the problem:

  • “Run the demo”

  • “Click on the Chart 1 tab, see the chart”

  • “Click on the Chart 2 tab, notice that the chart does not change, though the TextBlock text does change”

  • “Close the demo”

  • “Restart the demo”

  • “Click on the Chart 2 tab, see the chart”

  • “Click on the Chart 1 tab, notice that the chart does not change, though the TextBlock text does change”

  To me, it seems important the TextBlock is updating properly, while the chart is not.

  Am I doing something wrong? Or is there a work around?

  Demo.zip

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  basant.khatiyan

  

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  Posted 9 August 2018, 5:45 am EST

  Hello,

  It seems that on changing the tabs the DataContext changes are not being notified for the SeriesItemsSource. As a workaround, you can explicitly set the NotifyOnTargetUpdated to True for the ChartData DataContext as shown below:

  <c1:ChartData DataContext="{Binding NotifyOnTargetUpdated=True}" SeriesItemsSource="{Binding Curves}">
  

  Hope it helps.

  Regards,

  Basant

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  wkelly1

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  Posted 9 August 2018, 4:20 pm EST

  Well done. That fixed both the demo and my real app. Thank you!