ObservableCollection Dataseries vanishes after 200 datapoints

2 posts, 0 answers
  1. scorp
    scorp avatar
    59 posts
    Member since:
    Dec 2010

    Posted 08 Apr 2011 Link to this post

    I have a chart with an observablecollections with a custom class with 4-5 fields. Couple of fields map to the XValue and YValue and the others are to identify the datapoint. In the BuildCustomItemStyle method I use the dataseries to get all fields bound to the datapoint via
    (dataSeries[(item as BaseChartItem).CurrentIndex].DataItem
    However if I exceed 200 datapoints on the chart the information doesn't exist anymore and I am unable to access the fields. Also I tried to bind one of my fields to LegendLabel and extract it as well. Though this works for a limited number of datapoints on the chart and doesn't bind if the datapoints increase in number.
  2. Yavor
    Yavor avatar
    11 posts

    Posted 14 Apr 2011 Link to this post

    Hi scorp,

    One possible cause for this behavior may be the sampling. For more information on this feature, please refer to this article:


    You can set the SamplingThreshold to 0, to see if the data is available. If it is not, you can open a formal support ticket, and send us a small working project, for additional review and testing.

    Kind regards,
    the Telerik team
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