[Solved] Size of LineSeries collection

[Steven]

Is there some kind of limit on how many points can be in a LineSeries?

I have two lineseries on my chart and I am noticing that at some threshold one of the lines will stop half way across the chart. After fiddling around, I tried reducing the number of points by removing every 2nd and 3rd point and found that the line would then be drawn all the way.

What is the limit? Is it adjustable?

[Steven]

Sorry, my mistake. The LineSeries is fine. The second line is actually a SplineSeries, and that is the one that is truncated.

[Ves]

Hi Steven,

The only limit comes from the xaml itself -- plotting hundreds of thousands of points would lead to performance issues. However, missing part of the line is not something expected and we are not currently aware of such an issue. I have attached a screenshot of a chart with spline series with 10000 points. It is just a simple example based on the following code:

<telerikChart:RadCartesianChart x:Name="chart">
    <telerikChart:RadCartesianChart.HorizontalAxis>
        <telerikChart:DateTimeContinuousAxis MajorStepUnit="Day" MajorStep="2"  />
    </telerikChart:RadCartesianChart.HorizontalAxis>
    <telerikChart:RadCartesianChart.VerticalAxis>
        <telerikChart:LinearAxis></telerikChart:LinearAxis>
    </telerikChart:RadCartesianChart.VerticalAxis>
    <telerikChart:SplineSeries>
        <telerikChart:SplineSeries.ValueBinding>
            <telerikChart:PropertyNameDataPointBinding PropertyName="Value"/>
        </telerikChart:SplineSeries.ValueBinding>
        <telerikChart:SplineSeries.CategoryBinding>
            <telerikChart:PropertyNameDataPointBinding PropertyName="Date"/>
        </telerikChart:SplineSeries.CategoryBinding>
    </telerikChart:SplineSeries>
</telerikChart:RadCartesianChart>

 
and

List<DataItem> source = new List<DataItem>();
Random r = new Random();

for (int i = 0; i < 10000; i++)
{
    source.Add(new DataItem(DateTime.Now.AddMinutes(i), r.Next(100)));
}
this.chart.Series[0].ItemsSource = source;

where the DataItem class looks like this:

public class DataItem
{
    public DataItem(DateTime date, double value)
    {
        this.Date = date;
        this.Value = value;
    }
    public DateTime Date { get; set; }
    public double Value { get; set; }
}

Can you confirm if it works correctly for you? If so, can you please, modify it or provide another example, which reproduces the problem, so that we can investigate it and get back to you?

Best regards,
Ves
Telerik