Hello Xiaolong,

You can try using the line chart sampling feature.

The following example demonstrates Sampled 2D Line: All Examples >> Chart Gallery >> Line >> Sampled 2D Line

The online example is available at: Sampled 2D Line

 

You can also take a look at the following KB topic: Enable sampling for the line series chart

Best Regards,
Nevron Support Team

Hi experts

i need to draw about one million of line segments in NChart, currently it would take ~15 seconds, so is there any method to optimize the performance? the following is the code i use,

var series = (NLineSeries)_chart.Series.Add(SeriesType.Line);
series.UseXValues = true;
series.BorderStyle.Width = new NLength(2);
series.DataLabelStyle.Visible = false;
series.InflateMargins = true;

for (int i = 0; i < lineDataSeries.XValues.Count; i++)
{
var pt = new NDataPoint(lineDataSeries.XValues[i].ToOADate(), lineDataSeries.YValues[i]);

pt[DataPointValue.StrokeStyle] = new NStrokeStyle(1.5f, lineDataSeries.Colors[i]);

series .AddDataPoint(pt);
}

thanks

xiaolong