Fast Step Line Chart in WinUI (SfCartesianChart)

14 Jun 20243 minutes to read

A fast stepline bitmap series is a special kind of series that can render a collection with huge number of data points using WriteableBitmap. FastStepLineBitmapSeries is the high performance version of step line series.

XAML

<chart:SfCartesianChart>

    <chart:SfCartesianChart.XAxes>
        <chart:DateTimeAxis />
    </chart:SfCartesianChart.XAxes>

    <chart:SfCartesianChart.YAxes>
        <chart:NumericalAxis />
    </chart:SfCartesianChart.YAxes>  

    <chart:SfCartesianChart.Series>
        <chart:FastStepLineBitmapSeries ItemsSource="{Binding Data}" 
                                        XBindingPath="XValue" 
                                        YBindingPath="YValue" />
    </chart:SfCartesianChart.Series>
</chart:SfCartesianChart>

C#

SfCartesianChart chart = new SfCartesianChart();
DateTimeAxis xAxis = new DateTimeAxis();
chart.XAxes.Add(xAxis);
NumericalAxis yAxis = new NumericalAxis();
chart.YAxes.Add(yAxis);

FastStepLineBitmapSeries series = new FastStepLineBitmapSeries()
{
    ItemsSource = new ViewModel().Data,
    XBindingPath = "XValue",
    YBindingPath = "YValue"
};

chart.Series.Add(series);

Anti-aliasing

The anti aliasing mode can be enabled using the EnableAntiAliasing property of FastStepLineBitmapSeries as shown in the following code sample.

XAML

<chart:SfCartesianChart>

    <chart:SfCartesianChart.XAxes>
        <chart:DateTimeAxis />
    </chart:SfCartesianChart.XAxes>

    <chart:SfCartesianChart.YAxes>
        <chart:NumericalAxis />
    </chart:SfCartesianChart.YAxes>  

    <chart:SfCartesianChart.Series>
        <chart:FastStepLineBitmapSeries EnableAntiAliasing="True" 
                                        ItemsSource="{Binding Data}" 
                                        XBindingPath="XValue" 
                                        YBindingPath="YValue" />
    </chart:SfCartesianChart.Series>
</chart:SfCartesianChart>

C#

SfCartesianChart chart = new SfCartesianChart();
DateTimeAxis xAxis = new DateTimeAxis();
chart.XAxes.Add(xAxis);
NumericalAxis yAxis = new NumericalAxis();
chart.YAxes.Add(yAxis);
. . .
FastStepLineBitmapSeries series = new FastStepLineBitmapSeries()
{
    ItemsSource = new ViewModel().Data,
    XBindingPath = "XValue",
    YBindingPath = "YValue",
    EnableAntiAliasing = true
};

chart.Series.Add(series);