How to display a fixed number of data points in .NET MAUI Chart (SfCartesianChart)?

The auto scrolling delta feature in .NET MAUI Cartesian Chart ensures that a specified range of data is always visible in the chart, allowing you to view remaining data points by scrolling. This feature keeps the most recently added data points at the end of the chart, resetting the scrolling to the end of the range whenever a new point is added. To implement this feature for different types of axes, you can use the code examples provided below:

Category axis
To use the category axis, the AutoScrollingDelta property of ChartAxis can be used to customize the number of visible points displayed on the chart.

[XAML]

<chart:SfCartesianChart.XAxes>
  <chart:CategoryAxis AutoScrollingDelta="3"/>
</chart:SfCartesianChart.XAxes>

[C#]

CategoryAxis primaryAxis = new CategoryAxis();
primaryAxis.AutoScrollingDelta = 3;

Numerical axis
To use the numerical axis, the AutoScrollingDelta property of ChartAxis can be used to customize the visible range displayed on the chart.

[XAML]

<chart:SfCartesianChart.XAxes>
     <chart:NumericalAxis AutoScrollingDelta="50"/>
</chart:SfCartesianChart.XAxes>

[C#]

NumericalAxis primaryAxis = new NumericalAxis();
primaryAxis.AutoScrollingDelta = 50;

Date-Time axis
To use date-time axes, the AutoScrollingDelta property of ChartAxis can be used to specify the visible range to be loaded, while the AutoScrollingDeltaType property of DateTimeAxis can be used to specify the date-time component for the AutoScrollingDelta value. These properties can be customized to meet your specific charting needs.

[XAML]

<chart:SfCartesianChart.XAxes>
    <chart:DateTimeAxis AutoScrollingDelta="3" 
                        AutoScrollingDeltaType="Months"/>
</chart:SfCartesianChart.XAxes>

[C#]

DateTimeAxis primaryAxis = new DateTimeAxis();
primaryAxis.AutoScrollingDelta = 3;
primaryAxis.AutoScrollingDeltaType = DateTimeIntervalType.Months;

Note:

AutoScrollingDeltaMode property can be used to determine whether the axis should be scrolled from start position or end position. The default value of AutoScrollingMode is End.

Conclusion
I hope you enjoyed learning about displaying a Fixed Number of Data Points in .NET MAUI Charts.

You can refer to our .NET MAUI Charts feature tour page to know about its other groundbreaking feature representations. You can also explore our .NET MAUI Charts documentation to understand how to present and manipulate data.

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