How to handle empty point gaps in WinForms Chart?

Plotting data in the WinForms Chart automatically ignores empty points and adds empty segments or gaps. This section explains how to avoid creating an empty segment by using built-in APIs.

For the provided NaN values, gaps will be created. By setting the AllowGapForEmptyPoints property of the Chart control to false, you can prevent the creation of empty segments, and the chart plotting will appear as shown below.

For more details on handling empty points, refer to the WinForms Chart documentation.

Private void InitializeComponent()
{
    // Create and configure chart
    this.chartControl = new ChartControl();
    . . .

    // Treat empty points as continuous (no gap)
    chartControl.AllowGapForEmptyPoints = false;

    // Series with NaN to represent missing points
    chartSeries = new ChartSeries();
    chartSeries.Type = ChartSeriesType.Line;
    chartSeries.Points.Add(new ChartPoint(2001, 12));
    chartSeries.Points.Add(new ChartPoint(2002, 14));
    chartSeries.Points.Add(new ChartPoint(2003, double.NaN)); // empty
    chartSeries.Points.Add(new ChartPoint(2004, 24));
    chartSeries.Points.Add(new ChartPoint(2005, 40));
    chartSeries.Points.Add(new ChartPoint(2006, double.NaN)); // empty
    chartSeries.Points.Add(new ChartPoint(2007, 20));
    chartSeries.Points.Add(new ChartPoint(2008, 30));
    this.chartControl.Series.Add(chartSeries);

    // Add chart to form
    this.Controls.Add(this.chartControl);
}

Private Sub InitializeComponent()
    ' Create and configure chart
    Me.chartControl = New ChartControl()
    . . .

    ' Hide gap for empty points
    Me.chartControl.AllowGapForEmptyPoints = False

    ' Create line series with some missing points (Double.NaN)
    Me.chartSeries = New ChartSeries()
    Me.chartSeries.Type = ChartSeriesType.Line
    Me.chartSeries.Points.Add(New ChartPoint(2001, 12))
    Me.chartSeries.Points.Add(New ChartPoint(2002, 14))
    Me.chartSeries.Points.Add(New ChartPoint(2003, Double.NaN)) ' empty point
    Me.chartSeries.Points.Add(New ChartPoint(2004, 24))
    Me.chartSeries.Points.Add(New ChartPoint(2005, 40))
    Me.chartSeries.Points.Add(New ChartPoint(2006, Double.NaN)) ' empty point
    Me.chartSeries.Points.Add(New ChartPoint(2007, 20))
    Me.chartSeries.Points.Add(New ChartPoint(2008, 30))

    ' Add series to chart
    Me.chartControl.Series.Add(Me.chartSeries)
    Me.Controls.Add(Me.chartControl)

End Sub

Output