ChartMarker class

Represents a chart data marker.

public class ChartMarker


Name Description
Format { get; } Provides access to fill and line formatting of this marker.
Size { get; set; } Gets or sets chart marker size. Default value is 7.
Symbol { get; set; } Gets or sets chart marker symbol.


Shows how to work with data points on a line chart.

public void ChartDataPoint()
    Document doc = new Document();
    DocumentBuilder builder = new DocumentBuilder(doc);

    Shape shape = builder.InsertChart(ChartType.Line, 500, 350);
    Chart chart = shape.Chart;

    Assert.AreEqual(3, chart.Series.Count);
    Assert.AreEqual("Series 1", chart.Series[0].Name);
    Assert.AreEqual("Series 2", chart.Series[1].Name);
    Assert.AreEqual("Series 3", chart.Series[2].Name);

    // Emphasize the chart's data points by making them appear as diamond shapes.
    foreach (ChartSeries series in chart.Series) 
        ApplyDataPoints(series, 4, MarkerSymbol.Diamond, 15);

    // Smooth out the line that represents the first data series.
    chart.Series[0].Smooth = true;

    // Verify that data points for the first series will not invert their colors if the value is negative.
    using (IEnumerator<ChartDataPoint> enumerator = chart.Series[0].DataPoints.GetEnumerator())
        while (enumerator.MoveNext())

    // For a cleaner looking graph, we can clear format individually.

    // We can also strip an entire series of data points at once.

    doc.Save(ArtifactsDir + "Charts.ChartDataPoint.docx");

/// <summary>
/// Applies a number of data points to a series.
/// </summary>
private static void ApplyDataPoints(ChartSeries series, int dataPointsCount, MarkerSymbol markerSymbol, int dataPointSize)
    for (int i = 0; i < dataPointsCount; i++)
        ChartDataPoint point = series.DataPoints[i];
        point.Marker.Symbol = markerSymbol;
        point.Marker.Size = dataPointSize;

        Assert.AreEqual(i, point.Index);

See Also