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V24.1

ProcessEmptyPointsMode Enum

Lists values that specify how the chart control handles empty points.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v24.1.dll

NuGet Package: DevExpress.Charts

Declaration

[ResourceFinder(typeof(XtraChartsResFinder), "PropertyNamesRes")]
[TypeConverter(typeof(EnumTypeConverter))]
public enum ProcessEmptyPointsMode

Members

Name Description Image
InsertZero

The chart control initializes empty points with zero values.

ProcessEmptyPointsMode.InsertZero

Interpolate

The chart control initializes empty points with mock values calculated based on neighboring points.

ProcessEmptyPointsMode.Interpolate

Ignore

Empty points are skipped.

ProcessEmptyPointsMode.Ignore

Related API Members

The following properties accept/return ProcessEmptyPointsMode values:

Library Related API Members
Cross-Platform Class Library EmptyPointOptions.ProcessPoints
WinForms Controls EmptyPointOptionsModel.ProcessPoints

Example

How to: Display Chart Empty Points

This example shows how to customize display options for empty points of a bar series view.

This chart displays series with empty points.

Cast the XYDiagramSeriesViewBase.EmptyPointOptions property to the EmptyPointOptions type to access a series’ empty point settings.

Specify the ProcessPoints property to define how the chart handles empty points. In this example, the chart calculates mock values for empty points.

using DevExpress.XtraCharts;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;

namespace EmptyPointRepsentation {
    public partial class Form1 : Form {
        ChartControl chart { get { return chartControl1; } }
        public Form1() {
            InitializeComponent();

            chart.DataSource = WeatherDataProvider.Data;
            Series series = new Series("Wind", ViewType.Bar);
            series.SetDataMembers("Date", "Wind");
            chart.Series.Add(series);

            BarSeriesView view = (BarSeriesView)series.View;

            EmptyPointOptions emptyPointOptions = view.EmptyPointOptions;
            emptyPointOptions.ProcessPoints = ProcessEmptyPointsMode.Interpolate;
            emptyPointOptions.Color = Color.FromArgb(100, Color.DarkGray); 

        }
    }

    public static class WeatherDataProvider {
        static List<WeatherPoint> data;

        public static List<WeatherPoint> Data {
            get {
                if (data == null)
                    InitCollection();
                return data;
            }
        }
        static void InitCollection() {
            data = new List<WeatherPoint>();
            int lastYear = DateTime.Now.Year - 1;
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 10) });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 11), Wind = 5 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 12), Wind = 5 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 13), Wind = 6 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 14), Wind = 3 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 15) });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 16), Wind = 6 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 17), Wind = 5 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 18), Wind = 5 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 19), Wind = 4 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 20), Wind = 3 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 21), Wind = 7 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 22), Wind = 2 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 23) });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 24) });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 25), Wind = 4 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 26), Wind = 5 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 27), Wind = 4 });
            data.Add(new WeatherPoint() { Date = new DateTime(lastYear, 7, 28), Wind = 4 });
        }

        public class WeatherPoint {
            public DateTime Date { get; set; }
            public double? Wind { get; set; }
        }
    }
}
See Also