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You are viewing help content for pre-release software. This document and the features it describes are subject to change.

AreaEmptyPointOptions.FillStyle Property

Returns fill style settings for empty point areas.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v21.2.dll

Declaration

[XtraChartsLocalizableCategory(XtraChartsCategory.Appearance)]
[PersistenceMode(PersistenceMode.InnerProperty)]
public PolygonFillStyle FillStyle { get; }

Property Value

Type Description
PolygonFillStyle

Specifies fill style settings.

Property Paths

You can access this nested property as listed below:

Example

How to: Display Area Chart Empty Points

This example shows how to customize display options for empty points of an area series view.

This chart displays series with empty points.

Cast the AreaSeriesViewBase.EmptyPointOptions property to the AreaEmptyPointOptions type to access an area 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.Area);
            series.SetDataMembers("Date", "Wind");
            chart.Series.Add(series);

            AreaSeriesView view = (AreaSeriesView)series.View;

            view.MarkerVisibility = DevExpress.Utils.DefaultBoolean.True;
            AreaEmptyPointOptions areaEmptyPointOptions = view.EmptyPointOptions;
            areaEmptyPointOptions.ProcessPoints = ProcessEmptyPointsMode.Interpolate;
            areaEmptyPointOptions.FillStyle.FillMode = FillMode.Solid;
            areaEmptyPointOptions.Color = Color.DarkGray;
            areaEmptyPointOptions.Border.Color = Color.Gray;
            areaEmptyPointOptions.Border.Thickness = 2;

        }
    }

    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