Skip to main content
All docs
V25.1
  • AreaEmptyPointOptions.FillStyle Property

    Returns fill style settings for empty point areas.

    Namespace: DevExpress.XtraCharts

    Assembly: DevExpress.XtraCharts.v25.1.dll

    NuGet Package: DevExpress.Charts

    Declaration

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

    Property Value

    Type Description
    PolygonFillStyle

    Specifies fill style settings.

    Property Paths

    You can access this nested property as listed below:

    Object Type Path to FillStyle
    AreaSeriesViewBase
    .EmptyPointOptions .FillStyle

    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