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V25.1
  • AreaEmptyPointOptions Class

    Contains empty point options for area series views and their descendants.

    Namespace: DevExpress.XtraCharts

    Assembly: DevExpress.XtraCharts.v25.1.dll

    NuGet Package: DevExpress.Charts

    #Declaration

    public class AreaEmptyPointOptions :
        EmptyPointOptions

    The following members return AreaEmptyPointOptions objects:

    #Remarks

    The AreaEmptyPointOptions class introduces the following options:

    • Border – Specifies border settings for empty point areas.
    • FillStyle – Specifies fill settings for empty point areas.

    Refer to the following help topic for more information: Empty Points.

    #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; }
            }
        }
    }
    

    #Inheritance

    See Also