All docs
V20.1
20.1
19.2
The page you are viewing does not exist in version 19.2. This link will take you to the root page.
19.1
The page you are viewing does not exist in version 19.1. This link will take you to the root page.
18.2
The page you are viewing does not exist in version 18.2. This link will take you to the root page.
18.1
The page you are viewing does not exist in version 18.1. This link will take you to the root page.
17.2
The page you are viewing does not exist in version 17.2. This link will take you to the root page.

ChartCalculatedFieldCollection Class

A collection that stores calculated fields.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v20.1.dll

Declaration

public class ChartCalculatedFieldCollection :
    ChartElementNamedCollection,
    IEnumerable<ICalculatedField>,
    IEnumerable
Public Class ChartCalculatedFieldCollection
    Inherits ChartElementNamedCollection
    Implements IEnumerable(Of ICalculatedField),
               IEnumerable

Related API Members

The following members accept/return ChartCalculatedFieldCollection objects:

Library Related API Members
WinForms Controls ChartControl.CalculatedFields
ASP.NET Controls and MVC Extensions ChartControlSettings.CalculatedFields
WebChartControl.CalculatedFields

Remarks

The ChartCalculatedFieldCollection is a collection of the ChartCalculatedField objects.

Examples

The following example shows how to create a calculated field and then use this field as a data source for a series. The field's values are calculated by the following expression: [Time.Seconds] * [Velocity].

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

namespace CalculatedFieldExample {
    public partial class Form1 : Form {
        //...
        private void Form1_Load(object sender, EventArgs e) {
            chartControl1.DataSource = GetDataPoints();

            ChartCalculatedField calcField = new ChartCalculatedField();
            calcField.Expression = "[Time.Seconds] * [Velocity]";
            calcField.FieldType = ChartCalculatedFieldType.Double;
            calcField.Name = "Displacement";
            chartControl1.CalculatedFields.Add(calcField);

            Series series = new Series("series", ViewType.Line);
            series.ArgumentDataMember = "Time";
            series.ValueDataMembers.AddRange("Displacement");
            chartControl1.Series.Add(series);
            XYDiagram diagram = chartControl1.Diagram as XYDiagram;
            diagram.AxisX.TimeSpanScaleOptions.MeasureUnit = TimeSpanMeasureUnit.Second;
            diagram.AxisY.WholeRange.AlwaysShowZeroLevel = false;
        }
        public List<DataPoint> GetDataPoints() {
            List<DataPoint> dataPoints = new List<DataPoint>() {
                new DataPoint (new TimeSpan(0, 0, 0), 10),
                new DataPoint (new TimeSpan(0, 0, 1), 11.46),
                new DataPoint (new TimeSpan(0, 0, 2), 11.90),
                //...
                // Other data points here.
                // ...
                new DataPoint (new TimeSpan(0, 0, 12), 15.756)
            };
            return dataPoints;
        }
    }
    public class DataPoint {
        public TimeSpan Time { get; set; }
        public double Velocity { get; set; }
        public DataPoint(TimeSpan time, double velocity) {
            this.Time = time;
            this.Velocity = velocity;
        }
    }
}

Inheritance

See Also