SeriesPoint3DDataSourceAdapter.CalculatedFields Property

Returns a collection of calculated fields.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v23.2.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public ChartCalculatedFieldCollection CalculatedFields { get; }

VB.NET

Public ReadOnly Property CalculatedFields As ChartCalculatedFieldCollection

Property Value

Type	Description
ChartCalculatedFieldCollection	A collection that stores calculated fields.

Remarks

Calculated fields allow you to evaluate values based on an expression and use them as a data source for series arguments,values, tooltips, crosshair labels, and so on.

To add a calculated field to a Chart3D Control, add a ChartCalculatedField object to the adapter’s CalculatedFields collection and specify its parameters.

Example

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: [X] * [Y].

XAML

<dxc:Chart3DControl AspectRatio="1 1 0.5">
    <dxc:Chart3DControl.DataContext>
        <local:ChartViewModel/>
    </dxc:Chart3DControl.DataContext>
    <dxc:Series3DStorage>
        <dxc:Series3D DisplayName="Series" 
                      CrosshairLabelPattern="X: {X:f1}&#x0a;Y: {Y:f1}&#x0a;Value: {V}">
            <dxc:Series3D.View>
                <dxc:Point3DSeriesView/>
            </dxc:Series3D.View>
            <dxc:SeriesPoint3DDataSourceAdapter DataSource="{Binding DataPoints}" 
                                                XArgumentDataMember="X" 
                                                YArgumentDataMember="Y" 
                                                ValueDataMember="Value">
                <dxc:SeriesPoint3DDataSourceAdapter.CalculatedFields>
                    <dxc:ChartCalculatedField Expression="[X]*[Y]" 
                                              FieldName="Value" 
                                              FieldType="Double"/>
                </dxc:SeriesPoint3DDataSourceAdapter.CalculatedFields>
            </dxc:SeriesPoint3DDataSourceAdapter>
        </dxc:Series3D>
    </dxc:Series3DStorage>
</dxc:Chart3DControl>

C#

using System.Collections.Generic;
using System.Windows;
namespace Chart3DCalculatedFields {
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
        }
    }
    public class ChartViewModel {
        List<DataPoint> dataPoints;
        public List<DataPoint> DataPoints {
            get {
                if (dataPoints == null) {
                    dataPoints = new List<DataPoint> {
                            new DataPoint (12, 10),
                            new DataPoint (11.2, 11.46),
                            new DataPoint (13.1, 11.90),
                            new DataPoint (10.74, 12.1),
                            new DataPoint (9.6, 12.236),
                            new DataPoint (10.2, 12.325),
                            new DataPoint (13.9, 12.625),
                            new DataPoint (11.4, 13.896),
                            new DataPoint (13.7, 14.123),
                            new DataPoint (15.4, 14.623),
                            new DataPoint (13.9, 15.007),
                            new DataPoint (13, 15.452),
                            new DataPoint (12.56, 15.756)
                };
                }
                return dataPoints;
            }
        }
    }
    public class DataPoint {
        public double X { get; set; }
        public double Y { get; set; }
        public DataPoint(double x, double y) {
            this.X = x;
            this.Y = y;
        }
    }
}

VB.NET

Imports System.Collections.Generic
Imports System.Windows
Namespace Chart3DCalculatedFields
    Public Partial Class MainWindow
        Inherits Window
        Public Sub New()
            InitializeComponent()
        End Sub
    End Class
    Public Class ChartViewModel
        Private f_DataPoints As List(Of DataPoint)
        Public ReadOnly Property DataPoints As List(Of DataPoint)
            Get
                If f_DataPoints Is Nothing Then
                    f_DataPoints = New List(Of DataPoint) From {
                        New DataPoint(12, 10),
                        New DataPoint(11.2, 11.46),
                        New DataPoint(13.1, 11.90),
                        New DataPoint(10.74, 12.1),
                        New DataPoint(9.6, 12.236),
                        New DataPoint(10.2, 12.325),
                        New DataPoint(13.9, 12.625),
                        New DataPoint(11.4, 13.896),
                        New DataPoint(13.7, 14.123),
                        New DataPoint(15.4, 14.623),
                        New DataPoint(13.9, 15.007),
                        New DataPoint(13, 15.452),
                        New DataPoint(12.56, 15.756)
                    }
                End If
                Return f_DataPoints
            End Get
        End Property
    End Class
    Public Class DataPoint
        Public Property X As Double
        Public Property Y As Double
        Public Sub New(ByVal x As Double, ByVal y As Double)
            Me.X = x
            Me.Y = y
        End Sub
    End Class
End Namespace