ClientDataSourceProviderCustomizeSeriesEventArgs.DataSourceValue Property

Gets the value from a datasource assigned to the ChartRangeControlClientDataProvider.DataSource property of the chart range control client (numeric or date-time).

Namespace: DevExpress.XtraEditors

Assembly: DevExpress.XtraEditors.v24.2.dll

Declaration

C#

public object DataSourceValue { get; }

VB.NET

Public ReadOnly Property DataSourceValue As Object

Property Value

Type	Description
Object	An object representing the value contained in the specified datasource. Null if the value is not found in the datasource.

Remarks

Use this property to obtain the data source’s value.

Example

This example shows how to adjust series of a numeric chart range control client using the ChartRangeControlClientBase.CustomizeSeries event. This event occurs before a series of the chart range control client is drawn in the range control’s viewport.

Use the ClientDataSourceProviderCustomizeSeriesEventArgs.View property to change the series view of the chart range control client. In addition, you can access the data source value using the ClientDataSourceProviderCustomizeSeriesEventArgs.DataSourceValue property.

Form1.cs

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Windows.Forms;
using DevExpress.XtraEditors;

namespace ChartClientCustomizeSeries {
    public partial class Form1 : Form {

        const int pointCount = 20;
        const int seriesCount = 3;
        Random rand = new Random();
        List<NumericItem> data = new List<NumericItem>();

        public Form1() {
            InitializeComponent();
            SetUpNumericChartRangeControlClient();
        }

        private void numericChartRangeControlClient1_CustomizeSeries(object sender, ClientDataSourceProviderCustomizeSeriesEventArgs e) {

            // Change the default Line view of the chart client to Area. 
            AreaChartRangeControlClientView areaView = new AreaChartRangeControlClientView();
            e.View = areaView;

            // Customize the Area view properties.
            areaView.AreaOpacity = 30;
            areaView.LineWidth = 1;
            areaView.ShowMarkers = true;
            areaView.MarkerColor = Color.Purple;
            areaView.MarkerSize = 3;

            // Change the Area series color.  
            if (e.DataSourceValue.ToString() == "Series0") {
                e.View.Color = Color.Red;
            }
            if (e.DataSourceValue.ToString() == "Series1") {
                e.View.Color = Color.Blue;
            }
            if (e.DataSourceValue.ToString() == "Series2") {
                e.View.Color = Color.Orange;
            }
        }

        private void SetUpNumericChartRangeControlClient() {

            // Assign a numeric chart client to the Range control. 
            rangeControl1.Client = numericChartRangeControlClient1;

            // Generate a list of NumericItem objects and bind the numeric chart client to it.
            numericChartRangeControlClient1.DataProvider.DataSource = GenerateNumericData();

            // Handle the CustomizeSeries event.
            numericChartRangeControlClient1.CustomizeSeries += numericChartRangeControlClient1_CustomizeSeries;

            // Specify data members to bind the chart client.         
            numericChartRangeControlClient1.DataProvider.ArgumentDataMember = "Argument";
            numericChartRangeControlClient1.DataProvider.ValueDataMember = "Value";
            numericChartRangeControlClient1.DataProvider.SeriesDataMember = "Series";

            // Customize the grid options of the numeric chart range control client.          
            numericChartRangeControlClient1.GridOptions.GridSpacing = 2;
            numericChartRangeControlClient1.GridOptions.SnapSpacing = 1;
        }

        List<NumericItem> GenerateNumericData() {

            for (int seriesIndex = 0; seriesIndex < seriesCount; seriesIndex++) {
                for (int i = 0; i < pointCount; i++) {
                    data.Add(new NumericItem() {
                        Argument = i,
                        Value = rand.Next(0, 30) + i,
                        Series = "Series" + seriesIndex.ToString()
                    });
                }
            }
            return data;
        }
    }

    public class NumericItem {
        public double Argument { get; set; }
        public double Value { get; set; }
        public string Series { get; set; }
    }
}

Form1.vb

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports System.Drawing
Imports System.Windows.Forms
Imports DevExpress.XtraEditors

Namespace ChartClientCustomizeSeries
    Partial Public Class Form1
        Inherits Form

        Private Const pointCount As Integer = 20
        Private Const seriesCount As Integer = 3
        Private rand As New Random()
        Private data As New List(Of NumericItem)()

        Public Sub New()
            InitializeComponent()
            SetUpNumericChartRangeControlClient()
        End Sub

        Private Sub numericChartRangeControlClient1_CustomizeSeries(ByVal sender As Object, ByVal e As ClientDataSourceProviderCustomizeSeriesEventArgs)

            ' Change the default Line view of the chart client to Area. 
            Dim areaView As New AreaChartRangeControlClientView()
            e.View = areaView

            ' Customize the Area view properties.
            areaView.AreaOpacity = 30
            areaView.LineWidth = 1
            areaView.ShowMarkers = True
            areaView.MarkerColor = Color.Purple
            areaView.MarkerSize = 3

            ' Change the Area series color.  
            If e.DataSourceValue.ToString() = "Series0" Then
                e.View.Color = Color.Red
            End If
            If e.DataSourceValue.ToString() = "Series1" Then
                e.View.Color = Color.Blue
            End If
            If e.DataSourceValue.ToString() = "Series2" Then
                e.View.Color = Color.Orange
            End If
        End Sub

        Private Sub SetUpNumericChartRangeControlClient()

            ' Assign a numeric chart client to the Range control. 
            rangeControl1.Client = numericChartRangeControlClient1

            ' Generate a list of NumericItem objects and bind the numeric chart client to it.
            numericChartRangeControlClient1.DataProvider.DataSource = GenerateNumericData()

            ' Handle the CustomizeSeries event.
            AddHandler numericChartRangeControlClient1.CustomizeSeries, AddressOf numericChartRangeControlClient1_CustomizeSeries

            ' Specify data members to bind the chart client.         
            numericChartRangeControlClient1.DataProvider.ArgumentDataMember = "Argument"
            numericChartRangeControlClient1.DataProvider.ValueDataMember = "Value"
            numericChartRangeControlClient1.DataProvider.SeriesDataMember = "Series"

            ' Customize the grid options of the numeric chart range control client.          
            numericChartRangeControlClient1.GridOptions.GridSpacing = 2
            numericChartRangeControlClient1.GridOptions.SnapSpacing = 1
        End Sub

        Private Function GenerateNumericData() As List(Of NumericItem)

            For seriesIndex As Integer = 0 To seriesCount - 1
                For i As Integer = 0 To pointCount - 1
                    data.Add(New NumericItem() With {.Argument = i, .Value = rand.Next(0, 30) + i, .Series = "Series" & seriesIndex.ToString()})
                Next i
            Next seriesIndex
            Return data
        End Function
    End Class

    Public Class NumericItem
        Private privateArgument As Double
        Public Property Argument() As Double
            Get
                Return privateArgument
            End Get
            Set(ByVal value As Double)
                privateArgument = value
            End Set
        End Property
        Private privateValue As Double
        Public Property Value() As Double
            Get
                Return privateValue
            End Get
            Set(ByVal value As Double)
                privateValue = value
            End Set
        End Property
        Private privateSeries As String
        Public Property Series() As String
            Get
                Return privateSeries
            End Get
            Set(ByVal value As String)
                privateSeries = value
            End Set
        End Property
    End Class
End Namespace