How to: Bind a Date-Time Chart Range Control Client to a List of Custom Objects

• Jun 07, 2019
• 2 minutes to read

This example demonstrates how to use the date-time chart client for a range control to display a chart with date-time data within the range control’s viewport.

In this example a date-time chart range control client is bound to a System.Collections.Generic.List containing DateTimeItem objects.

Each DateTimeItem object contains Argument and Value properties, to which a date-time chart range control client is bound via its ChartRangeControlClient.ArgumentDataMember and ChartRangeControlClient.ValueDataMember properties.

See also:

• How to: Bind a Numeric Chart Range Control Client to an Array of Simple Type Objects;
• How to: Bind a Numeric Chart Range Control Client to a List of Custom Objects.

MainWindow.xaml.vb

Imports System
Imports System.Collections.Generic
Imports System.Windows

Namespace DateTimeChartRangeControlClient

    Public Class DateTimeItem
        Public Property Argument() As Object
        Public Property Value() As Object
    End Class

    Partial Public Class MainWindow
        Inherits Window

        Private Const dataCount As Integer = 100
        Private data As New List(Of DateTimeItem)()

        Private Function GenerateDateTimeData() As List(Of DateTimeItem)
            Dim now As Date = Date.Now.Date
            Dim rand As New Random()
            Dim value As Double = 0
            For i As Integer = 0 To dataCount - 1
                now = now.AddDays(1)
                value += (rand.NextDouble() - 0.5)
                data.Add(New DateTimeItem() With {.Argument = now, .Value = value + Math.Sin(i * 0.6)})
            Next i
            Return data
        End Function

        Public Sub New()
            InitializeComponent()
            Me.DataContext = GenerateDateTimeData()
        End Sub
    End Class
End Namespace

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors" 
        xmlns:Custom="http://schemas.devexpress.com/winfx/2008/xaml/charts/rangecontrolclient" 
        x:Class="DateTimeChartRangeControlClient.MainWindow"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxe:RangeControl>
            <dxe:RangeControl.Client>
                <Custom:DateTimeChartRangeControlClient
                       ItemsSource="{Binding}" ArgumentDataMember="Argument" ValueDataMember="Value"                                                         
                       GridSpacing="4" GridAlignment="Week" >
                    <Custom:DateTimeChartRangeControlClient.View>
                        <Custom:RangeControlClientBarView/>
                    </Custom:DateTimeChartRangeControlClient.View>
                </Custom:DateTimeChartRangeControlClient>
            </dxe:RangeControl.Client>
        </dxe:RangeControl>
    </Grid>
</Window>

MainWindow.xaml.cs

using System;
using System.Collections.Generic;
using System.Windows;

namespace DateTimeChartRangeControlClient {

    public class DateTimeItem {
        public object Argument { get; set; }
        public object Value { get; set; }
    }

    public partial class MainWindow : Window {

        const int dataCount = 100;
        List<DateTimeItem> data = new List<DateTimeItem>();

        List<DateTimeItem> GenerateDateTimeData() {
            DateTime now = DateTime.Now.Date;
            Random rand = new Random();
            double value = 0;
            for (int i = 0; i < dataCount; i++) {
                now = now.AddDays(1);
                value += (rand.NextDouble() - 0.5);
                data.Add(new DateTimeItem() { Argument = now, Value = value + Math.Sin(i * 0.6) });
            }
            return data;
        }

        public MainWindow() {
            InitializeComponent();
            this.DataContext = GenerateDateTimeData();
        }
    }
}