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WaterfallSeries2D Class

Represents the Waterfall series.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v22.1.dll

Declaration

public class WaterfallSeries2D :
    BarStackedSeries2D,
    IWaterfallSeriesView

Remarks

A data source for a waterfall chart can store relative and absolute data values.

For a chart with relative data, you can add a start bar with a given value and label. To do this, set the ValueOptions property to WaterfallRelativeValueOptions. Then, specify the WaterfallRelativeValueOptions.StartBarValue and WaterfallRelativeValueOptions.StartBarLabel properties.

If the data source stores absolute data values, set the ValueOptions property to the WaterfallAbsoluteValueOptions type.

The Waterfall chart displays a Total bar. To change its label, use the WaterfallValueOptionsBase.TotalLabel property. To hide the total bar, set WaterfallValueOptionsBase.ShowTotal to false.

You can add sets of subtotals. To do this, populate the WaterfallValueOptionsBase.Subtotals collection with Subtotal objects.

Use the following properties to change the appearance of waterfall chart elements:

Example

This example shows how to create a waterfall chart.

Waterfall chart

  • Create a ChartControl and specify its ChartControl.Diagram property to an XYDiagram2D object. Note that the ChartControl.Diagram is a content property. You can declare a diagram in XAML directly after a chart control’s declaration without wrapping it in opening and closing ChartControl.Diagram tags.

  • Add a WaterfallSeries2D object to the Diagram.Series collection. Note that the Diagram.Series is a content property. You can declare series in XAML directly after a diagram’s declaration without wrapping them in opening and closing Diagram.Series tags.

  • Use the following properties to bind the series to data:

  • Use the WaterfallSeries2D.ValueOptions property to set value options. If data source stores value differences, use the WaterfallRelativeValueOptions. Use the WaterfallAbsoluteValueOptions class if the data source stores absolute data values.

Markup:

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WaterfallChart"
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts" 
        x:Class="WaterfallChart.MainWindow"
        mc:Ignorable="d"
        Title="MainWindow" Height="500" Width="800">
    <Grid>
        <dxc:ChartControl>
            <dxc:XYDiagram2D dxc:WaterfallSeries2D.TotalBarBrush="Gray"
                             dxc:WaterfallSeries2D.StartBarBrush="LightGray"
                             dxc:WaterfallSeries2D.SubtotalBarBrush="DarkGray"
                             dxc:WaterfallSeries2D.ConnectorBrush="Black">
                <dxc:WaterfallSeries2D.ValueOptions>
                    <dxc:WaterfallRelativeValueOptions StartBarValue="30" 
                                                       StartBarLabel="Start Value"
                                                       ShowTotal="True"
                                                       TotalLabel="Total">
                        <dxc:WaterfallRelativeValueOptions.Subtotals>
                            <dxc:Subtotal PointIndex="2" Label="Subtotal"/>
                        </dxc:WaterfallRelativeValueOptions.Subtotals>
                    </dxc:WaterfallRelativeValueOptions>
                </dxc:WaterfallSeries2D.ValueOptions>
                <dxc:WaterfallSeries2D DisplayName="Waterfall" 
                                       LabelsVisibility="True"
                                       DataSource="{Binding}"
                                       ArgumentScaleType="Qualitative"
                                       ArgumentDataMember="Argument"
                                       ValueDataMember="Value"
                                       RisingBarBrush="#FF92CEB5" 
                                       FallingBarBrush="#FFDA5859">
                    <dxc:WaterfallSeries2D.Model>
                        <dxc:BorderlessSimpleWaterfall2DModel/>
                    </dxc:WaterfallSeries2D.Model>
                </dxc:WaterfallSeries2D>
                <dxc:XYDiagram2D.AxisX>
                    <dxc:AxisX2D TickmarksMinorVisible="False"/>
                </dxc:XYDiagram2D.AxisX>
            </dxc:XYDiagram2D>
        </dxc:ChartControl>
    </Grid>
</Window>

Code-behind:

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

namespace WaterfallChart {
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window {
        public MainWindow() {
            InitializeComponent();
            this.DataContext = DataLoader.GetDataPoints();
        }
    }
    class DataLoader {
        public static List<DataPoint> GetDataPoints() {
            List<DataPoint> list = new List<DataPoint> {
                new DataPoint("November", 20),
                new DataPoint("December", 10),
                new DataPoint("January", -15),
                new DataPoint("February", 10),
                new DataPoint("March", -10)
            };
            return list;
        }
    }
    public class DataPoint {
        public string Argument { get; private set; }
        public double Value { get; private set; }
        public DataPoint(string arg, double val) {
            Argument = arg;
            Value = val;
        }
    }
}

Implements

See Also