WaterfallRelativeValueOptions Class

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v21.1.dll

Declaration

public class WaterfallRelativeValueOptions :
    WaterfallValueOptionsBase

Public Class WaterfallRelativeValueOptions
    Inherits WaterfallValueOptionsBase

Remarks

Use the WaterfallRelativeValueOptions when the chart data source stores differences between absolute values.

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

If the data source stores absolute data values, use the WaterfallAbsoluteValueOptions class instead of WaterfallRelativeValueOptions.

Example

This example shows how to create a chart with a data series of the waterfall view.

• Add a series to a chart.
• Specify the series data members.
• Use the WaterfallSeriesView object to configure the series view options.

• Specify value options. If data source stores value differences, use the WaterfallRelativeValueOptions. Use the WaterfallAbsoluteValueOptions class if the data source stores absolute data values.

  • C#
  • VB.NET

  private void Form1_Load(object sender, EventArgs e) {
      chartControl1.DataSource = LoadDataTableFromXml("../../Data/carbon.xml", "CarbonContribution");
      Series series = new Series("Carbon Balance", ViewType.Waterfall);
      series.SetDataMembers("Year", "Contribution");
      series.ArgumentScaleType = ScaleType.Qualitative;
      chartControl1.Series.Add(series);
      ((WaterfallSeriesLabel)series.Label).Position = WaterfallSeriesLabelPosition.OutsideEnd;
      series.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True;
      WaterfallSeriesView view = series.View as WaterfallSeriesView;
      if (view != null) {
          view.RisingBarColor = Color.FromArgb(218, 88, 89);
          view.FallingBarColor = Color.FromArgb(146, 206, 181);
          view.SubtotalBarColor = Color.Gray;
          view.TotalBarColor = Color.DarkGray;
          view.StartBarColor = Color.LightGray;
          view.ConnectorColor = Color.Black;
          view.ConnectorStyle.Thickness = 1;
          WaterfallRelativeValueOptions valueOptions = view.ValueOptions as WaterfallRelativeValueOptions;
          if (valueOptions != null) {
              valueOptions.StartBarLabel = "1989";
              valueOptions.StartBarValue = 2766D;
              valueOptions.ShowTotal = true;
              valueOptions.TotalLabel = "2018";
              valueOptions.Subtotals.Add(new Subtotal { PointIndex = 16, Label= "February 16, 2005" });
          }
      }  
  }