Side-by-Side Stacked Bar Chart

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Short Description

The Side-by-Side Stacked Bar Chart is represented by the SideBySideStackedBarSeriesView object, which belongs to Bar and Column Series Views. This view combines the advantages of both the Stacked Bar and Side-by-Side Bar chart types, so that you can stack different bars, and combine them into groups shown side-by-side across the same axis value (via the SideBySideStackedBarSeriesView.StackedGroup property).

Note

When you use series template binding for Side-by-Side Stacked Bars, the SideBySideStackedBarSeriesView.StackedGroup property should be specified at runtime, in the WebChartControl.BoundDataChanged event handler.

A Side-by-Side Stacked Bar chart is shown in the image below. Note that this chart type is based upon the XYDiagram, so it can be rotated to show bars either vertically or horizontally.

SeriesView_SideBySideStackedBar

Note

A Side-by-Side Stacked Bar chart can display series that contain data points with positive or negative values. A series with positive values, however, is stacked only with other series that contain positive values; and a series with negative values is stacked with other series that contain negative values.

Note that if a series contains data points with both positive and negative values, it is treated as a series with positive values, while all its negative values are treated as zeros.

Chart Type Characteristics

The table below lists the main characteristics of this chart type.

Feature Value
Series View type SideBySideStackedBarSeriesView
Diagram type 2D-XYDiagram
Number of arguments per series point 1
Number of values per series point 1

Note

For information on which chart types can be combined with the Side-by-Side Stacked Bar Chart, refer to the following help topic: Combining Different Series Views.

Example

The following example creates a WebChartControl and generates multiple SideBySideStackedBarSeriesView type series based on a template at runtime. For more information on how to create a chart at runtime, refer to the following topic: How to: Add a Chart to a Web Page (Runtime Sample).

Side-by-side stacked bar chart sample

To create multiple series based on a template, specify the following SeriesTemplate properties:

To specify a group to which a stacked bar belongs, specify the SideBySideStackedBarSeriesView.StackedGroup for each generated series. Handle the BoundDataChanged event to access the collection of these series.

using DevExpress.XtraCharts;
using DevExpress.XtraCharts.Web;
using System;
using System.Data;

namespace StackedBarChart {
    public partial class WebForm1 : System.Web.UI.Page {
        WebChartControl chart;
        protected void Page_Load(object sender, EventArgs e) {
            // Create a new chart.
            chart = new WebChartControl();
            chart.Height = 315;
            chart.Width = 560;
            chart.RenderFormat = RenderFormat.Svg;
            this.Controls.Add(chart);

            // Bind the chart to a data source.
            // Specify data members that the series template uses to
            // obtain series names, arguments, and values.
            chart.DataSource = GetChartData();
            chart.SeriesTemplate.SeriesDataMember = "Month";
            chart.SeriesTemplate.ArgumentDataMember = "Section";
            chart.SeriesTemplate.ValueDataMembers.AddRange(new string[] { "Value" });
            chart.DataBind();

            // Assign the Side-by-Side Stacked Bar series view to generated series.
            SideBySideStackedBarSeriesView view = new SideBySideStackedBarSeriesView();
            chart.SeriesTemplate.View = view;

            //Enable point labels and format their text.
            chart.SeriesTemplate.LabelsVisibility = DevExpress.Utils.DefaultBoolean.True;
            chart.SeriesTemplate.Label.TextPattern = "{V}";

            // Customize axes.
            XYDiagram diagram = chart.Diagram as XYDiagram;
            diagram.AxisX.Tickmarks.MinorVisible = false;
            diagram.AxisY.WholeRange.AlwaysShowZeroLevel = false;

            chart.BoundDataChanged += Chart_BoundDataChanged;
        }

        private void Chart_BoundDataChanged(object sender, EventArgs e) {
            foreach (Series series in chart.Series) {
                if (series.Points.Count > 0) {
                    DataRowView row = series.Points[0].Tag as DataRowView;
                    ((ISupportStackedGroup)series.View).StackedGroup = row["Group"];
                }
            }
        }

        public DataTable GetChartData() {
            DataTable table = new DataTable();
            table.Columns.Add("Month", typeof(string));
            table.Columns.Add("Section", typeof(string));
            table.Columns.Add("Value", typeof(int));
            table.Columns.Add("Group", typeof(int));

            table.Rows.Add(new object[] { "January", "Section1", 10, 1 });
            table.Rows.Add(new object[] { "January", "Section2", 20, 1 });
            table.Rows.Add(new object[] { "February", "Section1", 20, 1 });
            table.Rows.Add(new object[] { "February", "Section2", 30, 2 });
            table.Rows.Add(new object[] { "March", "Section1", 15, 2 });
            table.Rows.Add(new object[] { "March", "Section2", 25, 1 });
            return table;
        }
    }
}

Tip

For the complete sample project, see the following DevExpress Support Center example: https://supportcenter.devexpress.com/ticket/details/e2092/chart-control-for-winforms-how-to-create-a-side-by-side-stacked-bar-chart.