ChartDirector 6.2 (.NET Edition)

Overlapping Bar Chart




This example demonstrates a multi-bar chart in which the bars within a cluster overlaps.

The overlapping effect is configured using BarLayer.setOverlapRatio. This method allows you to specify overlapping ratio and order. In this example, the overlapping ratio is 0.5, while the default overlapping order is used. The default order is that the first data set will stay on top of the second data set, and so on.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\overlapbar.cs
using System;
using ChartDirector;

namespace CSharpChartExplorer
{
    public class overlapbar : DemoModule
    {
        //Name of demo module
        public string getName() { return "Overlapping Bar Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // The data for the bar chart
            double[] data0 = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122};
            double[] data1 = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270};
            double[] data2 = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310};
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept",
                "Oct", "Nov", "Dec"};

            // Create a XYChart object of size 580 x 280 pixels
            XYChart c = new XYChart(580, 280);

            // Add a title to the chart using 14pt Arial Bold Italic font
            c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14);

            // Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background
            // colors (f8f8f8 and ffffff)
            c.setPlotArea(50, 50, 500, 200, 0xf8f8f8, 0xffffff);

            // Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with
            // transparent background.
            c.addLegend(50, 25, false, "Arial", 8).setBackground(Chart.Transparent);

            // Set the x axis labels
            c.xAxis().setLabels(labels);

            // Draw the ticks between label positions (instead of at label positions)
            c.xAxis().setTickOffset(0.5);

            // Add a multi-bar layer with 3 data sets
            BarLayer layer = c.addBarLayer2(Chart.Side);
            layer.addDataSet(data0, 0xff8080, "Year 2003");
            layer.addDataSet(data1, 0x80ff80, "Year 2004");
            layer.addDataSet(data2, 0x8080ff, "Year 2005");

            // Set 50% overlap between bars
            layer.setOverlapRatio(0.5);

            // Add a title to the y-axis
            c.yAxis().setTitle("Revenue (USD in millions)");

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{xLabel} Revenue on {dataSetName}: {value} millions'");
        }
    }
}

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\overlapbar.vb
Imports System
Imports Microsoft.VisualBasic
Imports ChartDirector

Public Class overlapbar
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Overlapping Bar Chart"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 1
    End Function

    'Main code for creating chart.
    'Note: the argument chartIndex is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' The data for the bar chart
        Dim data0() As Double = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122}
        Dim data1() As Double = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270}
        Dim data2() As Double = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310}
        Dim labels() As String = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", _
            "Oct", "Nov", "Dec"}

        ' Create a XYChart object of size 580 x 280 pixels
        Dim c As XYChart = New XYChart(580, 280)

        ' Add a title to the chart using 14pt Arial Bold Italic font
        c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14)

        ' Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background colors
        ' (f8f8f8 and ffffff)
        c.setPlotArea(50, 50, 500, 200, &Hf8f8f8, &Hffffff)

        ' Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with
        ' transparent background.
        c.addLegend(50, 25, False, "Arial", 8).setBackground(Chart.Transparent)

        ' Set the x axis labels
        c.xAxis().setLabels(labels)

        ' Draw the ticks between label positions (instead of at label positions)
        c.xAxis().setTickOffset(0.5)

        ' Add a multi-bar layer with 3 data sets
        Dim layer As BarLayer = c.addBarLayer2(Chart.Side)
        layer.addDataSet(data0, &Hff8080, "Year 2003")
        layer.addDataSet(data1, &H80ff80, "Year 2004")
        layer.addDataSet(data2, &H8080ff, "Year 2005")

        ' Set 50% overlap between bars
        layer.setOverlapRatio(0.5)

        ' Add a title to the y-axis
        c.yAxis().setTitle("Revenue (USD in millions)")

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='{xLabel} Revenue on {dataSetName}: {value} millions'")

    End Sub

End Class

[WPF - C#] NetWPFCharts\overlapbar.cs
using System;
using ChartDirector;

namespace CSharpWPFDemo
{
    public class overlapbar : DemoModule
    {
        //Name of demo module
        public string getName() { return "Overlapping Bar Chart"; }

        //Number of charts produced in this demo module
        public int getNoOfCharts() { return 1; }

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // The data for the bar chart
            double[] data0 = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122};
            double[] data1 = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270};
            double[] data2 = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310};
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept",
                "Oct", "Nov", "Dec"};

            // Create a XYChart object of size 580 x 280 pixels
            XYChart c = new XYChart(580, 280);

            // Add a title to the chart using 14pt Arial Bold Italic font
            c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14);

            // Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background
            // colors (f8f8f8 and ffffff)
            c.setPlotArea(50, 50, 500, 200, 0xf8f8f8, 0xffffff);

            // Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with
            // transparent background.
            c.addLegend(50, 25, false, "Arial", 8).setBackground(Chart.Transparent);

            // Set the x axis labels
            c.xAxis().setLabels(labels);

            // Draw the ticks between label positions (instead of at label positions)
            c.xAxis().setTickOffset(0.5);

            // Add a multi-bar layer with 3 data sets
            BarLayer layer = c.addBarLayer2(Chart.Side);
            layer.addDataSet(data0, 0xff8080, "Year 2003");
            layer.addDataSet(data1, 0x80ff80, "Year 2004");
            layer.addDataSet(data2, 0x8080ff, "Year 2005");

            // Set 50% overlap between bars
            layer.setOverlapRatio(0.5);

            // Add a title to the y-axis
            c.yAxis().setTitle("Revenue (USD in millions)");

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='{xLabel} Revenue on {dataSetName}: {value} millions'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\overlapbar.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // The data for the bar chart
    double[] data0 = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122};
    double[] data1 = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270};
    double[] data2 = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310};
    string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov",
        "Dec"};

    // Create a XYChart object of size 580 x 280 pixels
    XYChart c = new XYChart(580, 280);

    // Add a title to the chart using 14pt Arial Bold Italic font
    c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14);

    // Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background colors
    // (f8f8f8 and ffffff)
    c.setPlotArea(50, 50, 500, 200, 0xf8f8f8, 0xffffff);

    // Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with transparent
    // background.
    c.addLegend(50, 25, false, "Arial", 8).setBackground(Chart.Transparent);

    // Set the x axis labels
    c.xAxis().setLabels(labels);

    // Draw the ticks between label positions (instead of at label positions)
    c.xAxis().setTickOffset(0.5);

    // Add a multi-bar layer with 3 data sets
    BarLayer layer = c.addBarLayer2(Chart.Side);
    layer.addDataSet(data0, 0xff8080, "Year 2003");
    layer.addDataSet(data1, 0x80ff80, "Year 2004");
    layer.addDataSet(data2, 0x8080ff, "Year 2005");

    // Set 50% overlap between bars
    layer.setOverlapRatio(0.5);

    // Add a title to the y-axis
    c.yAxis().setTitle("Revenue (USD in millions)");

    // Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG);

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='{xLabel} Revenue on {dataSetName}: {value} millions'");
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\overlapbar.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

'
' Page Load event handler
'
Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' The data for the bar chart
    Dim data0() As Double = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122}
    Dim data1() As Double = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270}
    Dim data2() As Double = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310}
    Dim labels() As String = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", _
        "Oct", "Nov", "Dec"}

    ' Create a XYChart object of size 580 x 280 pixels
    Dim c As XYChart = New XYChart(580, 280)

    ' Add a title to the chart using 14pt Arial Bold Italic font
    c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14)

    ' Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background colors
    ' (f8f8f8 and ffffff)
    c.setPlotArea(50, 50, 500, 200, &Hf8f8f8, &Hffffff)

    ' Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with transparent
    ' background.
    c.addLegend(50, 25, False, "Arial", 8).setBackground(Chart.Transparent)

    ' Set the x axis labels
    c.xAxis().setLabels(labels)

    ' Draw the ticks between label positions (instead of at label positions)
    c.xAxis().setTickOffset(0.5)

    ' Add a multi-bar layer with 3 data sets
    Dim layer As BarLayer = c.addBarLayer2(Chart.Side)
    layer.addDataSet(data0, &Hff8080, "Year 2003")
    layer.addDataSet(data1, &H80ff80, "Year 2004")
    layer.addDataSet(data2, &H8080ff, "Year 2005")

    ' Set 50% overlap between bars
    layer.setOverlapRatio(0.5)

    ' Add a title to the y-axis
    c.yAxis().setTitle("Revenue (USD in millions)")

    ' Output the chart
    WebChartViewer1.Image = c.makeWebImage(Chart.PNG)

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='{xLabel} Revenue on {dataSetName}: {value} millions'")

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\OverlapbarController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class OverlapbarController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Overlapping Bar Chart";
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The data for the bar chart
            double[] data0 = {100, 125, 156, 147, 87, 124, 178, 109, 140, 106, 192, 122};
            double[] data1 = {122, 156, 179, 211, 198, 177, 160, 220, 190, 188, 220, 270};
            double[] data2 = {167, 190, 213, 267, 250, 320, 212, 199, 245, 267, 240, 310};
            string[] labels = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct",
                "Nov", "Dec"};

            // Create a XYChart object of size 580 x 280 pixels
            XYChart c = new XYChart(580, 280);

            // Add a title to the chart using 14pt Arial Bold Italic font
            c.addTitle("Product Revenue For Last 3 Years", "Arial Bold Italic", 14);

            // Set the plot area at (50, 50) and of size 500 x 200. Use two alternative background colors
            // (f8f8f8 and ffffff)
            c.setPlotArea(50, 50, 500, 200, 0xf8f8f8, 0xffffff);

            // Add a legend box at (50, 25) using horizontal layout. Use 8pt Arial as font, with
            // transparent background.
            c.addLegend(50, 25, false, "Arial", 8).setBackground(Chart.Transparent);

            // Set the x axis labels
            c.xAxis().setLabels(labels);

            // Draw the ticks between label positions (instead of at label positions)
            c.xAxis().setTickOffset(0.5);

            // Add a multi-bar layer with 3 data sets
            BarLayer layer = c.addBarLayer2(Chart.Side);
            layer.addDataSet(data0, 0xff8080, "Year 2003");
            layer.addDataSet(data1, 0x80ff80, "Year 2004");
            layer.addDataSet(data2, 0x8080ff, "Year 2005");

            // Set 50% overlap between bars
            layer.setOverlapRatio(0.5);

            // Add a title to the y-axis
            c.yAxis().setTitle("Revenue (USD in millions)");

            // Output the chart
            viewer.Image = c.makeWebImage(Chart.PNG);

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "",
                "title='{xLabel} Revenue on {dataSetName}: {value} millions'");
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; }

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        @ViewBag.Title
    </div>
    <hr style="border:solid 1px #000080" />
    <div>
        @{
            if (ViewBag.Viewer is Array)
            {
                // Display multiple charts
                for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                {
                    @:@Html.Raw(ViewBag.Viewer[i].RenderHTML())
                }
            }
            else
            {
                // Display one chart only
                @:@Html.Raw(ViewBag.Viewer.RenderHTML())
            }
        }
    </div>
</body>
</html>