ChartDirector 6.2 (.NET Edition)

Bar Labels




This example extends the Simple Bar Chart (1) example by including bar labels on the bars, and decorating the bars with rounded corners and gradient shading.

Source Code Listing

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

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

        //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[] data = {85, 156, 179, 211, 123, 189, 166};

            // The labels for the bar chart
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};

            // Create a XYChart object of size 600 x 360 pixels
            XYChart c = new XYChart(600, 360);

            // Set default text color to dark grey (0x333333)
            c.setColor(Chart.TextColor, 0x333333);

            // Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent
            // background and border and light grey (0xcccccc) horizontal grid lines
            c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

            // Set the x and y axis stems to transparent and the label font to 12pt Arial
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);
            c.xAxis().setLabelStyle("Arial", 12);
            c.yAxis().setLabelStyle("Arial", 12);

            // Add a blue (0x6699bb) bar chart layer using the given data
            BarLayer layer = c.addBarLayer(data, 0x6699bb);

            // Use bar gradient lighting with the light intensity from 0.8 to 1.3
            layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3));

            // Set rounded corners for bars
            layer.setRoundedCorners();

            // Display labela on top of bars using 12pt Arial font
            layer.setAggregateLabelStyle("Arial", 12);

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

            // For the automatic y-axis labels, set the minimum spacing to 40 pixels.
            c.yAxis().setTickDensity(40);

            // Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
            c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, 0x555555);

            // Output the chart
            viewer.Chart = c;

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

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

Public Class barlabel
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Bar Labels"
    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 data() As Double = {85, 156, 179, 211, 123, 189, 166}

        ' The labels for the bar chart
        Dim labels() As String = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"}

        ' Create a XYChart object of size 600 x 360 pixels
        Dim c As XYChart = New XYChart(600, 360)

        ' Set default text color to dark grey (0x333333)
        c.setColor(Chart.TextColor, &H333333)

        ' Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and
        ' border and light grey (0xcccccc) horizontal grid lines
        c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, &Hcccccc)

        ' Set the x and y axis stems to transparent and the label font to 12pt Arial
        c.xAxis().setColors(Chart.Transparent)
        c.yAxis().setColors(Chart.Transparent)
        c.xAxis().setLabelStyle("Arial", 12)
        c.yAxis().setLabelStyle("Arial", 12)

        ' Add a blue (0x6699bb) bar chart layer using the given data
        Dim layer As BarLayer = c.addBarLayer(data, &H6699bb)

        ' Use bar gradient lighting with the light intensity from 0.8 to 1.3
        layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3))

        ' Set rounded corners for bars
        layer.setRoundedCorners()

        ' Display labela on top of bars using 12pt Arial font
        layer.setAggregateLabelStyle("Arial", 12)

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

        ' For the automatic y-axis labels, set the minimum spacing to 40 pixels.
        c.yAxis().setTickDensity(40)

        ' Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
        c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, &H555555)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", "title='{xLabel}: ${value}M'")

    End Sub

End Class

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

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

        //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[] data = {85, 156, 179, 211, 123, 189, 166};

            // The labels for the bar chart
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};

            // Create a XYChart object of size 600 x 360 pixels
            XYChart c = new XYChart(600, 360);

            // Set default text color to dark grey (0x333333)
            c.setColor(Chart.TextColor, 0x333333);

            // Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent
            // background and border and light grey (0xcccccc) horizontal grid lines
            c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

            // Set the x and y axis stems to transparent and the label font to 12pt Arial
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);
            c.xAxis().setLabelStyle("Arial", 12);
            c.yAxis().setLabelStyle("Arial", 12);

            // Add a blue (0x6699bb) bar chart layer using the given data
            BarLayer layer = c.addBarLayer(data, 0x6699bb);

            // Use bar gradient lighting with the light intensity from 0.8 to 1.3
            layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3));

            // Set rounded corners for bars
            layer.setRoundedCorners();

            // Display labela on top of bars using 12pt Arial font
            layer.setAggregateLabelStyle("Arial", 12);

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

            // For the automatic y-axis labels, set the minimum spacing to 40 pixels.
            c.yAxis().setTickDensity(40);

            // Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
            c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, 0x555555);

            // Output the chart
            viewer.Chart = c;

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

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\barlabel.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[] data = {85, 156, 179, 211, 123, 189, 166};

    // The labels for the bar chart
    string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};

    // Create a XYChart object of size 600 x 360 pixels
    XYChart c = new XYChart(600, 360);

    // Set default text color to dark grey (0x333333)
    c.setColor(Chart.TextColor, 0x333333);

    // Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and
    // border and light grey (0xcccccc) horizontal grid lines
    c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

    // Set the x and y axis stems to transparent and the label font to 12pt Arial
    c.xAxis().setColors(Chart.Transparent);
    c.yAxis().setColors(Chart.Transparent);
    c.xAxis().setLabelStyle("Arial", 12);
    c.yAxis().setLabelStyle("Arial", 12);

    // Add a blue (0x6699bb) bar chart layer using the given data
    BarLayer layer = c.addBarLayer(data, 0x6699bb);

    // Use bar gradient lighting with the light intensity from 0.8 to 1.3
    layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3));

    // Set rounded corners for bars
    layer.setRoundedCorners();

    // Display labela on top of bars using 12pt Arial font
    layer.setAggregateLabelStyle("Arial", 12);

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

    // For the automatic y-axis labels, set the minimum spacing to 40 pixels.
    c.yAxis().setTickDensity(40);

    // Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
    c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, 0x555555);

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

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

</script>

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

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\barlabel.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 data() As Double = {85, 156, 179, 211, 123, 189, 166}

    ' The labels for the bar chart
    Dim labels() As String = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"}

    ' Create a XYChart object of size 600 x 360 pixels
    Dim c As XYChart = New XYChart(600, 360)

    ' Set default text color to dark grey (0x333333)
    c.setColor(Chart.TextColor, &H333333)

    ' Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and
    ' border and light grey (0xcccccc) horizontal grid lines
    c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, &Hcccccc)

    ' Set the x and y axis stems to transparent and the label font to 12pt Arial
    c.xAxis().setColors(Chart.Transparent)
    c.yAxis().setColors(Chart.Transparent)
    c.xAxis().setLabelStyle("Arial", 12)
    c.yAxis().setLabelStyle("Arial", 12)

    ' Add a blue (0x6699bb) bar chart layer using the given data
    Dim layer As BarLayer = c.addBarLayer(data, &H6699bb)

    ' Use bar gradient lighting with the light intensity from 0.8 to 1.3
    layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3))

    ' Set rounded corners for bars
    layer.setRoundedCorners()

    ' Display labela on top of bars using 12pt Arial font
    layer.setAggregateLabelStyle("Arial", 12)

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

    ' For the automatic y-axis labels, set the minimum spacing to 40 pixels.
    c.yAxis().setTickDensity(40)

    ' Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
    c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, &H555555)

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

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", "title='{xLabel}: ${value}M'")

End Sub

</script>

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

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

namespace NetMvcCharts.Controllers
{
    public class BarlabelController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Bar Labels";
            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[] data = {85, 156, 179, 211, 123, 189, 166};

            // The labels for the bar chart
            string[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};

            // Create a XYChart object of size 600 x 360 pixels
            XYChart c = new XYChart(600, 360);

            // Set default text color to dark grey (0x333333)
            c.setColor(Chart.TextColor, 0x333333);

            // Set the plotarea at (70, 20) and of size 500 x 300 pixels, with transparent background and
            // border and light grey (0xcccccc) horizontal grid lines
            c.setPlotArea(70, 20, 500, 300, Chart.Transparent, -1, Chart.Transparent, 0xcccccc);

            // Set the x and y axis stems to transparent and the label font to 12pt Arial
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);
            c.xAxis().setLabelStyle("Arial", 12);
            c.yAxis().setLabelStyle("Arial", 12);

            // Add a blue (0x6699bb) bar chart layer using the given data
            BarLayer layer = c.addBarLayer(data, 0x6699bb);

            // Use bar gradient lighting with the light intensity from 0.8 to 1.3
            layer.setBorderColor(Chart.Transparent, Chart.barLighting(0.8, 1.3));

            // Set rounded corners for bars
            layer.setRoundedCorners();

            // Display labela on top of bars using 12pt Arial font
            layer.setAggregateLabelStyle("Arial", 12);

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

            // For the automatic y-axis labels, set the minimum spacing to 40 pixels.
            c.yAxis().setTickDensity(40);

            // Add a title to the y axis using dark grey (0x555555) 14pt Arial Bold font
            c.yAxis().setTitle("Y-Axis Title Placeholder", "Arial Bold", 14, 0x555555);

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

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

[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>