ChartDirector 6.2 (.NET Edition)

Custom Scatter Labels




This example demonstrates adding custom labels to data points.

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class scatterlabels : DemoModule
    {
        //Name of demo module
        public string getName() { return "Custom Scatter 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 XY points for the scatter chart
            double[] dataX = {150, 400, 300, 1500, 800};
            double[] dataY = {0.6, 8, 5.4, 2, 4};

            // The labels for the points
            string[] labels = {"Nano\n100", "SpeedTron\n200 Lite", "SpeedTron\n200",
                "Marathon\nExtra", "Marathon\n2000"};

            // Create a XYChart object of size 450 x 400 pixels
            XYChart c = new XYChart(450, 400);

            // Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
            // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
            // (0xc0c0c0)
            c.setPlotArea(55, 40, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the chart using 18pt Times Bold Itatic font.
            c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
            ScatterLayer layer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, 15,
                0xff3333, 0xff3333);

            // Add labels to the chart as an extra field
            layer.addExtraField(labels);

            // Set the data label format to display the extra field
            layer.setDataLabelFormat("{field0}");

            // Use 8pt Arial Bold to display the labels
            ChartDirector.TextBox textbox = layer.setDataLabelStyle("Arial Bold", 8);

            // Set the background to purple with a 1 pixel 3D border
            textbox.setBackground(0xcc99ff, Chart.Transparent, 1);

            // Put the text box 4 pixels to the right of the data point
            textbox.setAlignment(Chart.Left);
            textbox.setPos(4, 0);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Range = {x} miles, Capacity = {value} tons'");
        }
    }
}

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

Public Class scatterlabels
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Custom Scatter 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 XY points for the scatter chart
        Dim dataX() As Double = {150, 400, 300, 1500, 800}
        Dim dataY() As Double = {0.6, 8, 5.4, 2, 4}

        ' The labels for the points
        Dim labels() As String = {"Nano<*br*>100", "SpeedTron<*br*>200 Lite", _
            "SpeedTron<*br*>200", "Marathon<*br*>Extra", "Marathon<*br*>2000"}

        ' Create a XYChart object of size 450 x 400 pixels
        Dim c As XYChart = New XYChart(450, 400)

        ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
        ' (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
        ' (0xc0c0c0)
        c.setPlotArea(55, 40, 350, 300, &Hffffff, -1, &Hc0c0c0, &Hc0c0c0, -1)

        ' Add a title to the chart using 18pt Times Bold Itatic font.
        c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18)

        ' Add a title to the y axis using 12pt Arial Bold Italic font
        c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12)

        ' Add a title to the x axis using 12pt Arial Bold Italic font
        c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12)

        ' Set the axes line width to 3 pixels
        c.xAxis().setWidth(3)
        c.yAxis().setWidth(3)

        ' Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
        Dim layer As ScatterLayer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, _
            15, &Hff3333, &Hff3333)

        ' Add labels to the chart as an extra field
        layer.addExtraField(labels)

        ' Set the data label format to display the extra field
        layer.setDataLabelFormat("{field0}")

        ' Use 8pt Arial Bold to display the labels
        Dim textbox As ChartDirector.TextBox = layer.setDataLabelStyle("Arial Bold", 8)

        ' Set the background to purple with a 1 pixel 3D border
        textbox.setBackground(&Hcc99ff, Chart.Transparent, 1)

        ' Put the text box 4 pixels to the right of the data point
        textbox.setAlignment(Chart.Left)
        textbox.setPos(4, 0)

        ' Output the chart
        viewer.Chart = c

        'include tool tip for the chart
        viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
            "title='Range = {x} miles, Capacity = {value} tons'")

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class scatterlabels : DemoModule
    {
        //Name of demo module
        public string getName() { return "Custom Scatter 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 XY points for the scatter chart
            double[] dataX = {150, 400, 300, 1500, 800};
            double[] dataY = {0.6, 8, 5.4, 2, 4};

            // The labels for the points
            string[] labels = {"Nano\n100", "SpeedTron\n200 Lite", "SpeedTron\n200",
                "Marathon\nExtra", "Marathon\n2000"};

            // Create a XYChart object of size 450 x 400 pixels
            XYChart c = new XYChart(450, 400);

            // Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
            // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
            // (0xc0c0c0)
            c.setPlotArea(55, 40, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the chart using 18pt Times Bold Itatic font.
            c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
            ScatterLayer layer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, 15,
                0xff3333, 0xff3333);

            // Add labels to the chart as an extra field
            layer.addExtraField(labels);

            // Set the data label format to display the extra field
            layer.setDataLabelFormat("{field0}");

            // Use 8pt Arial Bold to display the labels
            ChartDirector.TextBox textbox = layer.setDataLabelStyle("Arial Bold", 8);

            // Set the background to purple with a 1 pixel 3D border
            textbox.setBackground(0xcc99ff, Chart.Transparent, 1);

            // Put the text box 4 pixels to the right of the data point
            textbox.setAlignment(Chart.Left);
            textbox.setPos(4, 0);

            // Output the chart
            viewer.Chart = c;

            //include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("clickable", "",
                "title='Range = {x} miles, Capacity = {value} tons'");
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\scatterlabels.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 XY points for the scatter chart
    double[] dataX = {150, 400, 300, 1500, 800};
    double[] dataY = {0.6, 8, 5.4, 2, 4};

    // The labels for the points
    string[] labels = {"Nano\n100", "SpeedTron\n200 Lite", "SpeedTron\n200", "Marathon\nExtra",
        "Marathon\n2000"};

    // Create a XYChart object of size 450 x 400 pixels
    XYChart c = new XYChart(450, 400);

    // Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
    // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
    c.setPlotArea(55, 40, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

    // Add a title to the chart using 18pt Times Bold Itatic font.
    c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18);

    // Add a title to the y axis using 12pt Arial Bold Italic font
    c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12);

    // Add a title to the x axis using 12pt Arial Bold Italic font
    c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12);

    // Set the axes line width to 3 pixels
    c.xAxis().setWidth(3);
    c.yAxis().setWidth(3);

    // Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
    ScatterLayer layer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, 15, 0xff3333,
        0xff3333);

    // Add labels to the chart as an extra field
    layer.addExtraField(labels);

    // Set the data label format to display the extra field
    layer.setDataLabelFormat("{field0}");

    // Use 8pt Arial Bold to display the labels
    ChartDirector.TextBox textbox = layer.setDataLabelStyle("Arial Bold", 8);

    // Set the background to purple with a 1 pixel 3D border
    textbox.setBackground(0xcc99ff, Chart.Transparent, 1);

    // Put the text box 4 pixels to the right of the data point
    textbox.setAlignment(Chart.Left);
    textbox.setPos(4, 0);

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

    // Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "",
        "title='Range = {x} miles, Capacity = {value} tons'");
}

</script>

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

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\scatterlabels.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 XY points for the scatter chart
    Dim dataX() As Double = {150, 400, 300, 1500, 800}
    Dim dataY() As Double = {0.6, 8, 5.4, 2, 4}

    ' The labels for the points
    Dim labels() As String = {"Nano<*br*>100", "SpeedTron<*br*>200 Lite", "SpeedTron<*br*>200", _
        "Marathon<*br*>Extra", "Marathon<*br*>2000"}

    ' Create a XYChart object of size 450 x 400 pixels
    Dim c As XYChart = New XYChart(450, 400)

    ' Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
    ' (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
    c.setPlotArea(55, 40, 350, 300, &Hffffff, -1, &Hc0c0c0, &Hc0c0c0, -1)

    ' Add a title to the chart using 18pt Times Bold Itatic font.
    c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18)

    ' Add a title to the y axis using 12pt Arial Bold Italic font
    c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12)

    ' Add a title to the x axis using 12pt Arial Bold Italic font
    c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12)

    ' Set the axes line width to 3 pixels
    c.xAxis().setWidth(3)
    c.yAxis().setWidth(3)

    ' Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
    Dim layer As ScatterLayer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, 15, _
        &Hff3333, &Hff3333)

    ' Add labels to the chart as an extra field
    layer.addExtraField(labels)

    ' Set the data label format to display the extra field
    layer.setDataLabelFormat("{field0}")

    ' Use 8pt Arial Bold to display the labels
    Dim textbox As ChartDirector.TextBox = layer.setDataLabelStyle("Arial Bold", 8)

    ' Set the background to purple with a 1 pixel 3D border
    textbox.setBackground(&Hcc99ff, Chart.Transparent, 1)

    ' Put the text box 4 pixels to the right of the data point
    textbox.setAlignment(Chart.Left)
    textbox.setPos(4, 0)

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

    ' Include tool tip for the chart
    WebChartViewer1.ImageMap = c.getHTMLImageMap("", "", _
        "title='Range = {x} miles, Capacity = {value} tons'")

End Sub

</script>

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

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

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

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The XY points for the scatter chart
            double[] dataX = {150, 400, 300, 1500, 800};
            double[] dataY = {0.6, 8, 5.4, 2, 4};

            // The labels for the points
            string[] labels = {"Nano\n100", "SpeedTron\n200 Lite", "SpeedTron\n200", "Marathon\nExtra",
                "Marathon\n2000"};

            // Create a XYChart object of size 450 x 400 pixels
            XYChart c = new XYChart(450, 400);

            // Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border
            // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color
            // (0xc0c0c0)
            c.setPlotArea(55, 40, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1);

            // Add a title to the chart using 18pt Times Bold Itatic font.
            c.addTitle("Product Comparison Chart", "Times New Roman Bold Italic", 18);

            // Add a title to the y axis using 12pt Arial Bold Italic font
            c.yAxis().setTitle("Capacity (tons)", "Arial Bold Italic", 12);

            // Add a title to the x axis using 12pt Arial Bold Italic font
            c.xAxis().setTitle("Range (miles)", "Arial Bold Italic", 12);

            // Set the axes line width to 3 pixels
            c.xAxis().setWidth(3);
            c.yAxis().setWidth(3);

            // Add the data as a scatter chart layer, using a 15 pixel circle as the symbol
            ScatterLayer layer = c.addScatterLayer(dataX, dataY, "", Chart.GlassSphereShape, 15,
                0xff3333, 0xff3333);

            // Add labels to the chart as an extra field
            layer.addExtraField(labels);

            // Set the data label format to display the extra field
            layer.setDataLabelFormat("{field0}");

            // Use 8pt Arial Bold to display the labels
            ChartDirector.TextBox textbox = layer.setDataLabelStyle("Arial Bold", 8);

            // Set the background to purple with a 1 pixel 3D border
            textbox.setBackground(0xcc99ff, Chart.Transparent, 1);

            // Put the text box 4 pixels to the right of the data point
            textbox.setAlignment(Chart.Left);
            textbox.setPos(4, 0);

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

            // Include tool tip for the chart
            viewer.ImageMap = c.getHTMLImageMap("", "",
                "title='Range = {x} miles, Capacity = {value} tons'");
        }
    }
}

[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>