Track Line with Data Labels (Web)

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\tracklabel.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" %>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // Data for the chart as 3 random data series
    RanSeries r = new RanSeries(127);
    double[] data0 = r.getSeries(100, 100, -15, 15);
    double[] data1 = r.getSeries(100, 150, -15, 15);
    double[] data2 = r.getSeries(100, 200, -15, 15);
    DateTime[] timeStamps = r.getDateSeries(100, new DateTime(2011, 1, 1), 86400);

    // Create a XYChart object of size 640 x 400 pixels
    XYChart c = new XYChart(640, 400);

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

    // Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels
    // less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff)
    // as background. Set border to transparent and grid lines to white (ffffff).
    c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
        c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);

    // Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
    // background and border color to Transparent.
    c.addLegend(50, 25, false, "Arial Bold", 10).setBackground(Chart.Transparent);

    // Set axis label style to 8pt Arial Bold
    c.xAxis().setLabelStyle("Arial Bold", 8);
    c.yAxis().setLabelStyle("Arial Bold", 8);

    // Set the axis stem to transparent
    c.xAxis().setColors(Chart.Transparent);
    c.yAxis().setColors(Chart.Transparent);

    // Configure x-axis label format
    c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ",
        Chart.StartOfMonthFilter(), "{value|mm}");

    // Add axis title using 10pt Arial Bold Italic font
    c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10);

    // Add a line layer to the chart using a line width of 2 pixels.
    LineLayer layer = c.addLineLayer2();
    layer.setLineWidth(2);

    // Add 3 data series to the line layer
    layer.setXData(timeStamps);
    layer.addDataSet(data0, 0xff3333, "Alpha");
    layer.addDataSet(data1, 0x008800, "Beta");
    layer.addDataSet(data2, 0x3333cc, "Gamma");

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

    // Output Javascript chart model to the browser to suppport tracking cursor
    WebChartViewer1.ChartModel = c.getJsChartModel();
}

</script>

<!DOCTYPE html>
<html>
<head>
    <title>Track Line with Data Labels</title>
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<script type="text/javascript">

//
// Use the window load event to set up the MouseMovePlotArea event handler
//
JsChartViewer.addEventListener(window, 'load', function() {
    var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');

    // Draw track cursor when mouse is moving over plotarea. Hide it when mouse leaves plot area.
    viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove"],
    function(e) {
        this.preventDefault(e);   // Prevent the browser from using touch events for other actions
        trackLineLabel(viewer, viewer.getPlotAreaMouseX());
        viewer.setAutoHide("all", ["MouseOutPlotArea", "TouchEndPlotArea"]);
    });
});

//
// Draw track line with data labels
//
function trackLineLabel(viewer, mouseX)
{
    // Remove all previously drawn tracking object
    viewer.hideObj("all");

    // The chart and its plot area
    var c = viewer.getChart();
    var plotArea = c.getPlotArea();

    // Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
    var xValue = c.getNearestXValue(mouseX);
    var xCoor = c.getXCoor(xValue);

    // Draw a vertical track line at the x-position
    viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");

    // Draw a label on the x-axis to show the track line position
    viewer.showTextBox("xAxisLabel", xCoor, plotArea.getBottomY() + 4, JsChartViewer.Top,
        c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy"),
        "font:bold 11px Arial;color:#FFFFFF;background-color:#000000;padding:0px 3px");

    // Iterate through all layers to draw the data labels
    for (var i = 0; i < c.getLayerCount(); ++i)
    {
        var layer = c.getLayerByZ(i);

        // The data array index of the x-value
        var xIndex = layer.getXIndexOf(xValue);

        // Iterate through all the data sets in the layer
        for (var j = 0; j < layer.getDataSetCount(); ++j)
        {
            var dataSet = layer.getDataSetByZ(j);

            // Get the color and position of the data label
            var color = dataSet.getDataColor();
            var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());

            // Draw a track dot with a label next to it for visible data points in the plot area
            if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) &&
                (color != null))
            {
                viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
                    viewer.htmlRect(7, 7, color));

                viewer.showTextBox("dataLabel" + i + "_" + j, xCoor + 5, yCoor, JsChartViewer.Left,
                    dataSet.getValue(xIndex).toPrecision(4), "padding:0px 3px;font:bold 11px Arial;" +
                    "background-color:" + color + ";color:#FFFFFF;-webkit-text-size-adjust:100%;");
            }
        }
    }
}

</script>
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Track Line with Data Labels
</div>
<hr style="border:solid 1px #000080" />
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
    <a href="viewsource.aspx?file=<%=Request["SCRIPT_NAME"]%>">View Source Code</a>
</div>
<!-- ****** Here is the chart image ****** -->
<chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\tracklabel.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" %>

<script runat="server">

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

    ' Data for the chart as 3 random data series
    Dim r As RanSeries = New RanSeries(127)
    Dim data0() As Double = r.getSeries(100, 100, -15, 15)
    Dim data1() As Double = r.getSeries(100, 150, -15, 15)
    Dim data2() As Double = r.getSeries(100, 200, -15, 15)
    Dim timeStamps() As Date = r.getDateSeries(100, DateSerial(2011, 1, 1), 86400)

    ' Create a XYChart object of size 640 x 400 pixels
    Dim c As XYChart = New XYChart(640, 400)

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

    ' Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90 pixels
    ' less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky blue (a0c0ff)
    ' as background. Set border to transparent and grid lines to white (ffffff).
    c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0, _
        c.getHeight() - 35, &Hf0f6ff, &Ha0c0ff), -1, Chart.Transparent, &Hffffff, &Hffffff)

    ' Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
    ' background and border color to Transparent.
    c.addLegend(50, 25, False, "Arial Bold", 10).setBackground(Chart.Transparent)

    ' Set axis label style to 8pt Arial Bold
    c.xAxis().setLabelStyle("Arial Bold", 8)
    c.yAxis().setLabelStyle("Arial Bold", 8)

    ' Set the axis stem to transparent
    c.xAxis().setColors(Chart.Transparent)
    c.yAxis().setColors(Chart.Transparent)

    ' Configure x-axis label format
    c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ", _
        Chart.StartOfMonthFilter(), "{value|mm}")

    ' Add axis title using 10pt Arial Bold Italic font
    c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10)

    ' Add a line layer to the chart using a line width of 2 pixels.
    Dim layer As LineLayer = c.addLineLayer2()
    layer.setLineWidth(2)

    ' Add 3 data series to the line layer
    layer.setXData(timeStamps)
    layer.addDataSet(data0, &Hff3333, "Alpha")
    layer.addDataSet(data1, &H008800, "Beta")
    layer.addDataSet(data2, &H3333cc, "Gamma")

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

    ' Output Javascript chart model to the browser to suppport tracking cursor
    WebChartViewer1.ChartModel = c.getJsChartModel()

End Sub

</script>

<!DOCTYPE html>
<html>
<head>
    <title>Track Line with Data Labels</title>
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
<script type="text/javascript">

//
// Use the window load event to set up the MouseMovePlotArea event handler
//
JsChartViewer.addEventListener(window, 'load', function() {
    var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');

    // Draw track cursor when mouse is moving over plotarea. Hide it when mouse leaves plot area.
    viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove"],
    function(e) {
        this.preventDefault(e);   // Prevent the browser from using touch events for other actions
        trackLineLabel(viewer, viewer.getPlotAreaMouseX());
        viewer.setAutoHide("all", ["MouseOutPlotArea", "TouchEndPlotArea"]);
    });
});

//
// Draw track line with data labels
//
function trackLineLabel(viewer, mouseX)
{
    // Remove all previously drawn tracking object
    viewer.hideObj("all");

    // The chart and its plot area
    var c = viewer.getChart();
    var plotArea = c.getPlotArea();

    // Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
    var xValue = c.getNearestXValue(mouseX);
    var xCoor = c.getXCoor(xValue);

    // Draw a vertical track line at the x-position
    viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");

    // Draw a label on the x-axis to show the track line position
    viewer.showTextBox("xAxisLabel", xCoor, plotArea.getBottomY() + 4, JsChartViewer.Top,
        c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy"),
        "font:bold 11px Arial;color:#FFFFFF;background-color:#000000;padding:0px 3px");

    // Iterate through all layers to draw the data labels
    for (var i = 0; i < c.getLayerCount(); ++i)
    {
        var layer = c.getLayerByZ(i);

        // The data array index of the x-value
        var xIndex = layer.getXIndexOf(xValue);

        // Iterate through all the data sets in the layer
        for (var j = 0; j < layer.getDataSetCount(); ++j)
        {
            var dataSet = layer.getDataSetByZ(j);

            // Get the color and position of the data label
            var color = dataSet.getDataColor();
            var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());

            // Draw a track dot with a label next to it for visible data points in the plot area
            if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) &&
                (color != null))
            {
                viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
                    viewer.htmlRect(7, 7, color));

                viewer.showTextBox("dataLabel" + i + "_" + j, xCoor + 5, yCoor, JsChartViewer.Left,
                    dataSet.getValue(xIndex).toPrecision(4), "padding:0px 3px;font:bold 11px Arial;" +
                    "background-color:" + color + ";color:#FFFFFF;-webkit-text-size-adjust:100%;");
            }
        }
    }
}

</script>
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Track Line with Data Labels
</div>
<hr style="border:solid 1px #000080" />
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
    <a href="viewsource.aspx?file=<%=Request("SCRIPT_NAME")%>">View Source Code</a>
</div>
<!-- ****** Here is the chart image ****** -->
<chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\TracklabelController.cs

using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class TracklabelController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View();
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // Data for the chart as 3 random data series
            RanSeries r = new RanSeries(127);
            double[] data0 = r.getSeries(100, 100, -15, 15);
            double[] data1 = r.getSeries(100, 150, -15, 15);
            double[] data2 = r.getSeries(100, 200, -15, 15);
            DateTime[] timeStamps = r.getDateSeries(100, new DateTime(2011, 1, 1), 86400);

            // Create a XYChart object of size 640 x 400 pixels
            XYChart c = new XYChart(640, 400);

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

            // Set the plotarea at (50, 55) with width 70 pixels less than chart width, and height 90
            // pixels less than chart height. Use a vertical gradient from light blue (f0f6ff) to sky
            // blue (a0c0ff) as background. Set border to transparent and grid lines to white (ffffff).
            c.setPlotArea(50, 55, c.getWidth() - 70, c.getHeight() - 90, c.linearGradientColor(0, 55, 0,
                c.getHeight() - 35, 0xf0f6ff, 0xa0c0ff), -1, Chart.Transparent, 0xffffff, 0xffffff);

            // Add a legend box at (50, 25) using horizontal layout. Use 10pt Arial Bold as font. Set the
            // background and border color to Transparent.
            c.addLegend(50, 25, false, "Arial Bold", 10).setBackground(Chart.Transparent);

            // Set axis label style to 8pt Arial Bold
            c.xAxis().setLabelStyle("Arial Bold", 8);
            c.yAxis().setLabelStyle("Arial Bold", 8);

            // Set the axis stem to transparent
            c.xAxis().setColors(Chart.Transparent);
            c.yAxis().setColors(Chart.Transparent);

            // Configure x-axis label format
            c.xAxis().setMultiFormat(Chart.StartOfYearFilter(), "{value|mm/yyyy} ",
                Chart.StartOfMonthFilter(), "{value|mm}");

            // Add axis title using 10pt Arial Bold Italic font
            c.yAxis().setTitle("USD millions", "Arial Bold Italic", 10);

            // Add a line layer to the chart using a line width of 2 pixels.
            LineLayer layer = c.addLineLayer2();
            layer.setLineWidth(2);

            // Add 3 data series to the line layer
            layer.setXData(timeStamps);
            layer.addDataSet(data0, 0xff3333, "Alpha");
            layer.addDataSet(data1, 0x008800, "Beta");
            layer.addDataSet(data2, 0x3333cc, "Gamma");

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

            // Output Javascript chart model to the browser to suppport tracking cursor
            viewer.ChartModel = c.getJsChartModel();
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Tracklabel\Index.cshtml

@{ Layout = null; }

<!DOCTYPE html>
<html>
<head>
    <title>Track Line with Data Labels</title>
    @Scripts.Render("~/Scripts/cdjcv.js")
</head>
<body style="margin:5px 0px 0px 5px">
<script type="text/javascript">

//
// Use the window load event to set up the MouseMovePlotArea event handler
//
JsChartViewer.addEventListener(window, 'load', function() {
    var viewer = JsChartViewer.get('@ViewBag.Viewer.ID');

    // Draw track cursor when mouse is moving over plotarea. Hide it when mouse leaves plot area.
    viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove"],
    function(e) {
        this.preventDefault(e);   // Prevent the browser from using touch events for other actions
        trackLineLabel(viewer, viewer.getPlotAreaMouseX());
        viewer.setAutoHide("all", ["MouseOutPlotArea", "TouchEndPlotArea"]);
    });
});

//
// Draw track line with data labels
//
function trackLineLabel(viewer, mouseX)
{
    // Remove all previously drawn tracking object
    viewer.hideObj("all");

    // The chart and its plot area
    var c = viewer.getChart();
    var plotArea = c.getPlotArea();

    // Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
    var xValue = c.getNearestXValue(mouseX);
    var xCoor = c.getXCoor(xValue);

    // Draw a vertical track line at the x-position
    viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");

    // Draw a label on the x-axis to show the track line position
    viewer.showTextBox("xAxisLabel", xCoor, plotArea.getBottomY() + 4, JsChartViewer.Top,
        c.xAxis().getFormattedLabel(xValue, "mmm dd, yyyy"),
        "font:bold 11px Arial;color:#FFFFFF;background-color:#000000;padding:0px 3px");

    // Iterate through all layers to draw the data labels
    for (var i = 0; i < c.getLayerCount(); ++i)
    {
        var layer = c.getLayerByZ(i);

        // The data array index of the x-value
        var xIndex = layer.getXIndexOf(xValue);

        // Iterate through all the data sets in the layer
        for (var j = 0; j < layer.getDataSetCount(); ++j)
        {
            var dataSet = layer.getDataSetByZ(j);

            // Get the color and position of the data label
            var color = dataSet.getDataColor();
            var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());

            // Draw a track dot with a label next to it for visible data points in the plot area
            if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()) &&
                (color != null))
            {
                viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
                    viewer.htmlRect(7, 7, color));

                viewer.showTextBox("dataLabel" + i + "_" + j, xCoor + 5, yCoor, JsChartViewer.Left,
                    dataSet.getValue(xIndex).toPrecision(4), "padding:0px 3px;font:bold 11px Arial;" +
                    "background-color:" + color + ";color:#FFFFFF;-webkit-text-size-adjust:100%;");
            }
        }
    }
}

</script>
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Track Line with Data Labels
</div>
<hr style="border:solid 1px #000080" />
<!-- ****** Here is the chart image ****** -->
@Html.Raw(ViewBag.Viewer.RenderHTML())
</body>
</html>