Simple Real-Time Chart (Web)

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

//
// Draw the chart
//
private void drawChart(WebChartViewer viewer)
{
    //
    // Data to draw the chart. In this demo, the data buffer will be filled by a random data
    // generator. In real life, the data is probably stored in a buffer (eg. a database table, a
    // text file, or some global memory) and updated by other means.
    //

    // We use a data buffer to emulate the last 240 samples.
    int sampleSize = 240;
    double[] dataSeries1 = new double[sampleSize];
    double[] dataSeries2 = new double[sampleSize];
    double[] dataSeries3 = new double[sampleSize];
    DateTime[] timeStamps = new DateTime[sampleSize];

    // Our pseudo random number generator
    DateTime firstDate = DateTime.Now.AddSeconds(-timeStamps.Length);
    for(int i = 0; i < timeStamps.Length; ++i) {
        timeStamps[i] = firstDate.AddSeconds(i);
        double p = timeStamps[i].Ticks / 10000000;
        dataSeries1[i] = Math.Cos(p * 2.1) * 10 + 1 / (Math.Cos(p) * Math.Cos(p) + 0.01) + 20;
        dataSeries2[i] = 100 * Math.Sin(p / 27.7) * Math.Sin(p / 10.1) + 150;
        dataSeries3[i] = 100 * Math.Cos(p / 6.7) * Math.Cos(p / 11.9) + 150;
    }

    // Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4) background, black
    // (000000) border, 1 pixel raised effect, and with a rounded frame.
    XYChart c = new XYChart(600, 270, 0xf4f4f4, 0x000000, 0);
    c.setRoundedFrame();

    // Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff) background.
    // Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set
    // clipping mode to clip the data lines to the plot area.
    c.setPlotArea(55, 62, 520, 175, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
    c.setClipping();

    // Add a title to the chart using 15pt Times New Roman Bold Italic font, with a light grey
    // (dddddd) background, black (000000) border, and a glass like raised effect.
    c.addTitle("Field Intensity at Observation Satellite", "Times New Roman Bold Italic", 15
        ).setBackground(0xdddddd, 0x000000, Chart.glassEffect());

    // Add a legend box at the top of the plot area with 9pt Arial Bold font. We set the legend box
    // to the same width as the plot area and use grid layout (as opposed to flow or top/down
    // layout). This distributes the 3 legend icons evenly on top of the plot area.
    LegendBox b = c.addLegend2(55, 33, 3, "Arial Bold", 9);
    b.setBackground(Chart.Transparent, Chart.Transparent);
    b.setWidth(520);

    // Configure the y-axis with a 10pt Arial Bold axis title
    c.yAxis().setTitle("Intensity (V/m)", "Arial Bold", 10);

    // Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15 pixels
    // between minor ticks. This shows more minor grid lines on the chart.
    c.xAxis().setTickDensity(75, 15);

    // Set the axes width to 2 pixels
    c.xAxis().setWidth(2);
    c.yAxis().setWidth(2);

    // Set the x-axis label format
    c.xAxis().setLabelFormat("{value|hh:nn:ss}");

    // Create a line layer to plot the lines
    LineLayer layer = c.addLineLayer2();

    // The x-coordinates are the timeStamps.
    layer.setXData(timeStamps);

    // The 3 data series are used to draw 3 lines. Here we put the latest data values as part of the
    // data set name, so you can see them updated in the legend box.
    layer.addDataSet(dataSeries1, 0xff0000, c.formatValue(dataSeries1[dataSeries1.Length - 1],
        "Alpha: <*bgColor=FFCCCC*> {value|2} "));
    layer.addDataSet(dataSeries2, 0x00cc00, c.formatValue(dataSeries2[dataSeries2.Length - 1],
        "Beta: <*bgColor=CCFFCC*> {value|2} "));
    layer.addDataSet(dataSeries3, 0x0000ff, c.formatValue(dataSeries3[dataSeries3.Length - 1],
        "Gamma: <*bgColor=CCCCFF*> {value|2} "));

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

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // Draw chart using the most update data
    drawChart(WebChartViewer1);

    // If is streaming request, output the chart immediately and terminate the page
    if (WebChartViewer.IsStreamRequest(Page)) {
        WebChartViewer1.StreamChart();
    }
}

</script>

<!DOCTYPE html>
<html>
<head>
    <title>Simple Real-Time Chart</title>
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:0px">
<table cellspacing="0" cellpadding="0" border="0">
    <tr>
        <td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
            <a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
                Advanced Software Engineering
            </a>
        </td>
    </tr>
    <tr valign="top">
        <td style="width:130px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
            <br />
            <br />
            <div style="font:12px Verdana; padding:10px;">
                <b>Update Period</b><br />
                <select id="UpdatePeriod" style="width:110px">
                    <option value="5">5</option>
                    <option value="10" selected="selected">10</option>
                    <option value="20">20</option>
                    <option value="30">30</option>
                    <option value="60">60</option>
                </select>
                <br /><br /><br />
                <b>Time Remaining</b><br />
                <div style="width:108px; border:#888888 1px inset;">
                    <div style="margin:3px" id="TimeRemaining">0</div>
                </div>
            </div>
        </td>
        <td>
            <div style="font: bold 20pt Arial; margin:5px 0px 0px 5px;">
                Simple Real-Time Chart
            </div>
            <hr style="border:solid 1px #000080" />
            <div style="padding:0px 5px 5px 10px">
                <!-- ****** Here is the chart image ****** -->
                <chart:WebChartViewer id="WebChartViewer1" runat="server" />
            </div>
        </td>
    </tr>
</table>
<script type="text/javascript">

//
// Executes once every second to update the countdown display. Updates the chart when the countdown reaches 0.
//
function timerTick()
{
    // Get the update period and the time left
    var updatePeriod = parseInt(document.getElementById("UpdatePeriod").value);
    var timeLeft = Math.min(parseInt(document.getElementById("TimeRemaining").innerHTML), updatePeriod) - 1;

    if (timeLeft == 0)
        // Can update the chart now
        JsChartViewer.get('<%=WebChartViewer1.ClientID%>').streamUpdate();
    else if (timeLeft < 0)
        // Reset the update period
        timeLeft += updatePeriod;

    // Update the countdown display
    document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);

</script>
</body>
</html>

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

'
' Draw the chart
'
Private Sub drawChart(viewer As WebChartViewer)

    '
    ' Data to draw the chart. In this demo, the data buffer will be filled by a random data
    ' generator. In real life, the data is probably stored in a buffer (eg. a database table, a text
    ' file, or some global memory) and updated by other means.
    '

    ' We use a data buffer to emulate the last 240 samples.
    Dim sampleSize As Integer = 240
    Dim dataSeries1(sampleSize - 1) As Double
    Dim dataSeries2(sampleSize - 1) As Double
    Dim dataSeries3(sampleSize - 1) As Double
    Dim timeStamps(sampleSize - 1) As Date

    ' Our pseudo random number generator
    Dim firstDate As Date = DateTime.Now.AddSeconds(-timeStamps.Length)
    For i As Integer = 0 To UBound(timeStamps)
        timeStamps(i) = firstDate.AddSeconds(i)
        Dim p As Double = timeStamps(i).Ticks / 10000000
        dataSeries1(i) = Math.Cos(p * 2.1) * 10 + 1 / (Math.Cos(p) * Math.Cos(p) + 0.01) + 20
        dataSeries2(i) = 100 * Math.Sin(p / 27.7) * Math.Sin(p / 10.1) + 150
        dataSeries3(i) = 100 * Math.Cos(p / 6.7) * Math.Cos(p / 11.9) + 150
    Next

    ' Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4) background, black
    ' (000000) border, 1 pixel raised effect, and with a rounded frame.
    Dim c As XYChart = New XYChart(600, 270, &Hf4f4f4, &H000000, 0)
    c.setRoundedFrame()

    ' Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff) background.
    ' Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set
    ' clipping mode to clip the data lines to the plot area.
    c.setPlotArea(55, 62, 520, 175, &Hffffff, -1, -1, &Hcccccc, &Hcccccc)
    c.setClipping()

    ' Add a title to the chart using 15pt Times New Roman Bold Italic font, with a light grey
    ' (dddddd) background, black (000000) border, and a glass like raised effect.
    c.addTitle("Field Intensity at Observation Satellite", "Times New Roman Bold Italic", 15 _
        ).setBackground(&Hdddddd, &H000000, Chart.glassEffect())

    ' Add a legend box at the top of the plot area with 9pt Arial Bold font. We set the legend box
    ' to the same width as the plot area and use grid layout (as opposed to flow or top/down
    ' layout). This distributes the 3 legend icons evenly on top of the plot area.
    Dim b As LegendBox = c.addLegend2(55, 33, 3, "Arial Bold", 9)
    b.setBackground(Chart.Transparent, Chart.Transparent)
    b.setWidth(520)

    ' Configure the y-axis with a 10pt Arial Bold axis title
    c.yAxis().setTitle("Intensity (V/m)", "Arial Bold", 10)

    ' Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15 pixels
    ' between minor ticks. This shows more minor grid lines on the chart.
    c.xAxis().setTickDensity(75, 15)

    ' Set the axes width to 2 pixels
    c.xAxis().setWidth(2)
    c.yAxis().setWidth(2)

    ' Set the x-axis label format
    c.xAxis().setLabelFormat("{value|hh:nn:ss}")

    ' Create a line layer to plot the lines
    Dim layer As LineLayer = c.addLineLayer2()

    ' The x-coordinates are the timeStamps.
    layer.setXData(timeStamps)

    ' The 3 data series are used to draw 3 lines. Here we put the latest data values as part of the
    ' data set name, so you can see them updated in the legend box.
    layer.addDataSet(dataSeries1, &Hff0000, c.formatValue(dataSeries1(UBound(dataSeries1)), _
        "Alpha: <*bgColor=FFCCCC*> {value|2} "))
    layer.addDataSet(dataSeries2, &H00cc00, c.formatValue(dataSeries2(UBound(dataSeries2)), _
        "Beta: <*bgColor=CCFFCC*> {value|2} "))
    layer.addDataSet(dataSeries3, &H0000ff, c.formatValue(dataSeries3(UBound(dataSeries3)), _
        "Gamma: <*bgColor=CCCCFF*> {value|2} "))

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

End Sub

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

    ' Draw chart using the most update data
    drawChart(WebChartViewer1)

    ' If is streaming request, output the chart immediately and terminate the page
    If WebChartViewer.IsStreamRequest(Page) Then
        WebChartViewer1.StreamChart()
    End If

End Sub

</script>

<!DOCTYPE html>
<html>
<head>
    <title>Simple Real-Time Chart</title>
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:0px">
<table cellspacing="0" cellpadding="0" border="0">
    <tr>
        <td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
            <a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
                Advanced Software Engineering
            </a>
        </td>
    </tr>
    <tr valign="top">
        <td style="width:130px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
            <br />
            <br />
            <div style="font:12px Verdana; padding:10px;">
                <b>Update Period</b><br />
                <select id="UpdatePeriod" style="width:110px">
                    <option value="5">5</option>
                    <option value="10" selected="selected">10</option>
                    <option value="20">20</option>
                    <option value="30">30</option>
                    <option value="60">60</option>
                </select>
                <br /><br /><br />
                <b>Time Remaining</b><br />
                <div style="width:108px; border:#888888 1px inset;">
                    <div style="margin:3px" id="TimeRemaining">0</div>
                </div>
            </div>
        </td>
        <td>
            <div style="font: bold 20pt Arial; margin:5px 0px 0px 5px;">
                Simple Real-Time Chart
            </div>
            <hr style="border:solid 1px #000080" />
            <div style="padding:0px 5px 5px 10px">
                <!-- ****** Here is the chart image ****** -->
                <chart:WebChartViewer id="WebChartViewer1" runat="server" />
            </div>
        </td>
    </tr>
</table>
<script type="text/javascript">

//
// Executes once every second to update the countdown display. Updates the chart when the countdown reaches 0.
//
function timerTick()
{
    // Get the update period and the time left
    var updatePeriod = parseInt(document.getElementById("UpdatePeriod").value);
    var timeLeft = Math.min(parseInt(document.getElementById("TimeRemaining").innerHTML), updatePeriod) - 1;

    if (timeLeft == 0)
        // Can update the chart now
        JsChartViewer.get('<%=WebChartViewer1.ClientID%>').streamUpdate();
    else if (timeLeft < 0)
        // Reset the update period
        timeLeft += updatePeriod;

    // Update the countdown display
    document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);

</script>
</body>
</html>

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

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

namespace NetMvcCharts.Controllers
{
    public class RealtimedemoController : Controller
    {
        //
        // Draw the chart
        //
        private void drawChart(RazorChartViewer viewer)
        {
            //
            // Data to draw the chart. In this demo, the data buffer will be filled by a random data
            // generator. In real life, the data is probably stored in a buffer (eg. a database table, a
            // text file, or some global memory) and updated by other means.
            //

            // We use a data buffer to emulate the last 240 samples.
            int sampleSize = 240;
            double[] dataSeries1 = new double[sampleSize];
            double[] dataSeries2 = new double[sampleSize];
            double[] dataSeries3 = new double[sampleSize];
            DateTime[] timeStamps = new DateTime[sampleSize];

            // Our pseudo random number generator
            DateTime firstDate = DateTime.Now.AddSeconds(-timeStamps.Length);
            for(int i = 0; i < timeStamps.Length; ++i) {
                timeStamps[i] = firstDate.AddSeconds(i);
                double p = timeStamps[i].Ticks / 10000000;
                dataSeries1[i] = Math.Cos(p * 2.1) * 10 + 1 / (Math.Cos(p) * Math.Cos(p) + 0.01) + 20;
                dataSeries2[i] = 100 * Math.Sin(p / 27.7) * Math.Sin(p / 10.1) + 150;
                dataSeries3[i] = 100 * Math.Cos(p / 6.7) * Math.Cos(p / 11.9) + 150;
            }

            // Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4) background,
            // black (000000) border, 1 pixel raised effect, and with a rounded frame.
            XYChart c = new XYChart(600, 270, 0xf4f4f4, 0x000000, 0);
            c.setRoundedFrame();

            // Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff) background.
            // Enable both horizontal and vertical grids by setting their colors to grey (cccccc). Set
            // clipping mode to clip the data lines to the plot area.
            c.setPlotArea(55, 62, 520, 175, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
            c.setClipping();

            // Add a title to the chart using 15pt Times New Roman Bold Italic font, with a light grey
            // (dddddd) background, black (000000) border, and a glass like raised effect.
            c.addTitle("Field Intensity at Observation Satellite", "Times New Roman Bold Italic", 15
                ).setBackground(0xdddddd, 0x000000, Chart.glassEffect());

            // Add a legend box at the top of the plot area with 9pt Arial Bold font. We set the legend
            // box to the same width as the plot area and use grid layout (as opposed to flow or top/down
            // layout). This distributes the 3 legend icons evenly on top of the plot area.
            LegendBox b = c.addLegend2(55, 33, 3, "Arial Bold", 9);
            b.setBackground(Chart.Transparent, Chart.Transparent);
            b.setWidth(520);

            // Configure the y-axis with a 10pt Arial Bold axis title
            c.yAxis().setTitle("Intensity (V/m)", "Arial Bold", 10);

            // Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15
            // pixels between minor ticks. This shows more minor grid lines on the chart.
            c.xAxis().setTickDensity(75, 15);

            // Set the axes width to 2 pixels
            c.xAxis().setWidth(2);
            c.yAxis().setWidth(2);

            // Set the x-axis label format
            c.xAxis().setLabelFormat("{value|hh:nn:ss}");

            // Create a line layer to plot the lines
            LineLayer layer = c.addLineLayer2();

            // The x-coordinates are the timeStamps.
            layer.setXData(timeStamps);

            // The 3 data series are used to draw 3 lines. Here we put the latest data values as part of
            // the data set name, so you can see them updated in the legend box.
            layer.addDataSet(dataSeries1, 0xff0000, c.formatValue(dataSeries1[dataSeries1.Length - 1],
                "Alpha: <*bgColor=FFCCCC*> {value|2} "));
            layer.addDataSet(dataSeries2, 0x00cc00, c.formatValue(dataSeries2[dataSeries2.Length - 1],
                "Beta: <*bgColor=CCFFCC*> {value|2} "));
            layer.addDataSet(dataSeries3, 0x0000ff, c.formatValue(dataSeries3[dataSeries3.Length - 1],
                "Gamma: <*bgColor=CCCCFF*> {value|2} "));

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

        public ActionResult Index()
        {
            RazorChartViewer viewer = ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1");

            // Draw chart using the most update data
            drawChart(viewer);

            // If is streaming request, output the chart only
            if (RazorChartViewer.IsStreamRequest(Request)) {
                return File(viewer.StreamChart(), Response.ContentType);
            }

            return View();
        }
    }
}

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

@{ Layout = null; }

<!DOCTYPE html>
<html>
<head>
    <title>Simple Real-Time Chart</title>
    @Scripts.Render("~/Scripts/cdjcv.js")
</head>
<body style="margin:0px">
<table cellspacing="0" cellpadding="0" border="0">
    <tr>
        <td align="right" colspan="2" style="background:#000088; color:#ffff00; padding:0px 4px 2px 0px;">
            <a style="color:#FFFF00; font:italic bold 10pt Arial; text-decoration:none" href="http://www.advsofteng.com/">
                Advanced Software Engineering
            </a>
        </td>
    </tr>
    <tr valign="top">
        <td style="width:130px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
            <br />
            <br />
            <div style="font:12px Verdana; padding:10px;">
                <b>Update Period</b><br />
                <select id="UpdatePeriod" style="width:110px">
                    <option value="5">5</option>
                    <option value="10" selected="selected">10</option>
                    <option value="20">20</option>
                    <option value="30">30</option>
                    <option value="60">60</option>
                </select>
                <br /><br /><br />
                <b>Time Remaining</b><br />
                <div style="width:108px; border:#888888 1px inset;">
                    <div style="margin:3px" id="TimeRemaining">0</div>
                </div>
            </div>
        </td>
        <td>
            <div style="font: bold 20pt Arial; margin:5px 0px 0px 5px;">
                Simple Real-Time Chart
            </div>
            <hr style="border:solid 1px #000080" />
            <div style="padding:0px 5px 5px 10px">
                <!-- ****** Here is the chart image ****** -->
                @Html.Raw(ViewBag.Viewer.RenderHTML())
            </div>
        </td>
    </tr>
</table>
<script type="text/javascript">

//
// Executes once every second to update the countdown display. Updates the chart when the countdown reaches 0.
//
function timerTick()
{
    // Get the update period and the time left
    var updatePeriod = parseInt(document.getElementById("UpdatePeriod").value);
    var timeLeft = Math.min(parseInt(document.getElementById("TimeRemaining").innerHTML), updatePeriod) - 1;

    if (timeLeft == 0)
        // Can update the chart now
        JsChartViewer.get('@ViewBag.Viewer.ID').streamUpdate();
    else if (timeLeft < 0)
        // Reset the update period
        timeLeft += updatePeriod;

    // Update the countdown display
    document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);

</script>
</body>
</html>