[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\realtimetrack.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, 57) and of size 520 x 185 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, 57, 520, 185, 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());
// 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, "Alpha");
layer.addDataSet(dataSeries2, 0x00cc00, "Beta");
layer.addDataSet(dataSeries3, 0x0000ff, "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();
}
//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
//
// This script handles both the full page request, as well as the subsequent partial updates
// (AJAX chart updates). We need to determine the type of request first before we processing it.
//
if (WebChartViewer.IsPartialUpdateRequest(Page)) {
// Is a partial update request.
// The .NET platform will not restore the states of the controls before or during Page_Load,
// so we need to restore the state ourselves
WebChartViewer1.LoadViewerState();
// Draw the chart in partial update mode
drawChart(WebChartViewer1);
// Output the chart immediately and then terminate the page life cycle (PartialUpdateChart
// will cause Page_Load to terminate immediately without running the following code).
WebChartViewer1.PartialUpdateChart();
}
//
// If the code reaches here, it is a full page request.
//
drawChart(WebChartViewer1);
}
</script>
<!DOCTYPE html>
<html>
<head>
<title>Real-Time Chart with Track Line</title>
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:0px">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
// Draw track cursor when mouse is moving over plotarea or if the chart is updated. In the latter case,
// if the mouse is not on the plot area, we will update the legend to show the latest data values.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
// When the chart is being updated, by default, an "Updating" box will pop up. In this example, we
// will disable this box.
viewer.updatingMsg = "";
});
//
// Draw track line with legend
//
function trackLineLegend(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);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
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);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(7, 7, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(7, 7, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "hh:nn:ss") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"width:" + plotArea.getWidth() + "px;font:bold 11px Arial;padding:3px;-webkit-text-size-adjust:100%;");
}
//
// 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%>').partialUpdate();
else if (timeLeft < 0)
// Reset the update period
timeLeft += updatePeriod;
// Update the countdown display
document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);
</script>
<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:150px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
<br />
<br />
<div style="font: 9pt Verdana; padding:10px;">
<b>Update Period</b><br />
<select id="UpdatePeriod" style="width:130px">
<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>
</div>
<div style="font:9pt Verdana; padding:10px;">
<b>Time Remaining</b><br />
<div style="width:128px; 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;">
Real-Time Chart with Track Line
</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>
</body>
</html>
[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\realtimetrack.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, 57) and of size 520 x 185 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, 57, 520, 185, &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())
' 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, "Alpha")
layer.addDataSet(dataSeries2, &H00cc00, "Beta")
layer.addDataSet(dataSeries3, &H0000ff, "Gamma")
' Output the chart
viewer.Image = c.makeWebImage(Chart.SVG)
' Output Javascript chart model to the browser to suppport tracking cursor
WebChartViewer1.ChartModel = c.getJsChartModel()
End Sub
'
' Page Load event handler
'
Private Sub Page_Load(sender As System.Object, e As System.EventArgs)
'
' This script handles both the full page request, as well as the subsequent partial updates
' (AJAX chart updates). We need to determine the type of request first before we processing it.
'
If WebChartViewer.IsPartialUpdateRequest(Page) Then
' Is a partial update request.
' The .NET platform will not restore the states of the controls before or during Page_Load,
' so we need to restore the state ourselves
WebChartViewer1.LoadViewerState()
' Draw the chart in partial update mode
drawChart(WebChartViewer1)
' Output the chart immediately and then terminate the page life cycle (PartialUpdateChart
' will cause Page_Load to terminate immediately without running the following code).
WebChartViewer1.PartialUpdateChart()
End If
'
' If the code reaches here, it is a full page request.
'
drawChart(WebChartViewer1)
End Sub
</script>
<!DOCTYPE html>
<html>
<head>
<title>Real-Time Chart with Track Line</title>
<script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:0px">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
var viewer = JsChartViewer.get('<%=WebChartViewer1.ClientID%>');
// Draw track cursor when mouse is moving over plotarea or if the chart is updated. In the latter case,
// if the mouse is not on the plot area, we will update the legend to show the latest data values.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
// When the chart is being updated, by default, an "Updating" box will pop up. In this example, we
// will disable this box.
viewer.updatingMsg = "";
});
//
// Draw track line with legend
//
function trackLineLegend(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);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
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);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(7, 7, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(7, 7, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "hh:nn:ss") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"width:" + plotArea.getWidth() + "px;font:bold 11px Arial;padding:3px;-webkit-text-size-adjust:100%;");
}
//
// 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%>').partialUpdate();
else if (timeLeft < 0)
// Reset the update period
timeLeft += updatePeriod;
// Update the countdown display
document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);
</script>
<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:150px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
<br />
<br />
<div style="font: 9pt Verdana; padding:10px;">
<b>Update Period</b><br />
<select id="UpdatePeriod" style="width:130px">
<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>
</div>
<div style="font:9pt Verdana; padding:10px;">
<b>Time Remaining</b><br />
<div style="width:128px; 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;">
Real-Time Chart with Track Line
</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>
</body>
</html>
[ASP.NET MVC - Controller] NetMvcCharts\Controllers\RealtimetrackController.cs
using System;
using System.Web.Mvc;
using ChartDirector;
namespace NetMvcCharts.Controllers
{
public class RealtimetrackController : 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, 57) and of size 520 x 185 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, 57, 520, 185, 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());
// 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, "Alpha");
layer.addDataSet(dataSeries2, 0x00cc00, "Beta");
layer.addDataSet(dataSeries3, 0x0000ff, "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();
}
public ActionResult Index()
{
RazorChartViewer viewer = ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1");
//
// This script handles both the full page request, as well as the subsequent partial updates
// (AJAX chart updates). We need to determine the type of request first before we processing
// it.
//
if (RazorChartViewer.IsPartialUpdateRequest(Request)) {
// Is a partial update request.
drawChart(viewer);
return Content(viewer.PartialUpdateChart());
}
//
// If the code reaches here, it is a full page request.
//
drawChart(viewer);
return View();
}
}
}
[ASP.NET MVC - View] NetMvcCharts\Views\Realtimetrack\Index.cshtml
@{ Layout = null; }
<!DOCTYPE html>
<html>
<head>
<title>Real-Time Chart with Track Line</title>
@Scripts.Render("~/Scripts/cdjcv.js")
</head>
<body style="margin:0px">
<script type="text/javascript">
//
// Execute the following initialization code after the web page is loaded
//
JsChartViewer.addEventListener(window, 'load', function() {
var viewer = JsChartViewer.get('@ViewBag.Viewer.ID');
// Draw track cursor when mouse is moving over plotarea or if the chart is updated. In the latter case,
// if the mouse is not on the plot area, we will update the legend to show the latest data values.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
trackLineLegend(viewer, viewer.getPlotAreaMouseX());
});
// When the chart is being updated, by default, an "Updating" box will pop up. In this example, we
// will disable this box.
viewer.updatingMsg = "";
});
//
// Draw track line with legend
//
function trackLineLegend(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);
if (xCoor == null)
return;
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine", xCoor, plotArea.getTopY(), plotArea.getBottomY(), "black 1px dotted");
// Array to hold the legend entries
var legendEntries = [];
// Iterate through all layers to build the legend array
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);
// We are only interested in visible data sets with names, as they are required for legend entries.
var dataName = dataSet.getDataName();
var color = dataSet.getDataColor();
if ((!dataName) || (color == null))
continue;
// Build the legend entry, consist of a colored square box, the name and the data value.
var dataValue = dataSet.getValue(xIndex);
legendEntries.push("<nobr>" + viewer.htmlRect(7, 7, color) + " " + dataName + ": " +
((dataValue == null) ? "N/A" : dataValue.toPrecision(4)) + viewer.htmlRect(20, 0) + "</nobr> ");
// Draw a track dot for data points within the plot area
var yCoor = c.getYCoor(dataSet.getPosition(xIndex), dataSet.getUseYAxis());
if ((yCoor != null) && (yCoor >= plotArea.getTopY()) && (yCoor <= plotArea.getBottomY()))
{
viewer.showTextBox("dataPoint" + i + "_" + j, xCoor, yCoor, JsChartViewer.Center,
viewer.htmlRect(7, 7, color));
}
}
}
// Create the legend by joining the legend entries.
var legend = "<nobr>[" + c.xAxis().getFormattedLabel(xValue, "hh:nn:ss") + "]" + viewer.htmlRect(20, 0) +
"</nobr> " + legendEntries.reverse().join("");
// Display the legend on the top of the plot area
viewer.showTextBox("legend", plotArea.getLeftX(), plotArea.getTopY(), JsChartViewer.BottomLeft, legend,
"width:" + plotArea.getWidth() + "px;font:bold 11px Arial;padding:3px;-webkit-text-size-adjust:100%;");
}
//
// 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').partialUpdate();
else if (timeLeft < 0)
// Reset the update period
timeLeft += updatePeriod;
// Update the countdown display
document.getElementById("TimeRemaining").innerHTML = timeLeft;
}
window.setInterval("timerTick()", 1000);
</script>
<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:150px; background:#c0c0ff; border-right:black 1px solid; border-bottom:black 1px solid;">
<br />
<br />
<div style="font: 9pt Verdana; padding:10px;">
<b>Update Period</b><br />
<select id="UpdatePeriod" style="width:130px">
<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>
</div>
<div style="font:9pt Verdana; padding:10px;">
<b>Time Remaining</b><br />
<div style="width:128px; 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;">
Real-Time Chart with Track Line
</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>
</body>
</html>
© 2023 Advanced Software Engineering Limited. All rights reserved.
