[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\realtimemultichart.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 a single chart
//
private XYChart drawXYChart(WebChartViewer viewer, DateTime[] timeStamps, double[] dataSeries,
string name, int color, Axis xAxisScale, bool xAxisVisible)
{
// Only the last chart has an x-axis
int xAxisHeight = 25;
if (!xAxisVisible) {
xAxisHeight = 0;
}
// Create an XYChart object of size 640 x 120 pixels (excluding x-axis height)
XYChart c = new XYChart(640, 120 + xAxisHeight);
// Set the plotarea at (55, 10) with width 85 pixels less than chart width, and height 20 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(55, 10, c.getWidth() - 85, c.getHeight() - 20 - xAxisHeight,
c.linearGradientColor(0, 10, 0, c.getHeight() - 20 - xAxisHeight, 0xf0f6ff, 0xa0c0ff), -1,
Chart.Transparent, 0xffffff, 0xffffff);
// As the data can lie outside the plotarea in a zoomed chart, we need enable clipping.
c.setClipping();
// Add a legend box at (55, 5) using horizontal layout. Use 8pts Arial Bold as font. Set the
// background and border color to Transparent and use line style legend key.
LegendBox b = c.addLegend(55, 5, false, "Arial Bold", 10);
b.setBackground(Chart.Transparent);
b.setLineStyleKey();
// Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
c.yAxis().setLabelStyle("Arial", 10);
// Add axis title using 10pts Arial Bold Italic font
c.yAxis().setTitle(name, "Arial Bold", 10);
//================================================================================
// Add data to chart
//================================================================================
// Add a line layer with the given data, with a line width of 2 pixels.
LineLayer layer = c.addLineLayer();
layer.setLineWidth(2);
layer.setXData(timeStamps);
layer.addDataSet(dataSeries, color, name);
//================================================================================
// Configure axis scale and labelling
//================================================================================
// For the automatic axis labels, set the minimum spacing to 30 pixels for the y axis.
c.yAxis().setTickDensity(30);
if (xAxisScale == null) {
// If xAxisScale is given, then use it to synchronize with other charts.
c.xAxis().copyAxis(xAxisScale);
} else {
// Set the x-axis label format
c.xAxis().setLabelFormat("{value|hh:nn:ss}");
}
// Hide the x-axis if it is not visible.
if (!xAxisVisible) {
c.xAxis().setColors(Chart.Transparent, Chart.Transparent);
}
//================================================================================
// Output the chart
//================================================================================
return c;
}
//
// Draw the MultiChart
//
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;
}
// The MultiChart, initially set to a height 10 pixels as the top margin.
MultiChart m = new MultiChart(640, 10);
// This first chart is responsible for setting up the x-axis scale.
XYChart xyc = drawXYChart(viewer, timeStamps, dataSeries1, "Alpha", 0xff0000, null, false);
Axis xAxisScale = xyc.xAxis();
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// All other charts synchronize their x-axes with that of the first chart.
xyc = drawXYChart(viewer, timeStamps, dataSeries2, "Beta", 0x008800, xAxisScale, false);
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// The last chart displays the x-axis.
xyc = drawXYChart(viewer, timeStamps, dataSeries3, "Gamma", 0x0000ff, xAxisScale, true);
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// Set the combined plot area to be the bounding box of the plot areas of the 3 charts
m.setMainChart(m);
// Output the chart
viewer.Image = m.makeWebImage(Chart.SVG);
// Output Javascript chart model to the browser to suppport tracking cursor
viewer.ChartModel = m.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 MultiChart</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. Hide it when mouse leaves plot area.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
multiTrackLineLabel(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 for a MultiChart
//
function multiTrackLineLabel(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// Use a loop to draw track labels for the XYCharts inside the MultiChart
for (var i = 0; i < viewer.getChartCount(); ++i)
// Only the bottom chart (i == viewer.getChartCount() - 1) needs x-axis label.
xyChartTrackLabel(viewer, mouseX, viewer.getChart(i), i, i == viewer.getChartCount() - 1);
}
//
// Draw xy chart track label
//
function xyChartTrackLabel(viewer, mouseX, c, id, needXAxisLabel)
{
// The plot area
var plotArea = c.getPlotArea();
// The XYChart API object obtains the various coordinates relative to the top-left corner
// of the XYChart. However, it needs to draw the track cursor on the MultiChart. So we need
// to obtain the coordinates of the XYChart top-left corner inside the MultiChart.
var originX = c.getAbsOffsetX();
var originY = c.getAbsOffsetY();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = originX + c.getXCoor(xValue);
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine_" + id, xCoor, originY + plotArea.getTopY(),
originY + plotArea.getBottomY(), "black 1px dotted");
// Only the last chart needs to draw the x-axis label
if (needXAxisLabel)
{
viewer.showTextBox("xAxisLabel_" + id, xCoor, originY + plotArea.getBottomY()
+ 5, JsChartViewer.Top, c.xAxis().getFormattedLabel(xValue, "hh:nn:ss"),
"font:bold 13px 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_" + id + "_" + i + "_" + j, xCoor,
originY + yCoor, JsChartViewer.Center, viewer.htmlRect(7, 7, color));
viewer.showTextBox("dataLabel" + id + "_" + i + "_" + j, xCoor + 5,
originY + yCoor, JsChartViewer.Left, dataSet.getValue(xIndex).toPrecision(4),
"padding:0px 3px;font:bold 13px Arial;background-color:" + color +
";color:#FFFFFF;-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" selected="selected">5</option>
<option value="10">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 MultiChart
</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\realtimemultichart.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 a single chart
'
Private Function drawXYChart(viewer As WebChartViewer, timeStamps As DateTime(), _
dataSeries As Double(), name As String, color As Integer, xAxisScale As Axis, _
xAxisVisible As Boolean) As XYChart
' Only the last chart has an x-axis
Dim xAxisHeight As Integer = 25
If Not xAxisVisible Then
xAxisHeight = 0
End If
' Create an XYChart object of size 640 x 120 pixels (excluding x-axis height)
Dim c As XYChart = New XYChart(640, 120 + xAxisHeight)
' Set the plotarea at (55, 10) with width 85 pixels less than chart width, and height 20 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(55, 10, c.getWidth() - 85, c.getHeight() - 20 - xAxisHeight, _
c.linearGradientColor(0, 10, 0, c.getHeight() - 20 - xAxisHeight, &Hf0f6ff, &Ha0c0ff), -1, _
Chart.Transparent, &Hffffff, &Hffffff)
' As the data can lie outside the plotarea in a zoomed chart, we need enable clipping.
c.setClipping()
' Add a legend box at (55, 5) using horizontal layout. Use 8pts Arial Bold as font. Set the
' background and border color to Transparent and use line style legend key.
Dim b As LegendBox = c.addLegend(55, 5, False, "Arial Bold", 10)
b.setBackground(Chart.Transparent)
b.setLineStyleKey()
' Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent)
c.yAxis().setColors(Chart.Transparent)
c.xAxis().setLabelStyle("Arial", 10)
c.yAxis().setLabelStyle("Arial", 10)
' Add axis title using 10pts Arial Bold Italic font
c.yAxis().setTitle(name, "Arial Bold", 10)
'================================================================================
' Add data to chart
'================================================================================
' Add a line layer with the given data, with a line width of 2 pixels.
Dim layer As LineLayer = c.addLineLayer()
layer.setLineWidth(2)
layer.setXData(timeStamps)
layer.addDataSet(dataSeries, color, name)
'================================================================================
' Configure axis scale and labelling
'================================================================================
' For the automatic axis labels, set the minimum spacing to 30 pixels for the y axis.
c.yAxis().setTickDensity(30)
If xAxisScale Is Nothing Then
' If xAxisScale is given, then use it to synchronize with other charts.
c.xAxis().copyAxis(xAxisScale)
Else
' Set the x-axis label format
c.xAxis().setLabelFormat("{value|hh:nn:ss}")
End If
' Hide the x-axis if it is not visible.
If Not xAxisVisible Then
c.xAxis().setColors(Chart.Transparent, Chart.Transparent)
End If
'================================================================================
' Output the chart
'================================================================================
Return c
End Function
'
' Draw the MultiChart
'
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
' The MultiChart, initially set to a height 10 pixels as the top margin.
Dim m As MultiChart = New MultiChart(640, 10)
' This first chart is responsible for setting up the x-axis scale.
Dim xyc As XYChart = drawXYChart(viewer, timeStamps, dataSeries1, "Alpha", &Hff0000, Nothing, _
False)
Dim xAxisScale As Axis = xyc.xAxis()
' Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc)
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight())
' All other charts synchronize their x-axes with that of the first chart.
xyc = drawXYChart(viewer, timeStamps, dataSeries2, "Beta", &H008800, xAxisScale, False)
' Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc)
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight())
' The last chart displays the x-axis.
xyc = drawXYChart(viewer, timeStamps, dataSeries3, "Gamma", &H0000ff, xAxisScale, True)
' Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc)
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight())
' Set the combined plot area to be the bounding box of the plot areas of the 3 charts
m.setMainChart(m)
' Output the chart
viewer.Image = m.makeWebImage(Chart.SVG)
' Output Javascript chart model to the browser to suppport tracking cursor
WebChartViewer1.ChartModel = m.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 MultiChart</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. Hide it when mouse leaves plot area.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
multiTrackLineLabel(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 for a MultiChart
//
function multiTrackLineLabel(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// Use a loop to draw track labels for the XYCharts inside the MultiChart
for (var i = 0; i < viewer.getChartCount(); ++i)
// Only the bottom chart (i == viewer.getChartCount() - 1) needs x-axis label.
xyChartTrackLabel(viewer, mouseX, viewer.getChart(i), i, i == viewer.getChartCount() - 1);
}
//
// Draw xy chart track label
//
function xyChartTrackLabel(viewer, mouseX, c, id, needXAxisLabel)
{
// The plot area
var plotArea = c.getPlotArea();
// The XYChart API object obtains the various coordinates relative to the top-left corner
// of the XYChart. However, it needs to draw the track cursor on the MultiChart. So we need
// to obtain the coordinates of the XYChart top-left corner inside the MultiChart.
var originX = c.getAbsOffsetX();
var originY = c.getAbsOffsetY();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = originX + c.getXCoor(xValue);
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine_" + id, xCoor, originY + plotArea.getTopY(),
originY + plotArea.getBottomY(), "black 1px dotted");
// Only the last chart needs to draw the x-axis label
if (needXAxisLabel)
{
viewer.showTextBox("xAxisLabel_" + id, xCoor, originY + plotArea.getBottomY()
+ 5, JsChartViewer.Top, c.xAxis().getFormattedLabel(xValue, "hh:nn:ss"),
"font:bold 13px 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_" + id + "_" + i + "_" + j, xCoor,
originY + yCoor, JsChartViewer.Center, viewer.htmlRect(7, 7, color));
viewer.showTextBox("dataLabel" + id + "_" + i + "_" + j, xCoor + 5,
originY + yCoor, JsChartViewer.Left, dataSet.getValue(xIndex).toPrecision(4),
"padding:0px 3px;font:bold 13px Arial;background-color:" + color +
";color:#FFFFFF;-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" selected="selected">5</option>
<option value="10">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 MultiChart
</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\RealtimemultichartController.cs
using System;
using System.Web.Mvc;
using ChartDirector;
namespace NetMvcCharts.Controllers
{
public class RealtimemultichartController : Controller
{
//
// Draw a single chart
//
private XYChart drawXYChart(RazorChartViewer viewer, DateTime[] timeStamps, double[] dataSeries,
string name, int color, Axis xAxisScale, bool xAxisVisible)
{
// Only the last chart has an x-axis
int xAxisHeight = 25;
if (!xAxisVisible) {
xAxisHeight = 0;
}
// Create an XYChart object of size 640 x 120 pixels (excluding x-axis height)
XYChart c = new XYChart(640, 120 + xAxisHeight);
// Set the plotarea at (55, 10) with width 85 pixels less than chart width, and height 20
// 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(55, 10, c.getWidth() - 85, c.getHeight() - 20 - xAxisHeight,
c.linearGradientColor(0, 10, 0, c.getHeight() - 20 - xAxisHeight, 0xf0f6ff, 0xa0c0ff),
-1, Chart.Transparent, 0xffffff, 0xffffff);
// As the data can lie outside the plotarea in a zoomed chart, we need enable clipping.
c.setClipping();
// Add a legend box at (55, 5) using horizontal layout. Use 8pts Arial Bold as font. Set the
// background and border color to Transparent and use line style legend key.
LegendBox b = c.addLegend(55, 5, false, "Arial Bold", 10);
b.setBackground(Chart.Transparent);
b.setLineStyleKey();
// Set the x and y axis stems to transparent and the label font to 10pt Arial
c.xAxis().setColors(Chart.Transparent);
c.yAxis().setColors(Chart.Transparent);
c.xAxis().setLabelStyle("Arial", 10);
c.yAxis().setLabelStyle("Arial", 10);
// Add axis title using 10pts Arial Bold Italic font
c.yAxis().setTitle(name, "Arial Bold", 10);
//================================================================================
// Add data to chart
//================================================================================
// Add a line layer with the given data, with a line width of 2 pixels.
LineLayer layer = c.addLineLayer();
layer.setLineWidth(2);
layer.setXData(timeStamps);
layer.addDataSet(dataSeries, color, name);
//================================================================================
// Configure axis scale and labelling
//================================================================================
// For the automatic axis labels, set the minimum spacing to 30 pixels for the y axis.
c.yAxis().setTickDensity(30);
if (xAxisScale == null) {
// If xAxisScale is given, then use it to synchronize with other charts.
c.xAxis().copyAxis(xAxisScale);
} else {
// Set the x-axis label format
c.xAxis().setLabelFormat("{value|hh:nn:ss}");
}
// Hide the x-axis if it is not visible.
if (!xAxisVisible) {
c.xAxis().setColors(Chart.Transparent, Chart.Transparent);
}
//================================================================================
// Output the chart
//================================================================================
return c;
}
//
// Draw the MultiChart
//
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;
}
// The MultiChart, initially set to a height 10 pixels as the top margin.
MultiChart m = new MultiChart(640, 10);
// This first chart is responsible for setting up the x-axis scale.
XYChart xyc = drawXYChart(viewer, timeStamps, dataSeries1, "Alpha", 0xff0000, null, false);
Axis xAxisScale = xyc.xAxis();
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// All other charts synchronize their x-axes with that of the first chart.
xyc = drawXYChart(viewer, timeStamps, dataSeries2, "Beta", 0x008800, xAxisScale, false);
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// The last chart displays the x-axis.
xyc = drawXYChart(viewer, timeStamps, dataSeries3, "Gamma", 0x0000ff, xAxisScale, true);
// Add the XYChart to the MultiChart and increase the MultiChart height
m.addChart(0, m.getHeight(), xyc);
m.setSize(m.getWidth(), m.getHeight() + xyc.getHeight());
// Set the combined plot area to be the bounding box of the plot areas of the 3 charts
m.setMainChart(m);
// Output the chart
viewer.Image = m.makeWebImage(Chart.SVG);
// Output Javascript chart model to the browser to suppport tracking cursor
viewer.ChartModel = m.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\Realtimemultichart\Index.cshtml
@{ Layout = null; }
<!DOCTYPE html>
<html>
<head>
<title>Real Time MultiChart</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. Hide it when mouse leaves plot area.
viewer.attachHandler(["MouseMovePlotArea", "TouchStartPlotArea", "TouchMovePlotArea", "ChartMove",
"PostUpdate", "Now"], function(e) {
this.preventDefault(e); // Prevent the browser from using touch events for other actions
multiTrackLineLabel(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 for a MultiChart
//
function multiTrackLineLabel(viewer, mouseX)
{
// Remove all previously drawn tracking object
viewer.hideObj("all");
// Use a loop to draw track labels for the XYCharts inside the MultiChart
for (var i = 0; i < viewer.getChartCount(); ++i)
// Only the bottom chart (i == viewer.getChartCount() - 1) needs x-axis label.
xyChartTrackLabel(viewer, mouseX, viewer.getChart(i), i, i == viewer.getChartCount() - 1);
}
//
// Draw xy chart track label
//
function xyChartTrackLabel(viewer, mouseX, c, id, needXAxisLabel)
{
// The plot area
var plotArea = c.getPlotArea();
// The XYChart API object obtains the various coordinates relative to the top-left corner
// of the XYChart. However, it needs to draw the track cursor on the MultiChart. So we need
// to obtain the coordinates of the XYChart top-left corner inside the MultiChart.
var originX = c.getAbsOffsetX();
var originY = c.getAbsOffsetY();
// Get the data x-value that is nearest to the mouse, and find its pixel coordinate.
var xValue = c.getNearestXValue(mouseX);
var xCoor = originX + c.getXCoor(xValue);
// Draw a vertical track line at the x-position
viewer.drawVLine("trackLine_" + id, xCoor, originY + plotArea.getTopY(),
originY + plotArea.getBottomY(), "black 1px dotted");
// Only the last chart needs to draw the x-axis label
if (needXAxisLabel)
{
viewer.showTextBox("xAxisLabel_" + id, xCoor, originY + plotArea.getBottomY()
+ 5, JsChartViewer.Top, c.xAxis().getFormattedLabel(xValue, "hh:nn:ss"),
"font:bold 13px 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_" + id + "_" + i + "_" + j, xCoor,
originY + yCoor, JsChartViewer.Center, viewer.htmlRect(7, 7, color));
viewer.showTextBox("dataLabel" + id + "_" + i + "_" + j, xCoor + 5,
originY + yCoor, JsChartViewer.Left, dataSet.getValue(xIndex).toPrecision(4),
"padding:0px 3px;font:bold 13px Arial;background-color:" + color +
";color:#FFFFFF;-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" selected="selected">5</option>
<option value="10">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 MultiChart
</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.
