I really hope there is some ASP.net / Javascript guru, that can be able to help me.
Situation is this. I've found a live graph (Highchart) java script that spits out some random data. I like the X-axis in this specific graph, but I would like to get the Y-axis data from a database, if it could spit out the latest inserted data every time would be great! Thing is, i don't know how! :/
Javascript / HTML:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="scadaOverview.aspx.cs" Inherits="CyberFarminScada2.SCADA.scadaOverview" MasterPageFile="~/Template.Master" %>
<asp:Content ID="Content1" ContentPlaceHolderId="CPH1" runat="server">
<script src="http://ajax.microsoft.com/ajax/jquery/jquery-1.5.1.min.js" type="text/javascript"></script>
<script src="Content/Highcharts-3.0.10/js/highcharts.js"></script>
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto">
<!-- <asp:Literal ID="scadaChart" runat="server"></asp:Literal> -->
<script type="text/jscript">
$(function () {
$(document).ready(function () {
Highcharts.setOptions({
global: {
useUTC: false
}
});
var chart;
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
},
title: {
text: 'Live random data'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Random data',
data: (function () {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -19; i <= 0; i++) {
data.push({
x: time + i * 1000,
y: function () { PageMethods.getData() }
});
}
return data;
})()
}]
});
});
});
</script>
</div>
</asp:Content>
I have no methods, other than the Page_Load in the code behind class.
Please, if you know... Help :'(
In the setInterval (load evenet) you can call $.getJSON() functio to url which returns data, then use values from json and use chart.addPoint as you have.
Related
I have this example code where I wanna update my chart every time on event "onmessage" but it doesnt update the chart.
A console.log() shows me that the callback is executed with the right values but nothing appears in the chart.
HTML part
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>
<script src="https://code.highcharts.com/modules/export-data.js"></script>
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
JavaScript Part:
setting the options....
$(document).ready(function () {
Highcharts.setOptions({
global: {
useUTC: false
},
plotOptions: {
series: {
turboThreshold: 0 // 0 to disable https://api.highcharts.com/highcharts/plotOptions.series.turboThreshold
}
}
});
creating the chart with a timespan of 1 hour:
var chart = Highcharts.chart('container', {
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10
},
title: {
text: 'Live Test.sensor.val'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: true
},
exporting: {
enabled: true
},
series: [{
name: 'Test.sensor.val',
data: (function () {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -60 * 60; i <= 0; i += 1) { //defines the visible timespan on x axis
data.push({
x: time + i * 1000,
y: null
});
}
return data;
}())
}]
});
here I am hoping to get the values into the chart but it is not working...
Just the console.log() shows me the values but nothing is updated in the chart.
var ev = new EventSource("/incommingEventHandler.ashx");
ev.onmessage = function (e) {
var dat = e.data;
var x = (new Date()).getTime(), // current time
y = dat;
console.log(x, y); //showing values correctly but no update on chart? Why?
chart.series[0].addPoint([x, y], true, true);
};
});
Thanks Dieter
it was my fault.
Server sent events seams to be transmitted as strings.
Therefore my value from e.data is from type string.
I casted it via parseFloat(y) and everything is working fine now.
I am trying to plot a chart which will read a data from csv file which is appending on every minute with latest data as per below format.
The chart will continue reading data from csv file and show the graph on every second wise. Can you please help me on this? I want to show the exact time which are coming from file should be show on graph.
CSV format..
time,count
18:01:00,3
18:01:01,4
....
$(document).ready(function () {
var csv = [],
x;
Highcharts.setOptions({
global: {
useUTC: false
}
});
var data = 'time,count\n18:01:00,3\n18:01:01,4';
//$.get('data.csv', function(data) {
var lines = data.split('\n');
$.each(lines, function(lineNo, line) {
if(lineNo > 0) {
var items = line.split(',');
useUTC: false;
x = items[0].split(':');
csv.push([Date.UTC(2015,1,1,x[0],x[1],x[2]), parseFloat(items[1])]);
}
});
console.log(csv);
$('#container').highcharts({
chart: {
renderTo: 'container',
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
useUTC: false,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var l = series.data.length - 1,
lastX = series.data[l].x;
$.get('data.csv', function(data) {
var lines = data.split('\n'),
len = lines.length,
items = lines[len - 1].split(','),
x = items[0].split(':'),
y = parseFloat(items[1]);
useUTC: false;
x = Date.UTC(2015,1,1,x[0],x[1],x[2]);
if(x !== lastX) {
series.addPoint([x, y], true, true);
}
});
}, 1000); //refresh each 1 second
}
}
},
title: {
text: 'TPS Data'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 3,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Count',
data: csv
}]
});
//});
});
div {
min-width: 50px;
height: 200px;
margin: 0 auto;
}
<script type="text/javascript" src="http://code.jquery.com/jquery-1.12.0.js"></script>
<script type="text/javascript" src="http://code.highcharts.com/highcharts.js"></script>
<div id="container" style=""></div>
Note In the snippet I was replace the ajax function $.get with hardcoded data so it will show the result but the question is about the ajax way.
I have a similar requirement and created a fiddle
I am trying to make use of tickPositions to set the xAxis ticks but the problem is the ticks are moving out of the chart window. Can, any one please help me with this. Also, please let me know if I am doing something wrong.
$(function() {
$(document).ready(function() {
Highcharts.setOptions({
global: {
useUTC: false
}
});
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function() {
// set up the updating of the chart each second
var series = this.series[0];
var xAxis = this.xAxis[0];
setInterval(function() {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
xAxis.options.tickPositions.push(x);
}, 1000);
}
}
},
title: {
text: 'Live random data'
},
xAxis: {
type: 'datetime',
tickPositions: [],
labels: {
formatter: function() {
return Highcharts.dateFormat('%H:%M:%S', this.value);
}
},
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Random data',
data: (function() {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -10; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: Math.random()
});
}
return data;
}())
}]
});
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<div id="container" style="min-width: 310px; height: 400px; margin: 0 auto"></div>
I used following file to display a highchart. but it doesnt display anything at all. Can anyone point me the mistake here. I just used code from here
Is the ordering of javascript import correct.? could anyone please help me to correct this html to display highchart.
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script src="http://code.highcharts.com/modules/exporting.js"></script>
<script src="http://code.highcharts.com/stock/highstock.js"></script>
<script>
$(function() {
$(document).ready(function() {
Highcharts.setOptions({
global: {
useUTC: false
}
});
var chart;
chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
type: 'ohlc',
marginRight: 10,
events: {
load: function() {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function() {
var x = (new Date()).getTime();
series.addPoint([
x,
Math.random()*100,
Math.random()*100,
Math.random()*100,
Math.random()*100
], true, true);
}, 1000);
}
}
},
title: {
text: 'Live random data'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'}]
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' + Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' + Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Random data',
type: 'ohlc',
data: (function() {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -19; i <= 0; i++) {
data.push([
time + i * 1000,
Math.random()*100,
Math.random()*100,
Math.random()*100,
Math.random()*100
]);
}
return data;
})()}]
});
});
});
</script>
</head>
<body>
<div id="container" style="min-width: 400px; height: 400px; margin: 0 auto"></div>
</body>
</html>
The JavaScript console is saying undefined function. When I put the highstock script above the exporting script, as in the jsfiddle you linked, it works fine.
The problem is that you refer to serie OHLC which is supported only in Highstock. So you need to attach highstock.js
I'm new in Laravel, so I'm still facing problems whenever I try to add js functions to my code.
I need to add a highchart to my laravel project. As a beginning, I just copied the code of one of the charts available on highcharts.com and pasted it in the main view, but nothing is being displayed.
When I added the same code to a normal html file, the graph was displayed normally.
Here's my javascript code
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script src="http://code.highcharts.com/highcharts.js"></script>
<script type="text/javascript">
$(function () {
$(document).ready(function () {
Highcharts.setOptions({
global: {
useUTC: false
}
});
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
events: {
load: function () {
// set up the updating of the chart each second
var series = this.series[0];
setInterval(function () {
var x = (new Date()).getTime(), // current time
y = Math.random();
series.addPoint([x, y], true, true);
}, 1000);
}
}
},
title: {
text: 'Live random data'
},
xAxis: {
type: 'datetime',
tickPixelInterval: 150
},
yAxis: {
title: {
text: 'Value'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
tooltip: {
formatter: function () {
return '<b>' + this.series.name + '</b><br/>' +
Highcharts.dateFormat('%Y-%m-%d %H:%M:%S', this.x) + '<br/>' +
Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Random data',
data: (function () {
// generate an array of random data
var data = [],
time = (new Date()).getTime(),
i;
for (i = -19; i <= 0; i += 1) {
data.push({
x: time + i * 1000,
y: Math.random()
});
}
return data;
}())
}]
});
});
});
</script>
and the html code
<div id="container" style="width:100%; height:400px;"></div>
Any suggestions how to display the graph?
Thanks in advance.
I think the problem is with the syntax you are creating the chart with: $('#container').highcharts...
It seems highcharts function is not defined using laravel.
There is another way that you can try:
var chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
...
},
...
});