Iterating over an IEnumerable in Javascript for Chartjs - javascript

I have hit upon a problem where by I have an IEnumerable<string> of labels and an IEnumerable<double[]> of data in my MVC model object, and I would like to plot these values using Chartjs.
I pass both of in to my javascript function, which I trying to make plot the chart.
The Chartjs syntax is such that I want, in effect:
var data = {
... chart info e.g. colors, etc.
datasets: [
{
label: labels[0], // My first label
data: datas[0] // My first double[]
},
// Repeat for each data/label combo
{
label: labels[n], // My n-th label
data: datas[n] // My n-th double[]
}
]
};
Given my two collections, how can I extract the information within them appropriately? Clearly the lengths of these collections need to be the same, as there is a one-to-one association. I did try combing them in to a Tuple but I think that will make it more complicated on the js side.
Or does anyone know an easier way to achieve the same end result with ChartJS?
I'm comfortable with C# but Javascript is new to me.

You can certainly send a tuple to the client side and split it up easily with java-script. You could do a simple ajax call to get your tuple as a Json object and then split it up into two arrays. Those arrays could then be used in the chart.js label and data spots.
$.ajax({
url: 'AjaxCall/getChartObjects',
dataType: 'json',
data: {},
success: function (data) { //data here being the tuple recieved from server
//receive the tuple as a single Json object and split it up easily with some seperate arrays
dblArray= []
$.each(data.Item1, function (index, value) {
dblArray.push(value.text); //label array
}
descArray= []
$.each(data.Item2, function (index, value) {
descArray.push(value.dblTxt); //data array
}
},
error: function (xhr, status, error) {
console.log('Error: ' + error.message);
}
});
Sending the tuple from the controller would be something like:
//tuple sends two objects together- both job arrays will be seperated
//and used in observables on client side
var chartObjects = Tuple.Create(chartData, chartLabel);
return Json(chartObjects, JsonRequestBehavior.AllowGet);
You would then have the arrays that you need to place in the chart properties:
var barChartData = {
labels: descArray, //array labels
datasets: [
{
type: "Bar",
strokeColor: "black",
pointColor: "rgba(220,220,220,1)",
pointstrokeColor: "white",
data: dblArray,
}
]
}
I guess I'm not entirely sure if this is what you were looking for. Let me know if you have questions.

Related

C3 js, how to access json data received in url call

Below is the code to generate barchart using C3 js library
var chart = c3.generate({
bindto: '#barchart',
data: {
url: './API/get_bar_chart_data.php',
mimeType: 'json',
type: 'bar',
keys: {
x: 'category', // it's possible to specify 'x' when category axis
value: [ 'number']
},
onclick: function (d, i) {
console.log(chart.categories()[d.index]);
onclick_barchart();
}
},
bar: {
width: {
ratio: 0.5 // this makes bar width 50% of length between ticks
}
},
axis: {
x: {
type: 'category' // this needed to load string x value
}
}
});
In the above code I am getting data from URL in json format.
Now on click I want to pass this complete json received to onclick_barchart() function.
C3.js converts data received in internal format, so there's no way to get data as received.
IMO, there're 2 ways to handle this.
If you need to handle data keeping as received, maybe you need to call separately. Not in context of C3.js.
// call api and assign the result in separate variable
var data = call_ajax("./API/get_bar_chart_data.php");
var chart = c3.generate({
data: {
columns: data
onclick: function() {
onclick_barchart(data);
}
},
...
}
Or, access transformed data via internal data variable
In this case, you need to handle the format as your necessity.
var chart = c3.generate({
data: {
columns: data
onclick: function() {
// You can access in outside via 'chart.internal.data.targets'
// They're same result from .data() API
// https://naver.github.io/billboard.js/release/latest/doc/Chart.html#data
onclick_barchart(this.data.targets);
}
},
...
}

Zingchart Live Feed View Change

Let me start off by saying I am fairly new to this.
So what I'm currently doing is I'm playing around with the live feed chart using a js function that produces and stringifies random numbers.
window.feed = function(callback) {
var tick = {};
tick.plot0 = parseInt(10+900*Math.random(), 10);
callback(JSON.stringify(tick));
};
The first issue I'm trying to tackle is being able to switch charts with the click of a button without the feed restarting, essentially having the feed function running in the back and (I'd assume) storing the data into an array? Would that be the correct approach? But currently, when I click the button it just restarts the feed. Here's the code:
$('#chartButton').bind('click', function(){
zingchart.exec('chart', 'setdata',{
'data': {
'type': 'bar',
"refresh":{
"type":"feed",
"transport":"js",
"url":"feed()",
"interval":200
},
'series':[
{
'values':[]
//[11,26,7,44,11]
},
{
'values':[]
//[42,13,21,15,33]
}
]
}
});
});
$('#lineButton').bind('click', function(){
zingchart.exec('chart', 'setdata',{
'data': {
'type': 'line',
"refresh":{
"type":"feed",
"transport":"js",
"url":"feed()",
"interval":200
},
'series':[
{
'values':[]
// [11,26,7,44,11]
},
{
'values':[]
// [42,13,21,15,33]
}
]
}
});
});
$('#areaButton').bind('click', function(){
zingchart.exec('chart', 'setdata',{
'data': {
'type': 'area',
"refresh":{
"type":"feed",
"transport":"js",
"url":"feed()",
"interval":200
},
'series':[
{
'values':[]
// [11,26,7,44,11]
},
{
'values':[]
// [42,13,21,15,33]
}
]
}
});
});
And lastly, I'm trying to make it so it has two different "values" being displayed on the chart, but I can't seem to figure out how I would do that. The tutorial says if you're going to use two values inputs create the objects, but doesn't extrapolate on how to get the different values transmuted.
My hunch is that I create the feed function, but store all the values being created into an array, one for each function. Then assign those arrays to be the values of the chart, but I've been having trouble figuring out exactly how to increment through an array in javascript so you can keep adding more and more data to it as it is created. Any help would be much appreciated.

ajax result differ if it is placed inside a variable using javascript

Hi and Good day to all,
I have a dilemma which includes javasript and ajax. I have an ajax code which is show below (not the whole code but part of the code, so some brackets might be missing but it works correctly)
$.ajax({
url: "ajax/month.php",
type: 'POST',
data: { telcos: telco, start: sdate, end: edate, regions: region},
success: function (dataofconfirm) {
var month = dataofconfirm;
alert(month);
In the ajax above (of course it was inside a javascript), when i tried to alert it this is the result
Then I tried to place a monthly sales chart like the one below
This is the code (javascript) of my sales chart
var months = month;
// Get context with jQuery - using jQuery's .get() method.
var salesChartCanvas = $("#salesChart").get(0).getContext("2d");
// This will get the first returned node in the jQuery collection.
var salesChart = new Chart(salesChartCanvas);
var salesChartData = {
labels: months,
datasets: [
{
label: "SMART",
fillColor: "rgb(255,40,40)",
strokeColor: "rgb(255,40,40)",
pointColor: "rgb(253,16,16)",
pointStrokeColor: "#c1c7d1",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgb(220,220,220)",
data: [65, 59, 80, 81, 56, 55, 40]
}
Above code is just a portion again so some brackets might be missing.
Notice that I placed the ajax result inside var months
But when the javascript loads and finishes its process the result is like the one below
Instead of a certain number per months will be shown it now displays that certain number per letter in the month variable.
How Can i fix this. The result mut be like the one below(this is just a static so its correct)
This is whar the labels:months should look like
labels: ["August", "September", "October", "November"],
The ajax response is returning a string, not an array.
In JavaScript (and most languages) a string can be treated as an array of characters. Which is what is happening here.
Instead you need to parse the returned data as JSON, you can do this one of two ways:
JSON.parse(month); // <-- the result returned from the server
Or using jQuery $.ajax
$.ajax({
url: "ajax/month.php",
dataType: "json", // <-- response will be an object, not a string
type: 'POST',
data: { telcos: telco, start: sdate, end: edate, regions: region},

Select2 Multiple format to be passed to JSON

I am using the select2 multiple for search box. I am passing these data with JSON and saving it using ajax(JSON stringify).
I just need 2 variables passed, which is the ID(primary key, customized) and the Selection itself.
I managed to save it to the database when only 1 value is selected.
When selecting multiple values, in my console.log, I see something like this
{21,23,25,26}
which is the selection itself.
How do I get it show like this,
Object0->{id:1, selection:21}
Object1->{id:2, selection:23}
Object2->{id:3, selection:25}
Object3->{id:4, selection:26}
Below is the code I am using,
var nature = {
ubtBusinessInfo: businessId, // the primary key
ubtBusinessListing: nature.val() // here is selection
};
Here is the initialization of the select2,
nature
.select2({
allowClear: true,
placeholder: "Filter as you type",
minimumInputLength: 3,
multiple: true,
ajax: {
url: 'home/umkei/info/nature',
dataType: 'json',
quietMillis: 250,
data: function (term, page) {
return { q: term };
},
results: function (data, page) {
return { results: data };
},
cache: true
}
})
nature is defined from(I tried both as below)
var nature = $('[name=nature_business]') OR var nature = $(#nature_business);
I know it must have something to do with the nature.val() usage. Must have been something like array but I dont know how to differentiate/split those data to be key->value pairs.
Thank you.
I got this about last week and thought I'd share my solution.
var nature=[];
var splitnature = nature_business.val().trim().split(',');
var n;
for(n=0; n<=splitnature.length-1;n++){
nature.push({
ubtBusinessListing: splitnature[n],
ubtBusinessInfo: businessId
});
}

ECharts - Set options to externally loaded arrays

So I am using the library ECharts to create some charts and graphs for various data that I have on a website. This is my first time using the library and I am fairly new to Javascript/jQuery. What I am trying to do is set the xAxis data to the results from a local page which will return a JSON Object with an array containing the days of the week. After I can do this, I then plan to load the Series data in the same way.
The jSON that is returned is this
When I am trying to set the data for xAxis, I am doing it as shown
xAxis: [{
type: 'category',
boundaryGap: false,
data: function(){
$.ajax({
type: "POST",
url: "ajax/getData.php?test=t&graph_last_days=d&days=7",
cache: false,
success: function(result){
return result.data;
//console.log(result.data);
}
});
}
}],
However, I keep getting the error Uncaught TypeError: o.slice is not a function and this error is only being outputted when I try and use this method of setting the data. In addition to this, if I try and make a function to return the data from the external page and set a variable to that, whenever I try and print it to the console it says undefined
If I do not use my method of trying to load the external data and I predefine the data like so
xAxis: [{
type: 'category',
boundaryGap: false,
data: [
'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'
]
}]
Then there are no errors and it works just fine
Can anyone see the problem?
Seems that after speaking with some people, the only example usage or documentation available is this example they have which is closely related to my question here.
If anyone else wants some examples related to ajax or dynamic data loading with ECharts then here are some (in English) *
Line + Bar
Scatter + Candlestick
Pie + Radar
Helpful tip
If you do not speak Chinese and you are using some sort of translator for their code examples; be aware that it's common for websites such as Google Translate and Bing Translator to incorrectly translate the punctuation used in JS by doing things such as,
Translating arrays with single quotes into arrays with single quotes and double quotes: thus causing syntax errors.
Removing commas (,) from objects.
Changing Semi-colon's (;) into Colon's (:) or even removing them.
complete example for echarts pushing data from Ajax call
data.importPorts -> Array of strings
data.importBD -> Array of Objects { clientanem : [4,5,6,7,3]}
$.get("/Home/Graph1", { clients: "403,300", years: "2012" })
.done(function (data) {
var option = {
tooltip: {
show: true
},
legend: {
data: (function () {
var res = [];
for (var name in data.importBD) {
res.push(name);
};
return res;
})()
},
xAxis: [
{
type: 'category',
data: (function () {
var res = [];
data.importPorts.forEach(function (i) {
res.push(i);
});
return res;
})()
}
],
yAxis: [
{
type: 'value'
}
],
series: [
{
}
]
};
for (var name in data.importBD) {
var obj = {
name: name,
type: "bar",
data: data.importBD[name]
};
option.series.push(obj);
}
// Load data into the ECharts instance
imprtChart.setOption(option);
});

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