I am converting my JSON to CSV using the below-mentioned function, I want to know if there is a way to send style to my CSV file. I need background color for header, Border for all the cells and Auto-column adjustment.
function JSONToCSVConvertor(JSONData, ReportTitle, ShowLabel) {
//If JSONData is not an object then JSON.parse will parse the JSON string in an Object
var arrData = typeof JSONData != 'object' ? JSON.parse(JSONData) : JSONData;
var CSV = '';
//Set Report title in first row or line
CSV += ReportTitle + '\r\n\n';
//This condition will generate the Label/Header
if (ShowLabel) {
var row = "";
//This loop will extract the label from 1st index of on array
for (var index in arrData[0]) {
//Now convert each value to string and comma-seprated
row += index + ',';
}
row = row.slice(0, -1);
//append Label row with line break
CSV += row + '\r\n';
}
//1st loop is to extract each row
for (var i = 0; i < arrData.length; i++) {
var row = "";
//2nd loop will extract each column and convert it in string comma-seprated
for (var index in arrData[i]) {
row += '"' + arrData[i][index] + '",';
}
row.slice(0, row.length - 1);
//add a line break after each row
CSV += row + '\r\n';
}
if (CSV == '') {
alert("Invalid data");
return;
}
//Generate a file name
var fileName = "Report_";
//this will remove the blank-spaces from the title and replace it with an underscore
fileName += ReportTitle.replace(/ /g, "_");
//Initialize file format you want csv or xls
var uri = 'data:text/csv;charset=utf-8,' + escape(CSV);
// Now the little tricky part.
// you can use either>> window.open(uri);
// but this will not work in some browsers
// or you will not get the correct file extension
//this trick will generate a temp <a /> tag
var link = document.createElement("a");
link.href = uri;
//set the visibility hidden so it will not effect on your web-layout
link.style = "visibility:hidden";
link.download = fileName + ".csv";
//this part will append the anchor tag and remove it after automatic click
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
This is the function I am using to for CSV generation with all the details mentioned in the comments after each step.
If you have any doubts please ask freely any type of suggestion will be valuable to me.
Thanks in advance.
Hey Guys i wanted to create a link which creates a csv of my JSON array.
My Code creates a CSV File every time when i reload my page
i can't see a link, where i can click. I'm really beginner of JS
Could Someone help me?
var csvContent = "data:text/csv;charset=utf-8,";
// Iterating through all the objects
data.forEach(function (infoArray, index) {
// Fetching all keys of a single object
var _keys = Object.keys(infoArray);
var dataString = [];
[].forEach.call(_keys, function(inst, i){
dataString.push(infoArray[inst]);
});
dataString = dataString.join(";");
csvContent += index < data.length ? dataString + "\n" : dataString;
});
var encodedUri = encodeURI(csvContent);window.open(encodedUri);
var encodedUri = encodeURI(csvContent);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "my_data.csv");
link.click();
you have created a link , but you need append it somewhere
for example
document.body.appendChild(link)
I used it like this
It works
<input id="csv" type="button" value="CSV">
//--------------------------- CSV EXPORT --------------------------------
var csvContent = "data:text/csv;charset=utf-8,";
$("#csv").click(function(){
// Iterating through all the objects
data.forEach(function (infoArray, index) {
// Fetching all keys of a single object
var _keys = Object.keys(infoArray);
var dataString = [];
[].forEach.call(_keys, function(inst, i){
dataString.push(infoArray[inst]);
});
dataString = dataString.join(";");
csvContent += index < data.length ? dataString + "\n" : dataString;
});
var encodedUri = encodeURI(csvContent);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "my_data.csv");
link.click();
});
I am facing problem with exporting csv.
Problems:
1) I have to export a html table to csv file . Can i change the delimiter of csv file to something else like semicolon. If I have values in the table under the same column separated by comma, in the csv sheet it is showing in a different column.
2) My code is not working for IE and it is only working for mozilla
3) Also I wanted the user to save the csv file. Now it is getting automatically saved.
Please find my code . Can any body help with any of the issue.
function exportTableToCSV(filename) {
var tab = $('#searchObjectTableTabs').tabs('getSelected');// selecting the table
var tabIndex = $('#searchObjectTableTabs').tabs('getTabIndex', tab);
var data;
var rows;
if (tabIndex == '0') // first index of the tab under which the table will be displayed
{
data = $('#dg');//Only one table
rows = $('#dg').datagrid('getRows');
} else if (tabIndex == '1') // second index
{
data = $('#doc').first(); //Only one table
rows = $('#doc').datagrid('getRows');
}
var csvData = [];
var tmpArr = [];
var tmpStr = '';
data.find("tr").each(function ()
{
if ($(this).find("th").length) {
$(this).find("th").each(function () {
tmpStr = $(this).text().replace(/"/g, '""');
tmpArr.push('"' + tmpStr + '"');
});
csvData.push(tmpArr);
}
tmpArr = [];
$.each(exportArray, function (index, value)
{
csvData.push(exportArray[index].type + "," + exportArray[index].status + "," + exportArray[index].ID + "," + exportArray[index].itemrev + "," + exportArray[index].desc + "," + exportArray[index].owner + "," + exportArray[index].ogrp);
});
csvData.push(tmpArr.join('\n'));
// printObject(tmpArr);
});
alert('before this');
var output = csvData.join('\n');
csvData = 'data:application/csv;charset=utf-8,' + encodeURIComponent(output);
$(this)
.attr({
'download': filename,
'href': csvData,
'target': '_blank'
'delimiter':';'
});
alert('done');
}
$(".export").on('click', function (event) {
// CSV
exportTableToCSV.apply(this,['export.csv']);
});
I am using the code below to export nearly 3,000 JSON records to CSV format. It is working in Chrome and Opera but not in Safari, IE, or Firefox. I have an "out of browser memory" issue.
Why doesn't it work in those browsers?
How can I export many (e.g. 90,000) records in any browser?
function exportAll(JSONData, ReportTitle, ShowLabel) {
var arrData = typeof JSONData != 'object' ? JSON.parse(JSONData) : JSONData;
var CSV = '';
CSV += ReportTitle + '\r\n\n';
if (ShowLabel) {
var row = "";
for (var index in arrData[0]) {
row += index + ',';
}
row = row.slice(0, -1);
CSV += row + '\r\n';
}
for (var i = 0; i < arrData.length; i++) {
var row = "";
for (var index in arrData[i]) {
row += '"' + arrData[i][index] + '",';
}
row.slice(0, row.length - 1);
CSV += row + '\r\n';
}
if (CSV == '') {
alert("Invalid data");
return;
}
var link = document.createElement("a");
link.id = "lnkDwnldLnk";
//this part will append the anchor tag and remove it after automatic click
document.body.appendChild(link);
var csv = CSV;
blob = new Blob([csv], {
type: 'text/csv'
});
var csvUrl = window.webkitURL.createObjectURL(blob);
var filename = 'GraphsData.csv';
$("#lnkDwnldLnk")
.attr({
'download': filename,
'href': csvUrl
});
$('#lnkDwnldLnk')[0].click();
document.body.removeChild(link);
}
I am trying to export a file as .csv file so that when the user clicks on the download button, the browser would automatically download the file as .csv.
I also want to be able to set a name for the .csv file to be exported
I am using javascript to do this
The code is below:
function ConvertToCSV(objArray) {
var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
var str = '';
for (var i = 0; i < array.length; i++) {
var line = '';
for (var index in array[i]) {
if (line != '') line += ','
line += array[i][index];
}
str += line + '\r\n';
}
return str;
}
// Example
$(document).ready(function () {
// Create Object
var items = [
{ "name": "Item 1", "color": "Green", "size": "X-Large" },
{ "name": "Item 2", "color": "Green", "size": "X-Large" },
{ "name": "Item 3", "color": "Green", "size": "X-Large" }];
// Convert Object to JSON
var jsonObject = JSON.stringify(items);
// Display JSON
$('#json').text(jsonObject);
// Convert JSON to CSV & Display CSV
$('#csv').text(ConvertToCSV(jsonObject));
$("#download").click(function() {
alert("2");
var csv = ConvertToCSV(jsonObject);
window.open("data:text/csv;charset=utf-8," + escape(csv))
///////
});
});
I have written a solution in this thread: How to set a file name using window.open
This is the simple solution:
$("#download_1").click(function() {
var json_pre = '[{"Id":1,"UserName":"Sam Smith"},{"Id":2,"UserName":"Fred Frankly"},{"Id":1,"UserName":"Zachary Zupers"}]';
var json = $.parseJSON(json_pre);
var csv = JSON2CSV(json);
var downloadLink = document.createElement("a");
var blob = new Blob(["\ufeff", csv]);
var url = URL.createObjectURL(blob);
downloadLink.href = url;
downloadLink.download = "data.csv";
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
});
JSON2CSV function:
function JSON2CSV(objArray) {
var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
var str = '';
var line = '';
if ($("#labels").is(':checked')) {
var head = array[0];
if ($("#quote").is(':checked')) {
for (var index in array[0]) {
var value = index + "";
line += '"' + value.replace(/"/g, '""') + '",';
}
} else {
for (var index in array[0]) {
line += index + ',';
}
}
line = line.slice(0, -1);
str += line + '\r\n';
}
for (var i = 0; i < array.length; i++) {
var line = '';
if ($("#quote").is(':checked')) {
for (var index in array[i]) {
var value = array[i][index] + "";
line += '"' + value.replace(/"/g, '""') + '",';
}
} else {
for (var index in array[i]) {
line += array[i][index] + ',';
}
}
line = line.slice(0, -1);
str += line + '\r\n';
}
return str;
}
in modern browsers there is a new attribute in anchors.
download
http://caniuse.com/download
so instead of using
window.open("data:text/csv;charset=utf-8," + escape(csv))
create a download link:
download
another solution is to use php
EDIT
i don't use jQuery, but you need to edit your code to add the download link
with something like that in your function.
var csv=ConvertToCSV(jsonObject),
a=document.createElement('a');
a.textContent='download';
a.download="myFileName.csv";
a.href='data:text/csv;charset=utf-8,'+escape(csv);
document.body.appendChild(a);
Try these Examples:
Example 1:
JsonArray = [{
"AccountNumber": "1234",
"AccountName": "abc",
"port": "All",
"source": "sg-a78c04f8"
}, {
"Account Number": "1234",
"Account Name": "abc",
"port": 22,
"source": "0.0.0.0/0",
}]
JsonFields = ["Account Number","Account Name","port","source"]
function JsonToCSV(){
var csvStr = JsonFields.join(",") + "\n";
JsonArray.forEach(element => {
AccountNumber = element.AccountNumber;
AccountName = element.AccountName;
port = element.port
source = element.source
csvStr += AccountNumber + ',' + AccountName + ',' + port + ',' + source + "\n";
})
return csvStr;
}
You can download the csv file using the following code :
function downloadCSV(csvStr) {
var hiddenElement = document.createElement('a');
hiddenElement.href = 'data:text/csv;charset=utf-8,' + encodeURI(csvStr);
hiddenElement.target = '_blank';
hiddenElement.download = 'output.csv';
hiddenElement.click();
}
I just wanted to add some code here for people in the future since I was trying to export JSON to a CSV document and download it.
I use $.getJSON to pull json data from an external page, but if you have a basic array, you can just use that.
This uses Christian Landgren's code to create the csv data.
$(document).ready(function() {
var JSONData = $.getJSON("GetJsonData.php", function(data) {
var items = data;
const replacer = (key, value) => value === null ? '' : value; // specify how you want to handle null values here
const header = Object.keys(items[0]);
let csv = items.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(','));
csv.unshift(header.join(','));
csv = csv.join('\r\n');
//Download the file as CSV
var downloadLink = document.createElement("a");
var blob = new Blob(["\ufeff", csv]);
var url = URL.createObjectURL(blob);
downloadLink.href = url;
downloadLink.download = "DataDump.csv"; //Name the file here
document.body.appendChild(downloadLink);
downloadLink.click();
document.body.removeChild(downloadLink);
});
});
Edit: It's worth noting that JSON.stringify will escape quotes in quotes by adding \". If you view the CSV in excel, it doesn't like that as an escape character.
You can add .replace(/\\"/g, '""') to the end of JSON.stringify(row[fieldName], replacer) to display this properly in excel (this will replace \" with "" which is what excel prefers).
Full Line: JSON.stringify(row[fieldName], replacer).replace(/\\"/g, '""')
One-liner function for simple JSON with static titles
Assuming arr is JSON array, you can also replace the first string with comma separated titles end with \n
arr.reduce((acc, curr) => (`${acc}${Object.values(curr).join(",")}\n`), "")
Or with the window.open function mentioned before
window.open(`data:text/csv;charset=utf-8,${arr.reduce((acc, curr) => (`${acc}${Object.values(curr).join(",")}\n`), "")}`)
You should also consider escape the strings or replace the , to avoid extra cells
If your data comes from a SQL Database, all your lines should have the same structure, but if coming from a NoSQL Database you could have trouble using standard answers. I elaborated on above JSON2CSV for such a scenario.
Json data example
[ {"meal":2387,"food":"beaf"},
{"meal":2387,"food":"apple","peeled":"yes", "speed":"fast" },
{"meal":2387,"food":"pear", "speed":"slow", "peeled":"yes" } ]
Answer
"meal","food","peeled","speed"
"2387","beaf","",""
"2387","apple","yes","fast"
"2387","pear","yes","slow"
Code for headers and double quotes for simplicity.
function JSON2CSV(objArray) {
var array = typeof objArray != 'object' ? JSON.parse(objArray) : objArray;
var str = '';
var line = '';
// get all distinct keys
let titles = [];
for (var i = 0; i < array.length; i++) {
let obj = array[i];
Object.entries(obj).forEach(([key,value])=>{
//console.log('key=', key, " val=", value );
if (titles.includes(key) ) {
// console.log (key , 'exists');
null;
}
else {
titles.push(key);
}
})
}
let htext = '"' + titles.join('","') + '"';
console.log('header:', htext);
// add to str
str += htext + '\r\n';
//
// lines
for (var i = 0; i < array.length; i++) {
var line = '';
// get values by header order
for (var j = 0; j < titles.length; j++) {
// match keys with current header
let obj = array[i];
let keyfound = 0;
// each key/value pair
Object.entries(obj).forEach(([key,value])=>{
if (key == titles[j]) {
// console.log('equal tit=', titles[j] , ' e key ', key ); // matched key with header
line += ',"' + value + '"';
keyfound = 1;
return false;
}
})
if (keyfound == 0) {
line += ',"' + '"'; // add null value for this key
} // end loop of header values
}
str += line.slice(1) + '\r\n';
}
return str;
}