我知道有很多这种性质的问题，但我需要使用JavaScript来做到这一点。我使用Dojo 1.8并在数组中拥有所有属性信息，它看起来像这样:
[["name1", "city_name1", ...]["name2", "city_name2", ...]]
知道我如何在客户端将此导出为CSV吗?
当前回答
我添加到Xavier Johns函数也包括字段头，如果需要，使用jQuery。美元的。对于原生javascript循环，每个位都需要更改
function exportToCsv(filename, rows, headers = false) {
var processRow = function (row) {
row = $.map(row, function(value, index) {
return [value];
});
var finalVal = '';
for (var j = 0; j < row.length; j++) {
if(i == 0 && j == 0 && headers == true){
var ii = 0;
$.each(rows[i], function( index, value ) {
//console.log(index);
var fieldName = index === null ? '' : index.toString();
//console.log(fieldName);
var fieldResult = fieldName.replace(/"/g, '""');
//console.log(fieldResult);
if (fieldResult.search(/("|,|\n)/g) >= 0){
fieldResult = '"' + fieldResult + '"';
}
//console.log(fieldResult);
if (ii > 0){
finalVal += ',';
finalVal += fieldResult;
}else{
finalVal += fieldResult;
}
ii++;
//console.log(finalVal);
});
finalVal += '\n';
//console.log('end: '+finalVal);
}
var innerValue = row[j] === null ? '' : row[j].toString();
if (row[j] instanceof Date) {
innerValue = row[j].toLocaleString();
};
var result = innerValue.replace(/"/g, '""');
if (result.search(/("|,|\n)/g) >= 0){
result = '"' + result + '"';
}
if (j > 0){
finalVal += ',';
finalVal += result;
}else{
finalVal += result;
}
}
return finalVal + '\n';
};
var csvFile = '';
for (var i = 0; i < rows.length; i++) {
csvFile += processRow(rows[i]);
}
var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
if (navigator.msSaveBlob) { // IE 10+
navigator.msSaveBlob(blob, filename);
}else{
var link = document.createElement("a");
if (link.download !== undefined) { // feature detection
// Browsers that support HTML5 download attribute
var url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
}
}
其他回答
我添加到Xavier Johns函数也包括字段头，如果需要，使用jQuery。美元的。对于原生javascript循环，每个位都需要更改
function exportToCsv(filename, rows, headers = false) {
var processRow = function (row) {
row = $.map(row, function(value, index) {
return [value];
});
var finalVal = '';
for (var j = 0; j < row.length; j++) {
if(i == 0 && j == 0 && headers == true){
var ii = 0;
$.each(rows[i], function( index, value ) {
//console.log(index);
var fieldName = index === null ? '' : index.toString();
//console.log(fieldName);
var fieldResult = fieldName.replace(/"/g, '""');
//console.log(fieldResult);
if (fieldResult.search(/("|,|\n)/g) >= 0){
fieldResult = '"' + fieldResult + '"';
}
//console.log(fieldResult);
if (ii > 0){
finalVal += ',';
finalVal += fieldResult;
}else{
finalVal += fieldResult;
}
ii++;
//console.log(finalVal);
});
finalVal += '\n';
//console.log('end: '+finalVal);
}
var innerValue = row[j] === null ? '' : row[j].toString();
if (row[j] instanceof Date) {
innerValue = row[j].toLocaleString();
};
var result = innerValue.replace(/"/g, '""');
if (result.search(/("|,|\n)/g) >= 0){
result = '"' + result + '"';
}
if (j > 0){
finalVal += ',';
finalVal += result;
}else{
finalVal += result;
}
}
return finalVal + '\n';
};
var csvFile = '';
for (var i = 0; i < rows.length; i++) {
csvFile += processRow(rows[i]);
}
var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
if (navigator.msSaveBlob) { // IE 10+
navigator.msSaveBlob(blob, filename);
}else{
var link = document.createElement("a");
if (link.download !== undefined) { // feature detection
// Browsers that support HTML5 download attribute
var url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
}
}
基于上面的答案，我创建了这个函数，并在IE 11、Chrome 36和Firefox 29上进行了测试
function exportToCsv(filename, rows) {
var processRow = function (row) {
var finalVal = '';
for (var j = 0; j < row.length; j++) {
var innerValue = row[j] === null ? '' : row[j].toString();
if (row[j] instanceof Date) {
innerValue = row[j].toLocaleString();
};
var result = innerValue.replace(/"/g, '""');
if (result.search(/("|,|\n)/g) >= 0)
result = '"' + result + '"';
if (j > 0)
finalVal += ',';
finalVal += result;
}
return finalVal + '\n';
};
var csvFile = '';
for (var i = 0; i < rows.length; i++) {
csvFile += processRow(rows[i]);
}
var blob = new Blob([csvFile], { type: 'text/csv;charset=utf-8;' });
if (navigator.msSaveBlob) { // IE 10+
navigator.msSaveBlob(blob, filename);
} else {
var link = document.createElement("a");
if (link.download !== undefined) { // feature detection
// Browsers that support HTML5 download attribute
var url = URL.createObjectURL(blob);
link.setAttribute("href", url);
link.setAttribute("download", filename);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
}
}
例如: https://jsfiddle.net/jossef/m3rrLzk0/
这是基于已接受答案的修改答案，其中数据将来自JSON。
JSON Data Ouptut:
0 :{emails: "SAMPLE Co., peter@samplecompany.com"}, 1:{emails: "Another CO. , ronald@another.com"}
JS:
$.getJSON('yourlink_goes_here', { if_you_have_parameters}, function(data) {
var csvContent = "data:text/csv;charset=utf-8,";
var dataString = '';
$.each(data, function(k, v) {
dataString += v.emails + "\n";
});
csvContent += dataString;
var encodedUri = encodeURI(csvContent);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "your_filename.csv");
document.body.appendChild(link); // Required for FF
link.click();
});
如果你正在寻找一个真正快速的解决方案，你也可以给这个小库一个机会，它将为你创建和下载CSV文件:https://github.com/mbrn/filefy
用法非常简单:
import { CsvBuilder } from 'filefy';
var csvBuilder = new CsvBuilder("user_list.csv")
.setColumns(["name", "surname"])
.addRow(["Eve", "Holt"])
.addRows([
["Charles", "Morris"],
["Tracey", "Ramos"]
])
.exportFile();
您可以在原生JavaScript中做到这一点。你必须把你的数据解析成正确的CSV格式(假设你在问题中描述的数据使用数组的数组):
const rows = [
["name1", "city1", "some other info"],
["name2", "city2", "more info"]
];
let csvContent = "data:text/csv;charset=utf-8,";
rows.forEach(function(rowArray) {
let row = rowArray.join(",");
csvContent += row + "\r\n";
});
或者更简单的方法(使用箭头函数):
const rows = [
["name1", "city1", "some other info"],
["name2", "city2", "more info"]
];
let csvContent = "data:text/csv;charset=utf-8,"
+ rows.map(e => e.join(",")).join("\n");
然后就可以使用JavaScript的窗口了。open和encodeURI函数下载CSV文件，如下所示:
var encodedUri = encodeURI(csvContent);
window.open(encodedUri);
编辑:如果你想给你的文件一个特定的名字，你必须做一些不同的事情，因为这是不支持访问一个数据URI使用窗口。开放的方法。为了实现这一点，你可以创建一个隐藏的<a> DOM节点，并将其下载属性设置如下:
var encodedUri = encodeURI(csvContent);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);
link.setAttribute("download", "my_data.csv");
document.body.appendChild(link); // Required for FF
link.click(); // This will download the data file named "my_data.csv".
