/*********************************************************************************
* HTML save data to CSV or excel
* 说明：
* 将网页内容保存到csv文件或者execl中。
*
* 2017-10-28 深圳 南山平山村 曾剑锋
********************************************************************************/
一、参考文档：
1. store data from a form using just HTML
https://stackoverflow.com/questions/14360769/store-data-from-a-form-using-just-html
2. Write to CSV file locally with HTML5
https://stackoverflow.com/questions/27013963/write-to-csv-file-locally-with-html5
3. Web导出excel的几种方法
http://taote.iteye.com/blog/842496
4. JS直接导出excel 兼容ie、chrome、firefox
http://blog.csdn.net/sinat_15114467/article/details/51098522
5. How do I export html table data as .csv file?
https://stackoverflow.com/questions/7161113/how-do-i-export-html-table-data-as-csv-file
二、原理：
data协议方式：对于支持data协议的浏览器，可以将html或是csv先用js base64处理，然后前缀data:application/vnd.ms-excel;base64,，即可使浏览器将其中的数据当做excel来处理，浏览器将提示下载或打开excel文件,可惜的是ie不支持。extjs的官网有一个grid的plugin，实现导出xhtml格式的伪excel文件，就是这么做的。
三、Example
<!DOCTYPE html>
<html>
<head>
<!-- <script src="jquery-3.2.1.min.js"></script> -->
<script src="https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.2.1.min.js"></script>
<script type="text/javascript">
function exportTableToCSV($table, filename) {
var $rows = $table.find('tr:has(td),tr:has(th)'),
// Temporary delimiter characters unlikely to be typed by keyboard
// This is to avoid accidentally splitting the actual contents
tmpColDelim = String.fromCharCode(11), // vertical tab character
tmpRowDelim = String.fromCharCode(0), // null character
// actual delimiter characters for CSV format
colDelim = '","',
rowDelim = '"\r\n"',
// Grab text from table into CSV formatted string
csv = '"' + $rows.map(function (i, row) {
var $row = $(row), $cols = $row.find('td,th');
return $cols.map(function (j, col) {
var $col = $(col), text = $col.text();
return text.replace(/"/g, '""'); // escape double quotes
}).get().join(tmpColDelim);
}).get().join(tmpRowDelim)
.split(tmpRowDelim).join(rowDelim)
.split(tmpColDelim).join(colDelim) + '"',
// Data URI
csvData = 'data:application/csv;charset=utf-8,' + encodeURIComponent(csv);
console.log(csv);
if (window.navigator.msSaveBlob) { // IE 10+
//alert('IE' + csv);
window.navigator.msSaveOrOpenBlob(new Blob([csv], {type: "text/plain;charset=utf-8;"}), "csvname.csv")
}
else {
$(this).attr({ 'download': filename, 'href': csvData, 'target': '_blank' });
}
}
$(function() {
// This must be a hyperlink
$("#xx").on('click', function (event) {
// exportTableToCSV.apply(this, [$('#projectSpreadsheet'), 'export.csv']);
exportTableToCSV.apply(this, [$('#QMSTable'), 'export.csv']);
// IF CSV, don't do event.preventDefault() or return false
// We actually need this to be a typical hyperlink
});
});
function fillHidTable(){
var htqf; //-- hidden field
var rf; //-- retrieved field
for ( var i = 1; i < 5; i++ ) {
rf = "htqf"+i;
document.getElementById(rf).innerHTML = document.getElementById("Q"+i+"CALC").value;
}
tableToExcel('hidTable', 'Analysis Results');
}
var tableToExcel = (function() {
var uri = 'data:application/vnd.ms-excel;base64,'
, template = '<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>{worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body><table>{table}</table></body></html>'
, base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
, format = function(s, c) { return s.replace(/{(\w+)}/g, function(m, p) { return c[p]; }) }
return function(table, name) {
if (!table.nodeType) table = document.getElementById(table)
var ctx = {worksheet: name || 'Worksheet', table: table.innerHTML}
window.location.href = uri + base64(format(template, ctx))
}
})()
</script>
<title>HTML Form Data to Excel</title>
<style type="text/css" media="screen">
.divCenMid{font-family:Arial,sans-serif;font-size:14pt;font-style:normal;font-weight:700;text-align:center;vertical-align:middle;margin:0;}
.allbdrCenMid{border:.75pt solid windowtext;color:#000;font-family:Arial,sans-serif;font-size:10pt;font-style:normal;font-weight:400;text-align:center;vertical-align:middle;margin:0;}
.allbdrCenTop{border:.75pt solid windowtext;color:#000;font-family:Arial,sans-serif;font-size:10pt;font-style:normal;font-weight:400;text-align:center;vertical-align:top;margin:0;}
.allbdrLtMid{border:.75pt solid windowtext;color:#000;font-family:Arial,sans-serif;font-size:10pt;font-style:normal;font-weight:400;text-align:left;vertical-align:middle;margin:0;}
.allbdrLtTop{border:.75pt solid windowtext;color:#000;font-family:Arial,sans-serif;font-size:10pt;font-style:normal;font-weight:400;text-align:left;vertical-align:top;margin:0;}
</style>
</head>
<body>
<table width= "565px" cellspacing="0" cellpadding="0" style="border-spacing:0;" id="QMSTable">
<col width="25px"/>
<col width="120px"/>
<col width="360px"/>
<col width="60px"/>
<tr>
<td class="divCenMid" colspan = "4"> QMS Assessment</td>
</tr>
<tr>
<td class="allbdrCenMid"> No</td>
<td class="allbdrCenMid"> Criteria</td>
<td class="allbdrLtMid"> Question</td>
<td class="allbdrCenMid"> Score</td>
</tr>
<tr>
<td class="allbdrCenTop"> Q1</td>
<td class="allbdrLtTop"> Quality Unit Independency</td>
<td class="allbdrLtTop"> Do you have the Quality Unit?</td>
<td class="allbdrCenMid">
<input id="Q1CALC" type="text" value="" class="nobdrCenMid" style="overflow:hidden; width:93% " name="Q1CALC"/>
</td>
</tr>
<tr>
<td class="allbdrCenTop"> Q2</td>
<td class="allbdrLtTop"> Apply PICS GMP</td>
<td class="allbdrLtTop"> Which GMP regulation do you use?</td>
<td class="allbdrCenMid">
<input id="Q2CALC" type="text" value="" class="nobdrCenMid" style="overflow:hidden; width:93% " name="Q2CALC"/>
</td>
</tr>
<tr>
<td class="allbdrCenTop"> Q3</td>
<td class="allbdrLtTop"> Deviation or Non-conformance</td>
<td class="allbdrLtTop"> Do you have a deviation or non-conformance procedure?</td>
<td class="allbdrCenMid">
<input id="Q3CALC" type="text" value="" class="nobdrCenMid" style="overflow:hidden; width:93% " name="Q3CALC"/>
</td>
</tr>
<tr>
<td class="allbdrCenTop"> Q4</td>
<td class="allbdrLtTop"> Complaint</td>
<td class="allbdrLtTop"> Do you have a customer complaint procedure?</td>
<td class="allbdrCenMid">
<input id="Q4CALC" type="text" value="" class="nobdrCenMid" style="overflow:hidden; width:93% " name="Q4CALC"/>
</td>
</tr>
</table>
<div id="hidTable" style="display: none">
<table id="testTable">
<caption>Supplier Risk Analysis</caption>
<colgroup></colgroup>
<colgroup></colgroup>
<colgroup></colgroup>
<thead>
<tr>
<th>No.</th>
<th>Question</th>
<th>Score</th>
</tr>
</thead>
<tbody>
<tr>
<td>Q1</td>
<td>Do you have the Quality Unit?</td>
<td id="htqf1">-</td>
</tr>
<tr>
<td>Q2</td>
<td>Apply PICS GMP?</td>
<td id="htqf2">-</td>
</tr>
<tr>
<td>Q3</td>
<td>Do you have a deviation or non-conformance procedure?</td>
<td id="htqf3">-</td>
</tr>
<tr>
<td>Q4</td>
<td>Do you have a customer complaint procedure?</td>
<td id="htqf4">-</td>
</tr>
</tbody>
</table>
</div>
<input type="button" onclick="fillHidTable()" value="Export Data to Excel">
<br />
<br />
<div>
<a href="#" id="xx" style="text-decoration:none;color:#000;background-color:#ddd;border:1px solid #ccc;padding:8px;">Export Table data into Excel</a>
</div>
</body>
</html>
