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northcoder-repo/excel_add_sheets.htm

Created April 13, 2021 21:31
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Example using DataTables to export multiple tables to Excel sheets.
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excel_add_sheets.htm
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>Demo</title>
<script type="text/javascript" src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/1.10.23/js/jquery.dataTables.min.js"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.23/css/jquery.dataTables.min.css"/>
<link rel="stylesheet" type="text/css" href="https://datatables.net/media/css/site-examples.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/buttons/1.6.5/css/buttons.dataTables.min.css"/>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jszip/2.5.0/jszip.min.js"></script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.1.36/vfs_fonts.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/buttons/1.6.5/js/dataTables.buttons.min.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/buttons/1.6.5/js/buttons.html5.min.js"></script>
</head>
<body>
<div style="margin: 20px;">
<table id="example" class="display nowrap" width="100%">
<thead>
<tr>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Name</th>
<th>Position</th>
<th>Office</th>
<th>Age</th>
<th>Start date</th>
<th>Salary</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Tiger Nixon</td>
<td>System Architect</td>
<td>Edinburgh</td>
<td>61</td>
<td>2011/04/25</td>
<td>$3,120</td>
</tr>
<tr>
<td>Garrett Winters</td>
<td>Director</td>
<td>Edinburgh</td>
<td>63</td>
<td>2011/07/25</td>
<td>$5,300</td>
</tr>
<tr>
<td>Ashton Cox</td>
<td>Technical Author</td>
<td>San Francisco</td>
<td>66</td>
<td>2009/01/12</td>
<td>$4,800</td>
</tr>
</tbody>
</table>
<hr/>
<table id="example2" class="display nowrap" width="100%" data-rowonetitle="My Sheet2" data-sheetname="Summary2">
<thead>
<tr>
<th>Name</th>
<th>Notes</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Name</th>
<th>Notes</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Big Column Test 1</td>
<td>Notes 1</td>
</tr>
<tr>
<td>Test 2</td>
<td>Notes 2</td>
</tr>
</tbody>
</table>
<hr/>
<table id="example3" class="display nowrap" width="100%" data-rowonetitle="My Sheet3" data-sheetname="Summary3">
<thead>
<tr>
<th>TABLE 3</th>
<th>Notes</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Comments </th>
<th>Notes</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Test 1</td>
<td>Notes 1</td>
</tr>
<tr>
<td>Test 2</td>
<td>Notes 2</td>
</tr>
</tbody>
</table>
<table id="example4" class="display nowrap" width="100%" data-rowonetitle="My Sheet4" data-sheetname="Summary4">
<thead>
<tr>
<th>TABLE 4</th>
<th>Notes</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Comments </th>
<th>Notes</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Test 1</td>
<td>Notes 1</td>
</tr>
<tr>
<td>Test 2</td>
<td>Notes 2</td>
</tr>
</tbody>
</table>
<table id="example5" class="display nowrap" width="100%" data-rowonetitle="My Sheet5" data-sheetname="Summary5">
<thead>
<tr>
<th>TABLE 5</th>
<th>Notes</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Comments </th>
<th>Notes</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Test 1</td>
<td>Notes 1</td>
</tr>
<tr>
<td>Test 2</td>
<td>Notes 2</td>
</tr>
</tbody>
</table>
<table id="example6" class="display nowrap" width="100%" data-rowonetitle="My Sheet6" data-sheetname="Summary6">
<thead>
<tr>
<th>TABLE 6</th>
<th>Notes</th>
</tr>
</thead>
<tfoot>
<tr>
<th>Comments </th>
<th>Notes</th>
</tr>
</tfoot>
<tbody>
<tr>
<td>Test 1</td>
<td>Notes 1</td>
</tr>
<tr>
<td>Test 2</td>
<td>Notes 2</td>
</tr>
</tbody>
</table>
</div>
<script>
//
// Based on example from:
// http://live.datatables.net/kuyayeto/9/edit
// which in turn is based on example from:
// https://datatables.net/forums/discussion/49457
// modified by me to process additional tables in a loop.
//
$(document).ready( function () {
function getHeaderNames(table) {
// Gets header names.
//params:
// table: table ID.
//Returns:
// Array of column header names.
var header = $(table).DataTable().columns().header().toArray();
var names = [];
header.forEach(function(th) {
names.push($(th).html());
});
return names;
}
function buildCols(data) {
// Builds cols XML.
//To do: define widths for each column.
//Params:
// data: row data.
//Returns:
// String of XML formatted column widths.
var cols = '<cols>';
for (i=0; i<data.length; i++) {
colNum = i + 1;
cols += '<col min="' + colNum + '" max="' + colNum + '" width="20" customWidth="1"/>';
}
cols += '</cols>';
return cols;
}
function buildRow(data, rowNum, styleNum) {
// Builds row XML.
//Params:
// data: Row data.
// rowNum: Excel row number.
// styleNum: style number or empty string for no style.
//Returns:
// String of XML formatted row.
var style = styleNum ? ' s="' + styleNum + '"' : '';
var row = '<row r="' + rowNum + '">';
for (i=0; i<data.length; i++) {
colNum = (i + 10).toString(36).toUpperCase(); // Convert to alpha
var cr = colNum + rowNum;
row += '<c t="inlineStr" r="' + cr + '"' + style + '>' +
'<is>' +
'<t>' + data[i] + '</t>' +
'</is>' +
'</c>';
}
row += '</row>';
return row;
}
function getTableData(table, title) {
// Processes Datatable row data to build sheet.
//Params:
// table: table ID.
// title: Title displayed at top of SS or empty str for no title.
//Returns:
// String of XML formatted worksheet.
var header = getHeaderNames(table);
var table = $(table).DataTable();
var rowNum = 1;
var mergeCells = '';
var ws = '';
ws += buildCols(header);
ws += '<sheetData>';
if (title.length > 0) {
ws += buildRow([title], rowNum, 51);
rowNum++;
mergeCol = ((header.length - 1) + 10).toString(36).toUpperCase();
mergeCells = '<mergeCells count="1">'+
'<mergeCell ref="A1:' + mergeCol + '1"/>' +
'</mergeCells>';
}
ws += buildRow(header, rowNum, 2);
rowNum++;
// Loop through each row to append to sheet.
table.rows().every( function ( rowIdx, tableLoop, rowLoop ) {
var data = this.data();
// If data is object based, then it needs to be converted
// to an array before sending to buildRow()
ws += buildRow(data, rowNum, '');
rowNum++;
} );
ws += '</sheetData>' + mergeCells;
return ws;
}
function setSheetName(xlsx, name) {
// Changes tab title for sheet.
//Params:
// xlsx: xlxs worksheet object.
// name: name for sheet.
if (name.length > 0) {
var source = xlsx.xl['workbook.xml'].getElementsByTagName('sheet')[0];
source.setAttribute('name', name);
}
}
function addSheet(xlsx, table, title, name, sheetId) {
//Clones sheet from Sheet1 to build new sheet.
//Params:
// xlsx: xlsx object.
// table: table ID.
// title: Title for top row or blank if no title.
// name: Name of new sheet.
// sheetId: string containing sheetId for new sheet.
//Returns:
// Updated sheet object.
//Add sheet2 to [Content_Types].xml => <Types>
//============================================
var source = xlsx['[Content_Types].xml'].getElementsByTagName('Override')[1];
var clone = source.cloneNode(true);
clone.setAttribute('PartName','/xl/worksheets/sheet' + sheetId + '.xml');
xlsx['[Content_Types].xml'].getElementsByTagName('Types')[0].appendChild(clone);
//Add sheet relationship to xl/_rels/workbook.xml.rels => Relationships
//=====================================================================
var source = xlsx.xl._rels['workbook.xml.rels'].getElementsByTagName('Relationship')[0];
var clone = source.cloneNode(true);
clone.setAttribute('Id','rId'+sheetId+1);
clone.setAttribute('Target','worksheets/sheet' + sheetId + '.xml');
xlsx.xl._rels['workbook.xml.rels'].getElementsByTagName('Relationships')[0].appendChild(clone);
//Add second sheet to xl/workbook.xml => <workbook><sheets>
//=========================================================
var source = xlsx.xl['workbook.xml'].getElementsByTagName('sheet')[0];
var clone = source.cloneNode(true);
clone.setAttribute('name', name);
clone.setAttribute('sheetId', sheetId);
clone.setAttribute('r:id','rId'+sheetId+1);
xlsx.xl['workbook.xml'].getElementsByTagName('sheets')[0].appendChild(clone);
//Add sheet2.xml to xl/worksheets
//===============================
var newSheet = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'+
'<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:x14ac="http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac" mc:Ignorable="x14ac">'+
getTableData(table, title) +
'</worksheet>';
xlsx.xl.worksheets['sheet' + sheetId + '.xml'] = $.parseXML(newSheet);
}
var table = $('#example').DataTable({
dom: 'Bftrip',
buttons: [
{
extend: 'excelHtml5',
text: 'Excel',
customize: function( xlsx ) {
setSheetName(xlsx, 'Employees');
// process additional DataTables in the web page:
$('table').each(function( index ) {
if ( index > 0 ) {
var tableID = '#' + $( this ).attr('id');
var rowOneTitle = $( this ).attr('data-rowonetitle');
var sheetName = $( this ).attr('data-sheetname');
var sheetID = index + 1;
addSheet(xlsx, tableID, rowOneTitle, sheetName, sheetID);
}
});
}
}
]
});
$('#example2').DataTable();
$('#example3').DataTable();
$('#example4').DataTable();
$('#example5').DataTable();
$('#example6').DataTable();
} );
</script>
</body>
</html>
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