dotnetN00b dotnetN00b - 1 month ago 17
HTML Question

How do I export multiple html tables to excel?

I have a webpage that has 3 tables and I'd like to export all 3 of them to same excel file. I'd like each table in its own sheet, but having them all on the same sheet is ok as well. After some googling, all I've seen is exporting one table to one excel sheet.

Answer
var tablesToExcel = (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>'
    , templateend = '</x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head>'
    , body = '<body>'
    , tablevar = '<table>{table'
    , tablevarend = '}</table>'
    , bodyend = '</body></html>'
    , worksheet = '<x:ExcelWorksheet><x:Name>'
    , worksheetend = '</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet>'
    , worksheetvar = '{worksheet'
    , worksheetvarend = '}'
    , base64 = function (s) { return window.btoa(unescape(encodeURIComponent(s))) }
    , format = function (s, c) { return s.replace(/{(\w+)}/g, function (m, p) { return c[p]; }) }
    , wstemplate = ''
    , tabletemplate = '';

    return function (table, name, filename) {
        var tables = table;

        for (var i = 0; i < tables.length; ++i) {
            wstemplate += worksheet + worksheetvar + i + worksheetvarend + worksheetend;
            tabletemplate += tablevar + i + tablevarend;
        }

        var allTemplate = template + wstemplate + templateend;
        var allWorksheet = body + tabletemplate + bodyend;
        var allOfIt = allTemplate + allWorksheet;

        var ctx = {};
        for (var j = 0; j < tables.length; ++j) {
            ctx['worksheet' + j] = name[j];
        }

        for (var k = 0; k < tables.length; ++k) {
            var exceltable;
            if (!tables[k].nodeType) exceltable = document.getElementById(tables[k]);
            ctx['table' + k] = exceltable.innerHTML;
        }

        //document.getElementById("dlink").href = uri + base64(format(template, ctx));
        //document.getElementById("dlink").download = filename;
        //document.getElementById("dlink").click();

        window.location.href = uri + base64(format(allOfIt, ctx));

    }
})();

And the HTML

<html>
    <head>
        <title>JS to Excel</title>

    </head>
    <body>
        <table id="1">
            <tr><td>Hi</td></tr>
            <tr><td>Hey</td></tr>
            <tr><td>Hello</td></tr>
        </table>
        <table id="2">
            <tr><td>Night</td></tr>
            <tr><td>Evening</td></tr>
            <tr><td>Nite</td></tr>
        </table>

        <a id="dlink"  style="display:none;"></a>
        <input type="button" onclick="tablesToExcel(['1', '2'], ['first', 'second'], 'myfile.xls')" value="Export to Excel">
        <script src="~/Views/JS/JSExcel.js" type="text/javascript"></script>
    </body>
</html>

NOTE: this doesn't work on IE ('data too small' error) and on Firefox both tables are put on the same sheet.

Credit also to this thread - HTML Table to Excel Javascript