下載 PDF 格式的 HTML 表格

Question

在過去的 3 天里，我一直試圖解決這個問題，但一直得到相同的結果......

我有一個使用 JavaScript 完成的 HTML 表格。

HTML

<div id="tb_container">
    <table id="tb_Logbook" class="table table-striped" onload="LoadPilotLogBook()">
        <thead>
            <tr>
              <th><center>DATE</center></th>
              <th colspan="2">DEPARTURE</th>
              <th colspan="2">ARRIVAL</th>
              <th colspan="2">AIRCRAFT</th>
              <th colspan="2">SINGLE PILOT FLIGHT TIME</th>
              <th>MULTI-PILOT</th>
              <th>TOTAL TIME</th>
              <th>NAME OF</th>
              <th colspan="2">LANDINGS</th>
              <th>APPROACH</th>
              <th colspan="2">OPERATIONAL CONDITION TIME</th>
              <th colspan="4">PILOT FUNCTION TIME</th>
              <th colspan="3">FLIGHT SIM TRAINING</th>
              <th>REMARKS AND</th>
              <th colspan="2">ACTIONS</th>
            </tr>
            <tr>
              <th><center>dd/mm/yyyy</center></th>
              <th>Place</th>
              <th>Time</th>
              <th>Place</th>
              <th>Time</th>
              <th>Model</th>
              <th>Registration</th>
              <th>SE</th>
              <th>ME</th>
              <th>FLIGHT TIME</th>
              <th>OF FLIGHT</th>
              <th>Pilot in command</th>
              <th>Day</th>
              <th>Night</th>
              <th>IFR</th>
              <th>Night</th>
              <th>IFR</th>
              <th>PIC</th>
              <th>Co-Pilot</th>
              <th>Dual</th>
              <th>Instructor</th>
              <th>Date</th>
              <th>Type</th>
              <th>Time</th>
              <th>ENDORSMENTS</th>
              <th>EDIT</th>
              <th>SUPPR</th>
            </tr>
        </thead>
        <tbody>
            //AutoGenerated via JS 
        </tbody>
        </table>
    </div>

我已經包含了所有這些文件：

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/0.9.0rc1/jspdf.min.js"></script>
<script src="https://rawgit.com/someatoms/jsPDF-AutoTable/master/dist/jspdf.plugin.autotable.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf-autotable/3.0.10/jspdf.plugin.autotable.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.0.272/jspdf.debug.js"></script>

JavaScript

    window.html2canvas = html2canvas
var doc = new jsPDF('l', 'mm', [297, 210]);
title = "Your Logbook",
source = $('#tb_container')[0];

specialElementHandlers = {

    '#bypassme': function (element, renderer) {

        return true
    }
};



margins = {
    top: 100,
    bottom: 10,
    left: 10,
    right: 10
};

$('#cmd').click(function () {

doc.addHTML($('#tb_Logbook')[0], function () {
    title,
    source,
    margins.left, 
    margins.top, { 
        'width': margins.width, 
        'elementHandlers': specialElementHandlers
    },
 doc.save('LOGBOOK_' + userLastName + '_' + userFirstName + '.pdf');
 });


});

當我單擊按鈕導出為 PDF 時，我得到了這個文件：

我現在真的不知道如何處理這個問題。

謝謝你的幫助 ！

Answer 1

您還可以使用 jsPDFhtml PlugIn ， 替代addHtml() 。 我找不到html2canvas 1.0.0-alpha.12的 CDN，所以我無法在這里制作代碼片段。 以下代碼對我有用。 並且pdf內容可搜索且更清晰。 不過，您可能需要調整頁面的大小。

<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.5.3/jspdf.debug.js" integrity="sha384-NaWTHo/8YCBYJ59830LTz/P4aQZK1sS0SneOgAvhsIl3zBu8r9RevNg5lHCHAuQ/"
    crossorigin="anonymous"></script>
<script src="https://html2canvas.hertzen.com/dist/html2canvas.min.js"></script><!-- html2canvas 1.0.0-alpha.11 or higher version is needed -->
<script>
    function download() {
        let pdf = new jsPDF('l', 'pt', [1920, 640]);
        pdf.html(document.getElementById('tb_Logbook'), {
            callback: function (pdf) {
                pdf.save('test.pdf');
            }
        });
    }
</script>

Answer 2

您只是缺少background-color:white 。 我認為問題是 html2canvas 為您提供了一個透明的 png 圖像，而 JsPDF 會將其轉換為 jpg。 所以所有的透明像素都轉換為黑色。

簡而言之，嘗試將 body, html, table background-color為white 。

 window.html2canvas = html2canvas var doc = new jsPDF('l', 'mm', [297, 210]); title = "Your Logbook", source = $('#tb_container')[0]; specialElementHandlers = { '#bypassme': function (element, renderer) { return true } }; margins = { top: 100, bottom: 10, left: 10, right: 10 }; $('#cmd').click(function () { doc.addHTML($('#tb_Logbook')[0], function () { title, source, margins.left, margins.top, { 'width': margins.width, 'elementHandlers': specialElementHandlers }, doc.save('LOGBOOK_.pdf'); }); });

 *, html, body, table{ background-color:white; width:100%; } #cmd{ border:1px solid blue; color:white; background-color:lightblue; padding:10px; border-radius:5px; width:200px; text-align:center; cursor:pointer; }

 <script src="https://code.jquery.com/jquery-1.12.4.js"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/0.9.0rc1/jspdf.min.js"></script> <script src="https://rawgit.com/someatoms/jsPDF-AutoTable/master/dist/jspdf.plugin.autotable.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf-autotable/3.0.10/jspdf.plugin.autotable.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/0.4.1/html2canvas.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.0.272/jspdf.debug.js"></script> <div class="cmd" id="cmd">Click to Export</div> <div id="tb_container"> <table id="tb_Logbook" class="table table-striped" onload="LoadPilotLogBook()"> <thead> <tr> <th><center>DATE</center></th> <th colspan="2">DEPARTURE</th> <th colspan="2">ARRIVAL</th> <th colspan="2">AIRCRAFT</th> <th colspan="2">SINGLE PILOT FLIGHT TIME</th> <th>MULTI-PILOT</th> <th>TOTAL TIME</th> <th>NAME OF</th> <th colspan="2">LANDINGS</th> <th>APPROACH</th> <th colspan="2">OPERATIONAL CONDITION TIME</th> <th colspan="4">PILOT FUNCTION TIME</th> <th colspan="3">FLIGHT SIM TRAINING</th> <th>REMARKS AND</th> <th colspan="2">ACTIONS</th> </tr> <tr> <th><center>dd/mm/yyyy</center></th> <th>Place</th> <th>Time</th> <th>Place</th> <th>Time</th> <th>Model</th> <th>Registration</th> <th>SE</th> <th>ME</th> <th>FLIGHT TIME</th> <th>OF FLIGHT</th> <th>Pilot in command</th> <th>Day</th> <th>Night</th> <th>IFR</th> <th>Night</th> <th>IFR</th> <th>PIC</th> <th>Co-Pilot</th> <th>Dual</th> <th>Instructor</th> <th>Date</th> <th>Type</th> <th>Time</th> <th>ENDORSMENTS</th> <th>EDIT</th> <th>SUPPR</th> </tr> </thead> <tbody> //AutoGenerated via JS </tbody> </table> </div>

你也可以在這里測試你的這個答案