我想使用角度6将我的HTML页面导出为pdf。我已编写以下代码转换为pdf
let dataPdf = document.getElementById('contentToPrint');
const pdf = new jspdf('p', 'pt', 'a4');
pdf.addHTML(document.getElementById('contentToPrint'),()=>{
pdf.save('web.pdf');
});
获得以下错误:
core.js:12301 ERROR Error: Supplied Data is not a valid base64-String jsPDF.convertStringToImageData
at Object.x.convertStringToImageData (jspdf.min.js:50)
at Object.x.addImage (jspdf.min.js:50)
at Object.<anonymous> (jspdf.min.js:188)
at Object.options.complete (html2canvas.js:2711)
at start (html2canvas.js:2215)
at Object._html2canvas.Preload (html2canvas.js:2488)
at html2canvas.js:2719
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
at Object.onInvokeTask (core.js:13842)
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)
您需要将图像转换为base64。
如果你的图像是静态的,你可以在这里转换它们:https://www.base64-image.de/ 如果图像是动态的:Converting an image to base64 in angular 2
将图像转换为base64字符串后,您可以将其传递给jsPDf:
pdf.addHTML('your base64 string);
我面临着类似的问题。
看起来您需要将DOM元素转换为PNG。一旦你拥有它,你必须将它转换为base64字符串并添加pdf.addImage()
您可以使用html2canvas
将DOM元素转换为图像。
let dataPdf = document.getElementById('contentToPrint');
const pdf = new jspdf('p', 'pt', 'a4');
html2canvas(dataPdf).then((canvas) => {
let img = canvas.toDataURL('image/png');
pdf.addImage(img, 'png', 40, 90, 515, 600); //sizings here
pdf.save('web.pdf');
}
你可以做这样的事情
import html2canvas from 'html2canvas';
var data = document.getElementById('ELEMENT_ID');
html2canvas(data).then(canvas => {
var imgWidth = 208;
var pageHeight = 295;
var imgHeight = canvas.height * imgWidth / canvas.width;
var heightLeft = imgHeight;
const contentDataURL = canvas.toDataURL('image/png')
let pdf = new jspdf('p', 'mm', 'a4'); // A4 size page of PDF
var position = 0;
pdf.addImage(contentDataURL, 'PNG', 0, position, imgWidth, imgHeight)
//save file with specific name
pdf.save("Wallet.pdf");
});