从Windows 8应用程序打印PDF文档
我正在尝试将Windows 8应用程序中的PDF文件打印到连接的打印机。我正在用WinJS编码，我知道我必须创建一个打印任务才能从Windows8应用程序启动打印。因此，在查看文档后，我有以下代码：从Windows 8应用程序打印PDF文档,pdf,windows-8,winjs,windows-8.1,Pdf,Windows 8,Winjs,Windows 8.1,我正在尝试将Windows 8应用程序中的PDF文件打印到连接的打印机。我正在用WinJS编码，我知道我必须创建一个打印任务才能从Windows8应用程序启动打印。因此，在查看文档后，我有以下代码： onPrintTaskRequested: function (e) { var self = Application.navigator.pageControl, printTask = e.request.createPrintTask("Print T
onPrintTaskRequested: function (e) {
var self = Application.navigator.pageControl,
printTask = e.request.createPrintTask("Print Test Doc", function (args) {
args.setSource(MSApp.getHtmlPrintDocumentSource(document));
// Register the handler for print task completion event
printTask.oncompleted = self.onPrintTaskCompleted;
});
}
显然，我不能简单地将getHtmlPrintDocumentSource的参数设置为.PDF或.PNG二进制文件。所以，我很好奇：WinJS库是否提供了一种打印方法，以便我可以将PDF文件打印到连接的打印机上？有人能提供一些实现的技巧吗？据我所知，
MSApp.getHtmlPrintDocumentSource（document）比如说。免责声明：我目前为开发该库的公司工作经过反复试验，我终于能够从Windows 8应用程序中打印代表PDF二进制文件的Base64流 我正在用HTML/CSS/WinJS编写应用程序。基本上，这里简要说明了它是如何实现的： 在
default.html<body role="application" class="app">
<canvas id="pdf-render-output"></canvas>
.
.
.
</body>
body > canvas {
display: none;
}
.
. /* all your app's default css styles */
.
@media print {
body > * {
display:none;
max-width: 100%;
}
html {
max-width: 100%;
border-top-color: none;
border-top: 0;
}
body > canvas {
display: block;
border: none;
max-width: 100%;
width: 100%;
height: 100%;
position: relative;
}
}
//Define a container for the Base64 data we'll use with PDF.js
var pdfPrintData = {};
//Function to render PDF to canvas and begin printing contract with Windows 8 OS
printPrescription: function () {
var self = Application.navigator.pageControl,
printManager = Windows.Graphics.Printing.PrintManager.getForCurrentView();
self.getPDF().done(function () {
var pdfStream = pdfPrintData.base64,
pdfFile = convertDataURIToBinary(pdfStream);
PDFJS.disableWorker = true;
PDFJS.getDocument(pdfFile).then(function (pdf) {
var numPages = pdf.numPages,
renderCanvas = $('#pdf-render-output')[0];
//setup canvas
renderCanvas.height = pdf.getPage(1).data.getViewport(1).height;
renderCanvas.width = pdf.getPage(1).data.getViewport(1).width;
//Setup a render context for pdf.js to out a pdf file to the canvas.
var renderContext = {
canvasContext: renderCanvas.getContext('2d'),
viewport: pdf.getPage(1).data.getViewport(1)
};
//Bring up Windows 8 OS print after PDF is rendered to render context.
pdf.getPage(1).data.render(renderContext).then(function () {
printManager.onprinttaskrequested = self.onPrintTaskRequested;
Windows.Graphics.Printing.PrintManager.showPrintUIAsync();
});
})
});
},
onPrintTaskRequested: function (e) {
var self = Application.navigator.pageControl,
printTask = e.request.createPrintTask("Print Prescription", function (args) {
args.setSource(MSApp.getHtmlPrintDocumentSource(document));
printTask.oncompleted = self.onPrintTaskCompleted;
});
},
onPrintTaskCompleted: function (e) {
if (e.completion === Windows.Graphics.Printing.PrintTaskCompletion.failed) {
console.log("[ERX] : Failed to print!");
}
}
self.getPDFpdfPrintData.Base64