如果src = pdf，如何从IFRAME打印PDF？ [英] How to print PDF from IFRAME if src = pdf?

问题描述

我有一个iframe需要直接指向PDF文件（不是带PDF的页面）：

I have an iframe which needs point directly to a PDF file (not a page with a PDF):

<iframe id="ecard-pdf" name="ecard-pdf" style="position: absolute;" src="/profile.pdf">
</iframe>

我希望能够在此iFrame中打印PDF

I want to be able to print the PDF in this iFrame

我在其他问题中找到了几个不符合我需求的解决方案：

I have found several solutions in other questions that do not fit my needs:

1. 要求在iframe（
   https://stackoverflow.com/a/473270/1246369 ）


2. 建议聚焦框架，然后对其执行打印操作（
   https://stackoverflow.com/a / 9616706/1246369 ）


3. 访问iframe的contentWindow并将其打印出来（
   https://stackoverflow.com/a/9617566/1246369 ）


4. 这些的变化

1. Require to have a function in the iframe ( https://stackoverflow.com/a/473270/1246369 )
2. Suggest focusing the frame and then performing print action on it ( https://stackoverflow.com/a/9616706/1246369 )
3. Access contentWindow of the iframe and print it ( https://stackoverflow.com/a/9617566/1246369 )
4. Variations of those

然而，如果iframe的src直接指向PDF而不是指向围绕PDF的页面，似乎FireFox和IE无法执行此操作。

However, it seems that FireFox and IE can't do this if the iframe's src points directly to a PDF and not to a page wrapped around the PDF.

Firefox ：

而不是打印时，它会显示以下对话框：使用确定和取消按钮显示此页面防止此页面创建其他对话，这两个按钮都不打印PDF。

Instead of printing, it displays this dialog: "Prevent this page from creating additional dialogues" with "OK" and "Cancel" buttons, neither of which prints the PDF.

IE ：

只是忽略了我使用上述方法进行打印的尝试。

just ignores my attempts to print using the above methods.

问题：

我怎样才能让用户在iFrame中打印PDF，无论他们使用什么浏览器？

How can I allow users to print the PDF in the iFrame no matter what browser they are using?

推荐答案

我一直在努力寻找适用于IE和Chrome的解决方案。这对我有用：

I have struggled a bit to find a solution that works for both IE and Chrome. This works for me:

$(function() {
    var ua = window.navigator.userAgent;
    var msie = ua.indexOf('MSIE ');
    var trident = ua.indexOf('Trident/');
    var edge = ua.indexOf('Edge/');
    var url = '/url/to/file.pdf';
    var pdf ='';
    var style = 'position:fixed; top:0px; left:0px; bottom:0px; right:0px; width:100%; height:100%; border:none; margin:0; padding:0; overflow:hidden;';

    if(msie > 0 || trident > 0 || edge > 0){
        pdf = '<object data="' + url + '" name="print_frame" id="print_frame" style="' + style + '" type="application/pdf">';
    }
    else{
        pdf ='<iframe src="' + url + '" name="print_frame" id="print_frame" style="' + style + '"></iframe>';
    }

    $(document.body).append(pdf);

    setTimeout(function(){
        window.frames["print_frame"].focus();
        window.frames["print_frame"].print();
    },2000);
});

...干杯。

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