Winnovative HTML 到 PDF 转换器
我正在尝试使用 Winnovative HTML 到 PDF 转换器将 aspx 页面转换为 PDF，但在转换页面之前，我想要运行一些 javascript。我知道 javascript 可以工作，因为我已经测试了独立的 aspx 页面，而没有将其转换为 PDF。然而，当它被转换时，似乎javascript还没有运行。我已阅读 Winnovative 网站 (http://www.winnovative-software.com/FAQ.aspx) 上的常见问题解答，因此我将以下内容添加到我的代码中以确保可以允许 javascript 运行
pdfConverter.ScriptsEnabled = True
pdfConverter.InternetSecurityZone = InternetSecurityZone.LocalMachine
：代码仍然不起作用，所以我尝试注释掉我的主要 javascript 并测试一个非常简单的 javascript 来看看它是否有效。我尝试的 JavaScript 很简单：
var item = $(".items")[0];
items.style.display = "none";
具有“items”类的元素包围页面上的所有内容。当我再次生成PDF时，所有内容都如预期消失了。这意味着 JavaScript 正在运行。
然后我想知道是否可能在我的 JavaScript 有机会运行之前生成了 PDF，所以这就是看不到效果的原因。我在Winnovative网站的常见问题解答中发现PDF转换器有一个ConversionDelay属性，可用于指定在开始PDF渲染之前等待异步内容加载的额外时间段（以秒为单位）。所以我添加了以下内容：
pdfConverter.ConversionDelay = 30
即使经过此延迟，我的 javascript 仍然无法运行。有人可以提供任何指导吗？谢谢。
I'm trying to convert an aspx page to a PDF using the Winnovative HTML to PDF converter, but before the page is converted, I want some javascript to be run. I know the javascript works as I've tested the standalone aspx page without converting it to a PDF. However, when it is converted, it appears that the javascript hasn't been run. I have read the FAQs on the Winnovative website (http://www.winnovative-software.com/FAQ.aspx) and as a result I've added the following to my code to ensure javascript can be allowed to run:
pdfConverter.ScriptsEnabled = True
pdfConverter.InternetSecurityZone = InternetSecurityZone.LocalMachine
Adding this code still didn't work so I tried commenting out my main javascript and testing a very simple bit of javascript to see if that works. The javascript I tried was simply:
var item = $(".items")[0];
items.style.display = "none";
The element with a class of "items" surrounds everything on the page. When I generated the PDF again, all the contents had disappeared as expected. This means that javascript is running.
I then wondered if maybe the PDF is being generated before my javascript has had a chance to run so that's why the effects can't be seen. I found in the Winnovative website's FAQs that the PDF converter has a ConversionDelay property which can be used to specify an additional period of time in seconds to wait for asynchronous content to be loaded before starting PDF rendering. So I added the following:
pdfConverter.ConversionDelay = 30
Even after this delay, my javascript still does not run. Can anyone please offer any guidance? Thanks.
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我发现 winnovative 的另一个产品“EVO HTML to PDF Converter for .NET”可以很好地执行 javascript，它也可以与 jquery 一起使用。
这是测试页面：http://www.evopdf.com/evopdfdemo/default.aspx 我尝试使用这些 jQuery 呈现的页面成功进行转换：
jQuery Accordion（选项卡已正确呈现）
jQuery 分页（jquery 创建的页码可见）
在这两个示例中，winnovative html 到 pdf 的转换失败。
编辑：EVO 库似乎在相关脚本上存在问题，包括不以“/”开头
如果您需要链接外部脚本，您有三个选项：
使用绝对路径添加脚本引用，例如
使用
使用带有“/”的相对路径
I found that another product from winnovative "EVO HTML to PDF Converter for .NET" does a good javascript execution, it works also with jquery.
Here is the test page:http://www.evopdf.com/evopdfdemo/default.aspx and I tried the conversion successfully with these jQuery rendered pages:
jQuery Accordion (the tabs are correctly rendered)
jQuery pagination (the pages numbers created by jquery are visible)
In this two examples the winnovative html to pdf conversion fails.
EDIT: It seems that the EVO library has problem on relative scripts include not starting with "/"
If you need to link an external script you have three options:
Add a script reference using the Absolute Path like
Insert the script inside the original page using the <script> tag
Use a relative path with "/" like
此问题的一种解决方法是在浏览器上运行 JavaScript 之后保存页面源代码，然后将该 HTML 文件传递给转换器。
您可以安装适用于 Firefox 的 Web 开发人员工具栏 并使用“查看源代码 ->”查看生成的源功能可获取页面当前状态的 HTML，然后将其保存到文件中。
One workaround for this problem would be to save the page source after JavaScript has run on a browser, and then pass that HTML file to the converter.
You can install the Web Developer Toolbar for Firefox and use the View Source -> View Generated Source feature to get the HTML of the page in its current state, and then save that to a file.