如何保护在线pdf文件免于打印，复制等 [英] how to protect online pdf file from printing, copying ... etc

问题描述

我正在使用asp.net 4 c#从事知识管理解决方案的工作
我想预览pdf文件，仅供阅读，不打印，不复制，不打印屏幕，不下载，也不下载浏览器缓存

Hi,

Am working in knowledge management solution using asp.net 4 c#
I want to preview pdf files just for reading, no print no copy no print screen no download and no browser cache download

is there any way to do this ?

推荐答案

唯一的方法是不使其联机....

因为您无法阻止用户点击键盘上的打印屏幕"键或点击浏览器中的打印"菜单，所以您也无法使用保存"来阻止用户将PDF保存到他的计算机中作为''菜单选项并复制它.

达到要求的最佳方法是将数据以幻灯片的形式显示给用户.即一次仅一页.尽管这不是一种简单的方法，但是您可以想象，没有多少人会对一次复制和保存您的内容(无论多么好)感兴趣.

The only way is to not to make it online....

Because you cannot stop the user from hitting the ''Print Screen'' key on the keyboard or from hitting the ''Print'' menu in the browser , neither you can stop him from saving the PDF to his computer using the ''Save As'' menu option and copying it.

Best way to achieve your requirement is to display the data as a slide show to the user; i.e. only one page at a time. Although its not a fool proof method, but you can imagine that not much people would be interested in copying and saving your content ( however good it may be) one slide at a time.

谢谢比拉杰达尔为您提供帮助

pdf文件的内容非常重要，因此我不能依靠幻灯片技术.

thanks Birajdar for your help

the pdf file content is very important so I can''t depend on slide show technique .

有什么解决方案可以保护 PDF文件密码受保护吗?

Is there any solution to make PDF file password protected

</big> . So if user download my PDF file, it ask for password first....


Is that possible.

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