我想制作不能复制pdf文件文本的pdf文件.
问题描述：
大家好，
请帮助我.....
我想制作pdf文件，但用户无法从pdf文件复制文本.他只能读.他对pdf文件无能为力.
在此先感谢....，
hi all,
please help me.....
i want to make pdf file but user cannot able to copy the text from pdf file. he can just read only. he can''t do anything with pdf file.
Thanks in advance....,
答
您可以使用 iTextSharp [ ^ ]创建受保护的pdf文件.但是请注意，如果有人可以渲染(查看)它，也可以将其保存到图像中，并使用OCR应用程序将其取回.您无法阻止这种情况，或者您实际上创建了不能以任何形式使用的pdf.
You can use iTextSharp[^] to create protected pdf file. But be aware, that if somebody can render (view) it, can also save it to image and get the text back with an OCR application. You can not prevent this, or you actually create a pdf that cannot be used in any form.