如何禁用PDF文档的“另存为”选项 [英] How to disable Save As option for a PDF document
本文介绍了如何禁用PDF文档的“另存为”选项的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何禁用保存PDF文档
解决方案
为什么要禁用它?即使你这样做了,你仍然可以使用其他方法下载PDF。
你好 解决方案使用这些代码
使用(MemoryStream输入= 新 MemoryStream(renderedBytes))
{
使用(MemoryStream输出= 新 MemoryStream())
{
PdfReader reader = new PdfReader(输入);
reader.AddViewerPreference(PdfName.HIDEMENUBAR,PdfName.NONE);
// PdfEncryptor.Encrypt(reader,output,true,CertificatePassword,CertificatePassword,PdfWriter.ALLOW_SCREENREADERS);
PdfEncryptor.Encrypt(reader,output, true , null , null ,PdfWriter.ALLOW_PRINTING | PdfWriter.AllowPrinting | PdfWriter.ENCRYPTION_AES_128 | PdfWriter.CenterWindow);
renderedBytes = output.ToArray();
Response.ContentType = application / pdf;
}
} i
How to disable Save a PDF document
解决方案
Why would you want to disable it? Even if you did, you could still download the PDF using other methods.
Hi here is the solution use these code using (MemoryStream input = new MemoryStream(renderedBytes)) { using (MemoryStream output = new MemoryStream()) { PdfReader reader = new PdfReader(input); reader.AddViewerPreference(PdfName.HIDEMENUBAR, PdfName.NONE); // PdfEncryptor.Encrypt(reader, output, true, CertificatePassword, CertificatePassword, PdfWriter.ALLOW_SCREENREADERS); PdfEncryptor.Encrypt(reader, output, true, null, null, PdfWriter.ALLOW_PRINTING | PdfWriter.AllowPrinting | PdfWriter.ENCRYPTION_AES_128 | PdfWriter.CenterWindow); renderedBytes = output.ToArray(); Response.ContentType = "application/pdf"; } }"i
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