Open pdf with password c#

C using Syncfusion. Parsing; using Syncfusion. Imports Syncfusion. Parsing Imports Syncfusion. CopyContent PdfPermissionsFlags. Save "Security. Start "Security. Note: Starting with v Free Trial. Did you find this information helpful? I agree to the creation of a Syncfusion account in my name and to be contacted regarding this message.

Please see our Privacy policy and Cookie Policy. The following steps show how to unlock the PDF file by removing its password using C. The following C code snippet unlocks the PDF file by removing its existing password, hence anyone can access it without authorization.

We started with the simple PDF document and added password protection. Then we changed the existing password of that PDF file. In the end, we learned how to remove the password of our PDF documents. Now you can jump to build your own password protector or password remover application using the. To learn more about GroupDocs. NET, visit the documentation.

For queries, contact us via the forum. You can get a free temporary license to use the API without the evaluation limitations. This entry was posted in GroupDocs. Active Oldest Votes. Community Bot 1 1 1 silver badge. Ekk Ekk 5, 17 17 silver badges 27 27 bronze badges. Thanks for your post.

If I used this function, the pdf file has been removed the password. So users can save in their local drive and they can open anytime without password. Actually I don't want to remove password. After open the pdf, they can save but after they saved when they open the pdf again, they need to put password.

If I understand you correctly you want to enforce some digital rights management DRM. Sign up or log in Sign up using Google. Sign up using Facebook.

Sign up using Email and Password. Post as a guest Name. If the PDF file does not require a password, use a constructor without a decryption handler parameter. Pdf library will open the document with "user" restricted permissions. Use the same constructor if you want to open a secured PDF file with "owner" unrestricted permissions. The following code snippet shows how to open a password-protected PDF file in C :. PDF documents encrypted using certificates require a matching certificate to open them.

There may be more than one matching certificate for a PDF file. The author of the encrypted PDF document may grant different permissions for different matching certificates. If you have a matching certificate installed in the current user's X. Pdf library will use the first matching certificate from the certificate store and use the certificate to open the document.