Error when changing the password

[ran.li]

Hi Support,

I'm trying to create a function to change the password of pdf files but I get the error saying "The file is being used by another process". The file is not opened anywhere else so I suspect the spire.pdf itself that locks the file the first time when the password is added. Here is the code:

Code: Select all

 PdfDocument doc = new PdfDocument();
            doc.LoadFromFile(filePath, "Kanteen779");
            doc.Security.OwnerPassword = "Kanteen779";
            doc.Security.UserPassword = "Password1";
            //doc.Security.Permissions = 0;
            doc.SaveToFile(filePath);
            doc.Close();
            doc.Dispose();


Any idea how to fix this?

[Betsy.jiang]

Dear ran.li,

Thanks for your inquiry.
Please check again if another process opens the file.
I created a sample file manually and then used the latest Spire.PDF Pack(Hot Fix) Version:3.9.285 to have a test, everything worked fine. So I firstly suggest using this version. If the issue still happens, please provide the input file for further investigation.

Sincerely,
Betsy
E-iceblue support team

[ran.li]

Hi Betsy,

I have resolved this issue by using file stream instead. The code is here just in case anyone else comes across with this issue.

Code: Select all

using (FileStream stream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite))
            {
                PdfDocument doc = new PdfDocument();
                doc.LoadFromStream(stream, "Kanteen779");
                doc.Security.OwnerPassword = "Kanteen779";
                doc.Security.UserPassword = "Password1";
                //doc.Security.Permissions = 0;
                doc.SaveToStream(stream);
                doc.Close();
                doc.Dispose();

                stream.Close();
                stream.Dispose();
            }

Thanks,
Ran

[Betsy.jiang]

Dear Ran,

Thanks for sharing.
Please feel free to contact us if you have any question

Sincerely,
Betsy
E-iceblue support team