The file's security handler provides a mechanism that not only implements encryption in PDF documents, but also stores all data related to this process. The PDF specification defines two security handlers: Standard Security Handler and Public-Key Security Handler. Other applications may provide security handlers of their own.
'DeclarationPublic Function GetEncryptionMode() As PdfEncryptionMode
public PdfEncryptionMode GetEncryptionMode()
public function GetEncryptionMode(): PdfEncryptionMode;
public function GetEncryptionMode() : PdfEncryptionMode;
public: PdfEncryptionMode GetEncryptionMode();
public: PdfEncryptionMode GetEncryptionMode();
It is recommend to use the GetStat method to identify the specific reason for the method's failure, if any.
Dim caption As String = "Example: GetEncryptionMode" Dim gdpicturePDF As New GdPicturePDF() 'Please see the example in the SetPassword method for creating this file. Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("encrypted.pdf", False) If status = GdPictureStatus.OK Then Dim emode As PdfEncryptionMode = PdfEncryptionMode.UnKnown If gdpicturePDF.IsEncrypted() Then emode = gdpicturePDF.GetEncryptionMode() status = gdpicturePDF.GetStat() If status = GdPictureStatus.OK Then MessageBox.Show("This PDF document is encrypted, the security handler is: " + emode.ToString(), caption) Else MessageBox.Show("The GetEncryptionMode() method has failed with the status: " + status.ToString(), caption) End If 'You need to provide the correct password here. If gdpicturePDF.SetPassword("user") = GdPictureStatus.OK Then emode = gdpicturePDF.GetEncryptionMode() If gdpicturePDF.GetStat() = GdPictureStatus.OK Then MessageBox.Show("This PDF document has been decrypted, the security handler is: " + emode.ToString(), caption) End If End If Else emode = gdpicturePDF.GetEncryptionMode() If gdpicturePDF.GetStat() = GdPictureStatus.OK Then MessageBox.Show("The PDF document is not encrypted. The security handler is: " + emode.ToString(), caption) End If End If Else MessageBox.Show("The file can't be loaded.", caption) End If gdpicturePDF.Dispose()
string caption = "Example: GetEncryptionMode"; GdPicturePDF gdpicturePDF = new GdPicturePDF(); //Please see the example in the SetPassword method for creating this file. GdPictureStatus status = gdpicturePDF.LoadFromFile("encrypted.pdf", false); if (status == GdPictureStatus.OK) { PdfEncryptionMode emode = PdfEncryptionMode.UnKnown; if (gdpicturePDF.IsEncrypted()) { emode = gdpicturePDF.GetEncryptionMode(); status = gdpicturePDF.GetStat(); if (status == GdPictureStatus.OK) { MessageBox.Show("This PDF document is encrypted, the security handler is: " + emode.ToString(), caption); } else { MessageBox.Show("The GetEncryptionMode() method has failed with the status: " + status.ToString(), caption); } //You need to provide the correct password here. if (gdpicturePDF.SetPassword("user") == GdPictureStatus.OK) { emode = gdpicturePDF.GetEncryptionMode(); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { MessageBox.Show("This PDF document has been decrypted, the security handler is: " + emode.ToString(), caption); } } } else { emode = gdpicturePDF.GetEncryptionMode(); if (gdpicturePDF.GetStat() == GdPictureStatus.OK) { MessageBox.Show("The PDF document is not encrypted. The security handler is: " + emode.ToString(), caption); } } } else { MessageBox.Show("The file can't be loaded.", caption); } gdpicturePDF.Dispose();