Initializes a new PDFFile object and associated it with the name of a PDF file and the password used to decrypt it.
fileName
The name of the file associated with this PDFFile.
password
The password associated with the PDF file at fileName.
This constructor will initialize the properties of the PDFFile object as follows:
DocumentProperties will be set to null
Pages collection will be set to null
After the filename and optional password are set, call the Load method to populate the DocumentProperties and Pages properties of this PDFFile object with the values read from the file.
In certain situation, you may want to associate a PDFFile with a Postscript and not a PDF file. For example, to create a PDFFile object and call its Distill method to convert the Postscript file to PDF.
PDF files password must be 64 ASCII characters or less. This is defined by the PDFDocument.MaximumPasswordLength constant. LEADTOOLS will automatically convert the password string to ASCII and truncate if required.
This example will determine whether a PDF file is encrypted, ask the user for a password then open it.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Controls;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.Pdf;
using Leadtools.Svg;
using Leadtools.WinForms;
public void PDFFileEncryptedExample()
{
string pdfFileName1 = Path.Combine(LEAD_VARS.ImagesDir, @"Leadtools.pdf");
string pdfFileName2 = Path.Combine(LEAD_VARS.ImagesDir, @"Encrypted.pdf");
// Create an encrypted version of Leadtools.pdf
PDFFile file = new PDFFile(pdfFileName1);
file.SecurityOptions = new PDFSecurityOptions();
file.SecurityOptions.UserPassword = "LEAD";
file.Convert(1, -1, pdfFileName2);
// Now try to open it as a document
string password = null;
if (PDFFile.IsEncrypted(pdfFileName2))
{
Console.WriteLine("{0}\nIs encrypted. Enter the password:", pdfFileName2);
password = Console.ReadLine();
}
// If the user entered the correct password (LEAD), you can open the file now
try
{
file = new PDFFile(pdfFileName2, password);
file.Load();
PDFDocumentProperties props = file.DocumentProperties;
Console.WriteLine(" Title: {0}", props.Title);
Console.WriteLine(" Author: {0}", props.Author);
Console.WriteLine(" Subject: {0}", props.Subject);
Console.WriteLine(" Keywords: {0}", props.Keywords);
Console.WriteLine(" Creator: {0}", props.Creator);
Console.WriteLine(" Producer: {0}", props.Producer);
Console.WriteLine(" Created: {0}", props.Created);
Console.WriteLine(" Modified: {0}", props.Modified);
Console.WriteLine("----------:");
}
catch (Exception ex)
{
// Otherwise, you will get an error that the PDF file is corrupted
Console.WriteLine(ex.Message);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Pdf
Imports Leadtools.WinForms
Imports Leadtools.Svg
Imports Leadtools.ImageProcessing
Public Sub PDFFileEncryptedExample()
Dim pdfFileName1 As String = Path.Combine(LEAD_VARS.ImagesDir, "Leadtools.pdf")
Dim pdfFileName2 As String = Path.Combine(LEAD_VARS.ImagesDir, "Encrypted.pdf")
' Create an encrypted version of Leadtools.pdf
Dim file As PDFFile = New PDFFile(pdfFileName1)
file.SecurityOptions = New PDFSecurityOptions()
file.SecurityOptions.UserPassword = "LEAD"
file.Convert(1, -1, pdfFileName2)
' Now try to open it as a document
Dim password As String = Nothing
If PDFFile.IsEncrypted(pdfFileName2) Then
Console.WriteLine("{0}" & Constants.vbLf & "Is encrypted. Enter the password:", pdfFileName2)
password = Console.ReadLine()
End If
' If the user entered the correct password (LEAD), you can open the file now
Try
file = New PDFFile(pdfFileName2, password)
file.Load()
Dim props As PDFDocumentProperties = file.DocumentProperties
Console.WriteLine(" Title: {0}", props.Title)
Console.WriteLine(" Author: {0}", props.Author)
Console.WriteLine(" Subject: {0}", props.Subject)
Console.WriteLine(" Keywords: {0}", props.Keywords)
Console.WriteLine(" Creator: {0}", props.Creator)
Console.WriteLine(" Producer: {0}", props.Producer)
Console.WriteLine(" Created: {0}", props.Created)
Console.WriteLine(" Modified: {0}", props.Modified)
Console.WriteLine("----------:")
Catch ex As Exception
' Otherwise, you will get an error that the PDF file is corrupted
Console.WriteLine(ex.Message)
End Try
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
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