PdfDocumentProcessor.SaveDocument(Stream, PdfSaveOptions) Method

Saves the current PDF document to the specified stream with encryption settings and document signature.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Docs.v18.2.dll

Declaration

C#

public void SaveDocument(
    Stream stream,
    PdfSaveOptions options
)

VB.NET

Public Sub SaveDocument(
    stream As Stream,
    options As PdfSaveOptions
)

Parameters

Name	Type	Description
stream	Stream	A Stream value, specifying the location of the saved document.
options	PdfSaveOptions	A PdfSaveOptions that contains the encryption settings and document signature that should be saved.

Remarks

The SaveDocument method expects the input stream will not be closed or modified while a PDF document is saved (the detachStream parameter is set to false in this method). Be aware that disposing of an output stream that has not been detached may cause errors on an attempt to apply further changes to a document. If you want to close the stream when a document is saved, call another overloaded SaveDocument method with the detachStream parameter enabled.

Important

Using the same stream for loading and saving a document may cause unpredictable results, since the detachStream parameter is set to false in this method.

Example

This example illustrates how to add a visual signature to a PDF document.

To accomplish this task, do the following:

• Create a PDF Document API component represented by an instance of the PdfDocumentProcessor class.
• Load a document from a file using the PdfDocumentProcessor.LoadDocument method.
• Create a certificate using a certificate file name and a password to access the certificate.
• Create a document visual signature using one of the PdfSignature constructor overloads that takes 4 arguments. For example, using a certificate, image data represented by a byte array, and specifying the page number and signature bounds. The signature bounds are represented by a PdfOrientedRectangle object. You can specify the rotation angle for the signature (in radians) when creating a PdfOrientedRectangle object.
• Specify signing location, contact info and reason using the PdfSignature.Location, PdfSignature.ContactInfo and PdfSignature.Reason properties, respectively.
• Save the signed document with signing information by calling the PdfDocumentProcessor.SaveDocument method.

C#

using DevExpress.Pdf;
using System;
using System.IO;
using System.Security.Cryptography.X509Certificates;

namespace PDFSignature {
    class Program {
        static void Main(string[] args) {

            // Create a PDF document processor.
            using (PdfDocumentProcessor documentProcessor = new PdfDocumentProcessor()) {

                // Load a PDF document. 
                documentProcessor.LoadDocument(@"..\..\Demo.pdf");

                // Create a visual signature using certificate, image data, and specifying  page number, signature bounds and rotation angle. 
                X509Certificate2 certificate = new X509Certificate2(@"..\..\SignDemo.pfx", "dxdemo");
                byte[] imageData = File.ReadAllBytes("..\\..\\Signature.png");
                int pageNumber = 1;
                int angleInDegrees = 45; 
                double angleInRadians = angleInDegrees * (Math.PI / 180);
                PdfOrientedRectangle signatureBounds = new PdfOrientedRectangle(new PdfPoint(620, 210), 250, 90, angleInRadians);
                PdfSignature signature = new PdfSignature(certificate, imageData, pageNumber, signatureBounds);

                // Specify signing location, contact info and reason.
                signature.Location = "USA";
                signature.ContactInfo = "[e-mail]";
                signature.Reason = "Approved";

                // Save the signed document.
                documentProcessor.SaveDocument(@"..\..\SignedDocument.pdf", new PdfSaveOptions() { Signature = signature });
            }
        }
    }
}

VB.NET

Imports DevExpress.Pdf
Imports System
Imports System.IO
Imports System.Security.Cryptography.X509Certificates

Namespace PDFSignature
    Class Program
        Private Shared Sub Main(ByVal args As String())
            Using documentProcessor As PdfDocumentProcessor = New PdfDocumentProcessor()
                documentProcessor.LoadDocument("..\..\Demo.pdf")
                Dim certificate As X509Certificate2 = New X509Certificate2("..\..\SignDemo.pfx", "dxdemo")
                Dim imageData As Byte() = File.ReadAllBytes("..\..\Signature.png")
                Dim pageNumber As Integer = 1
                Dim angleInDegrees As Integer = 45
                Dim angleInRadians As Double = angleInDegrees * (Math.PI / 180)
                Dim signatureBounds As PdfOrientedRectangle = New PdfOrientedRectangle(New PdfPoint(620, 210), 250, 90, angleInRadians)
                Dim signature As PdfSignature = New PdfSignature(certificate, imageData, pageNumber, signatureBounds)
                signature.Location = "USA"
                signature.ContactInfo = "[e-mail]"
                signature.Reason = "Approved"
                documentProcessor.SaveDocument("..\..\SignedDocument.pdf", New PdfSaveOptions() With {
                    .Signature = signature
                })
            End Using
        End Sub
    End Class
End Namespace