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PdfDigitalSignatureDetailsSignatureLine Property

Gets or sets the signature line (anchor).

Namespace: SautinSoft.Document
Assembly: SautinSoft.Document (in SautinSoft.Document.dll) Version: 2024.3.11
Syntax
public ShapeBase SignatureLine { get; set; }

Property Value

ShapeBase
Example

See Developer Guide: Generate PDF document with the digital signature

Generate PDF document with the digital signature using C#
using System.IO;
using System.Linq;
using SautinSoft.Document;
using SautinSoft.Document.Drawing;
namespace Sample
{
    class Sample
    {

        static void Main(string[] args)
        {
            // Get your free 30-day key here:   
            // https://sautinsoft.com/start-for-free/

            DigitalSignature();
        }

        /// <summary>
        /// Load an existing document (*.docx, *.rtf, *.pdf, *.html, *.txt, *.pdf) and save it in a PDF document with the digital signature.
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/digital-signature-net-csharp-vb.php
        /// </remarks>
        public static void DigitalSignature()
        {
            // Path to a loadable document.
            string loadPath = @"..\..\..\digitalsignature.docx";
            string savePath = "Result.pdf";

            DocumentCore dc = DocumentCore.Load(loadPath);

            // Create a new invisible Shape for the digital signature.       
            // Place the Shape into top-left corner (0 mm, 0 mm) of page.
            Shape signatureShape = new Shape(dc, Layout.Floating(new HorizontalPosition(0f, LengthUnit.Millimeter, HorizontalPositionAnchor.LeftMargin),
                                    new VerticalPosition(0f, LengthUnit.Millimeter, VerticalPositionAnchor.TopMargin), new Size(1, 1)));
            ((FloatingLayout)signatureShape.Layout).WrappingStyle = WrappingStyle.InFrontOfText;
            signatureShape.Outline.Fill.SetEmpty();

            // Find a first paragraph and insert our Shape inside it.
            Paragraph firstPar = dc.GetChildElements(true).OfType<Paragraph>().FirstOrDefault();
            firstPar.Inlines.Add(signatureShape);

            // Picture which symbolizes a handwritten signature.
            Picture signaturePict = new Picture(dc, @"..\..\..\signature.png");

            // Signature picture will be positioned:
            // 14.5 cm from Top of the Shape.
            // 4.5 cm from Left of the Shape.
            signaturePict.Layout = Layout.Floating(
               new HorizontalPosition(4.5, LengthUnit.Centimeter, HorizontalPositionAnchor.Page),
               new VerticalPosition(14.5, LengthUnit.Centimeter, VerticalPositionAnchor.Page),
               new Size(20, 10, LengthUnit.Millimeter));

            PdfSaveOptions options = new PdfSaveOptions();

            // Path to the certificate (*.pfx).
            options.DigitalSignature.CertificatePath = @"..\..\..\sautinsoft.pfx";

            // The password for the certificate.
            // Each certificate is protected by a password.
            // The reason is to prevent unauthorized the using of the certificate.
            options.DigitalSignature.CertificatePassword = "123456789";

            // Additional information about the certificate.
            options.DigitalSignature.Location = "World Wide Web";
            options.DigitalSignature.Reason = "Document.Net by SautinSoft";
            options.DigitalSignature.ContactInfo = "info@sautinsoft.com";

            // Placeholder where signature should be visualized.
            options.DigitalSignature.SignatureLine = signatureShape;

            // Visual representation of digital signature.
            options.DigitalSignature.Signature = signaturePict;

            dc.Save(savePath, options);

            // Open the result for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(savePath) { UseShellExecute = true });
        }
    }
}
Generate PDF document with the digital signature using VB.Net
Imports System
Imports System.Linq
Imports System.IO
Imports SautinSoft.Document
Imports SautinSoft.Document.Drawing

Module Sample
    Sub Main()
        DigitalSignature()
    End Sub
    ''' Get your free 30-day key here:   
    ''' https://sautinsoft.com/start-for-free/
    ''' <summary>
    ''' Load an existing document (*.docx, *.rtf, *.pdf, *.html, *.txt, *.pdf) and save it in a PDF document with the digital signature.
    ''' </summary>
    ''' <remarks>
    ''' Details: https://sautinsoft.com/products/document/help/net/developer-guide/digital-signature-net-csharp-vb.php
    ''' </remarks>
    Sub DigitalSignature()
        ' Path to a loadable document.
        Dim loadPath As String = "..\..\..\digitalsignature.docx"
        Dim savePath As String = "Result.pdf"

        Dim dc As DocumentCore = DocumentCore.Load(loadPath)

        ' Create a new invisible Shape for the digital signature.       
        ' Place the Shape into top-left corner (0 mm, 0 mm) of page.
        Dim signatureShape As New Shape(dc, Layout.Floating(New HorizontalPosition(0F, LengthUnit.Millimeter, HorizontalPositionAnchor.LeftMargin), New VerticalPosition(0F, LengthUnit.Millimeter, VerticalPositionAnchor.TopMargin), New Size(1, 1)))
        CType(signatureShape.Layout, FloatingLayout).WrappingStyle = WrappingStyle.InFrontOfText
        signatureShape.Outline.Fill.SetEmpty()

        ' Find a first paragraph and insert our Shape inside it.
        Dim firstPar As Paragraph = dc.GetChildElements(True).OfType(Of Paragraph)().FirstOrDefault()
        firstPar.Inlines.Add(signatureShape)

        ' Picture which symbolizes a handwritten signature.
        Dim signaturePict As New Picture(dc, "..\..\..\signature.png")

        ' Signature picture will be positioned:
        ' 14.5 cm from Top of the Shape.
        ' 4.5 cm from Left of the Shape.
        signaturePict.Layout = Layout.Floating(New HorizontalPosition(4.5, LengthUnit.Centimeter, HorizontalPositionAnchor.Page), New VerticalPosition(14.5, LengthUnit.Centimeter, VerticalPositionAnchor.Page), New Size(20, 10, LengthUnit.Millimeter))

        Dim options As New PdfSaveOptions()

        ' Path to the certificate (*.pfx).
        options.DigitalSignature.CertificatePath = "..\..\..\sautinsoft.pfx"

        ' The password for the certificate.
        ' Each certificate is protected by a password.
        ' The reason is to prevent unauthorized the using of the certificate.
        options.DigitalSignature.CertificatePassword = "123456789"

        ' Additional information about the certificate.
        options.DigitalSignature.Location = "World Wide Web"
        options.DigitalSignature.Reason = "Document.Net by SautinSoft"
        options.DigitalSignature.ContactInfo = "info@sautinsoft.com"

        ' Placeholder where signature should be visualized.
        options.DigitalSignature.SignatureLine = signatureShape

        ' Visual representation of digital signature.
        options.DigitalSignature.Signature = signaturePict

        dc.Save(savePath, options)

        ' Open the result for demonstration purposes.
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(savePath) With {.UseShellExecute = True})
    End Sub
End Module
See Also