how to add digital signature to pdf in vb.net code using itextsharp

Question

add digital signature to pdf in vb.net code using itextsharp - not required code in c# want in vb code

Leon D · Answer

You can use the PdfSignature class of Free Spire.PDF library to add digital signature to pdf in vb.net code with ease. https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/PDF-Protection-Create-Digital-Signature-in-PDF-with-C-VB.NET.html Code example: Imports System Imports System.Drawing Imports Spire.Pdf Imports Spire.Pdf.Security Imports Spire.Pdf.Graphics Namespace AddVisibleSignature Class Program Shared Sub Main( ByVal args() As String ) 'Create a PdfDocument object Dim doc As PdfDocument = New PdfDocument() 'Load a sample PDF file doc.LoadFromFile( "C:\Users\Administrator\Desktop\sample.pdf" ) 'Load the certificate Dim cert As PdfCertificate = New PdfCertificate( "C:\Users\Administrator\Desktop\MyCertificate.pfx" , "e-iceblue" ) 'Create a PdfSignature object and specify its position and size Dim signature As PdfSignature = New PdfSignature(doc,doc.Pages(doc.Pages.Count - 1),cert, "MySignature" ) Dim rectangleF As RectangleF = New RectangleF(doc.Pages(0).ActualSize.Width - 260 - 54,200,260,110) signature.Bounds = rectangleF signature.Certificated = True 'Set the graphics mode to ImageAndSignDetail signature.GraphicsMode = GraphicMode.SignImageAndSignDetail 'Set the signature content signature.NameLabel = "Signer:" signature.Name = "Gary" signature.ContactInfoLabel = "Phone:" signature.ContactInfo = "0123456" signature.DateLabel = "Date:" signature. Date = DateTime.Now signature.LocationInfoLabel = "Location:" signature.LocationInfo = "USA" signature.ReasonLabel = "Reason:" signature.Reason = "I am the author" signature.DistinguishedNameLabel = "DN:" signature.DistinguishedName = signature.Certificate.IssuerName.Name 'Set the signature image source signature.SignImageSource = PdfImage.FromFile( "C:\Users\Administrator\Desktop\handwrittingSignature.png" ) 'Set the signature font signature.SignDetailsFont = New PdfTrueTypeFont( New Font( "Arial Unicode MS" , 12f, FontStyle.Regular)) 'Set the document permission to forbid changes but allow form fill signature.DocumentPermissions = PdfCertificationFlags.ForbidChanges | PdfCertificationFlags.AllowFormFill 'Save to file doc.SaveToFile( "VisiableSignature.pdf" ) doc.Close() End Sub End Class End Namespace

Uday Dodiya · Answer

Kip Hackman LeadTools Is Free Or Paid?

Kip Hackman · Answer

You can use LEADTOOLS PDF Pro SDK technology inside your application. https://www.leadtools.com/sdk/products/pdf-pro You can leverage the PDFFile class, which will allow you to add a digital signature certificate to a PDF file. Note that you can leverage the PDFDocument class to parse digital signatures with LEADTOOLS as well. I know you stated that you are using VB.NET, but the C# .NET tutorial below should provide code that can be easily converted to VB on how to digitally sign PDFs. https://www.leadtools.com/help/sdk/v22/tutorials/dotnet-console-add-a-digital-signature-to-a-pdf.html

Uday Dodiya · Answer

Is spire pdf dll is totally free or paid?

Kip Hackman · Answer

It is paid.

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