Sign PDF - VB.NET
PDF SDK sample in VB.NET demonstrating ‘Sign PDF’
Program.vb
Imports System.Drawing
Imports Bytescout.PDF
''' <summary>
''' This example demonstrates how to digitally sign PDF document.
''' </summary>
Class Program
Shared Sub Main()
' Create new document
Dim pdfDocument = New Document()
pdfDocument.RegistrationName = "demo"
pdfDocument.RegistrationKey = "demo"
' If you wish to load an existing document uncomment the line below And comment the Add page section instead
' pdfDocument.Load(".\existing_document.pdf")
' Add page
Dim page = New Page(PaperFormat.A4)
pdfDocument.Pages.Add(page)
' Add sample page content
Dim brush = New Bytescout.PDF.SolidBrush()
Dim font = New Bytescout.PDF.Font("Arial", 16)
Dim rect = New RectangleF(0, 50, page.Width, 100)
Dim stringFormat = New Bytescout.PDF.StringFormat()
stringFormat.HorizontalAlign = HorizontalAlign.Center
page.Canvas.DrawString("Signature Test", font, brush, rect, stringFormat)
' Signing parameters
Dim certficateFile = ".\demo_certificate.pfx"
Dim certficatePassword = "123"
' Optional parameters
Dim signingReason = "Approval"
Dim contactName = "John Smith"
Dim location = "Corporate HQ"
' Invisible signature
'pdfDocument.Sign(certficateFile, certficatePassword)
' Visible signature
Dim signatureRect = New RectangleF(400, 50, 150, 100)
pdfDocument.Sign(certficateFile, certficatePassword, signatureRect, signingReason, contactName, location)
' Save document to file
pdfDocument.Save("result.pdf")
' Cleanup
pdfDocument.Dispose()
' Open document in default PDF viewer application
Process.Start("result.pdf")
End Sub
End Class
Resources.Designer.vb
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