Add page numbers to pdf with pdf sdk is simple to apply in VB.NET if you use these source codes below. ByteScout Premium Suite: the bundle that includes twelve SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording. It can add page numbers to pdf with pdf sdk in VB.NET.
Want to save time? You will save a lot of time on writing and testing code as you may just take the VB.NET code from ByteScout Premium Suite for add page numbers to pdf with pdf sdk below and use it in your application. Follow the instructions from scratch to work and copy the VB.NET code. Applying VB.NET application mostly includes various stages of the software development so even if the functionality works please test it with your data and the production environment.
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      Imports Bytescout.PDF
Imports Font = Bytescout.PDF.Font
Imports SolidBrush = Bytescout.PDF.SolidBrush
Module Program
#Region "Declarations"
    Private Enum PageNoStyle
        TopLeft
        TopRight
        BottomLeft
        BottomRight
    End Enum
#End Region
    Sub Main()
        Try
            Using doc As Document = New Document()
                ' Add registration keys
                doc.RegistrationName = "demo"
                doc.RegistrationKey = "demo"
                ' Load document
                doc.Load("sample.pdf")
                ' Write template in each pages
                For i As Integer = 0 To doc.Pages.Count - 1
                    Dim currentPage As Page = doc.Pages(i)
                    _AddPageNo(currentPage, "Page #" & (i + 1), PageNoStyle.BottomRight)
                Next
                ' Save output file
                doc.Save("result.pdf")
            End Using
            ' Open output file
            Process.Start("result.pdf")
        Catch ex As Exception
            Console.WriteLine(ex.Message)
            Console.WriteLine("Press enter key to exit...")
            Console.ReadLine()
        End Try
    End Sub
    ''' <summary>
    ''' Add Page No
    ''' </summary>
    Private Sub _AddPageNo(ByVal currentPage As Page, ByVal pageNoText As String, ByVal pageNoStyle As PageNoStyle)
        Dim float_left As Single = 10
        Dim float_top As Single = 10
        Select Case pageNoStyle
            Case PageNoStyle.TopRight
                float_left = currentPage.Width - 60
            Case PageNoStyle.BottomLeft
                float_top = currentPage.Height - 20
            Case PageNoStyle.BottomRight
                float_top = currentPage.Height - 20
                float_left = currentPage.Width - 60
            Case Else
        End Select
        ' Draw/Write page no
        currentPage.Canvas.DrawString(
            pageNoText,
            New Font(StandardFonts.CourierBold, 12),
            New SolidBrush(),
            float_left,
            float_top)
    End Sub
End Module
    
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