ByteScout Barcode Suite – VB.NET – Add custom images to pdf document with barcode sdk

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ByteScout Barcode Suite – VB.NET – Add custom images to pdf document with barcode sdk

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ByteScout-Barcode-Suite-VB-NET-Add-custom-images-to-pdf-document-with-barcode-sdk.pdf

How to add custom images to pdf document with barcode sdk in VB.NET with ByteScout Barcode Suite

Continuous learning is a crucial part of computer science and this tutorial shows how to add custom images to pdf document with barcode sdk in VB.NET

Sample source code below will display you how to manage a complex task like add custom images to pdf document with barcode sdk in VB.NET. ByteScout Barcode Suite is the bundle that privides 3 SDK products to generate barcodes (Barcode SDK), read barcodes (Barcode Reaer SDK) and read and write spreadsheets (Spreadsheet SDK). It can be applied to add custom images to pdf document with barcode sdk using VB.NET.

This prolific sample source code in VB.NET for ByteScout Barcode Suite contains various functions and other necessary options you should do calling the API to add custom images to pdf document with barcode sdk. This VB.NET sample code is all you need for your app. Just copy and paste the code, add references (if needs to) and you are all set! Enjoy writing a code with ready-to-use sample VB.NET codes.

ByteScout Barcode Suite free trial version is available on our website. VB.NET and other programming languages are supported.

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Program.vb

      Imports System.Diagnostics
Imports System.Drawing
Imports Bytescout.BarCode

' This example demostrates adding of barcode together with some custom images (e.g. target marks) to PDF document.
' Also shows the manual calculation of barcode size from inches to pixels and document units (points).
' Task: place Code39 barcode of 2" x 3/8" size at 2" from top-right corner and two target marks at 1" from top-right and bottom-left corners.

Namespace AddBarcodeToPdfDocument
	Class Program
        Friend Shared Sub Main(args As String())

            ' Create Barcode instance and set it up
            Dim barcode As New Barcode("demo", "demo")
            barcode.Symbology = SymbologyType.Code39
            barcode.Value = "00090112"
            barcode.DrawCaption = True
            barcode.CaptionFont = New Font("Courier", 12.0F, FontStyle.Bold, GraphicsUnit.Point)
            barcode.DrawQuietZones = False
            barcode.ResolutionX = 300 ' High resolution for better quality on document scaling and printing.
            barcode.ResolutionY = 300

            ' Compute barcode image dimension from inches to pixels at 300 DPI:

            Dim barHeight As Integer = CInt(Math.Truncate(3.0F / 8 * 300)) ' = 3/8" * 300 DPI = height of bars
            Dim captionHeight As Integer = CInt(Math.Truncate(barcode.CaptionFont.GetHeight(barcode.ResolutionY)))
            Dim captionGap As Integer = CInt(Math.Truncate(1.0F / 8 * 300)) ' = 1/8" gap

            Dim barcodeImageWidth As Integer = 2 * 300 ' = 2" * 300 DPI = width of barcode
            Dim barcodeImageHeight As Integer = barHeight + captionGap + captionHeight + 28 ' 28 = height of watermark text (painted in Trial version only)

            ' Get final barcode image:

            barcode.BarHeight = barHeight
            barcode.FitInto(barcodeImageWidth, barcodeImageHeight, UnitOfMeasure.Pixel)
            Dim barcodeImage As Image = barcode.GetImage()
            
            ' Arrays of images and points to apply to PDF document
            Dim images As Image() = New Image(2) {}
            Dim points As Point() = New Point(2) {}

            ' Compute coordinates of barcode image and target marks ar 72 DPI
            ' (page size is 8.5" x 11", PDF document resolution is always 72 DPI):

            Dim x As Integer = CInt(Math.Truncate(8.5F * 72 - 2 * 72 - barcodeImageWidth / 300.0F * 72)) ' = page width - 2" - barcodeImageWidth at 72 DPI = X coordinate to put the barcode image
            Dim y As Integer = 2 * 72 ' = 2" - Y coordinate to put the barcode image

            ' Put barcode image into array
            images(0) = barcodeImage
            points(0) = New Point(x, y)

            ' Load target mark image.
            ' TargetMark.png is 1/8" 300 DPI image (38x38 pixels) 
            Dim targetMarkImage As Image = Image.FromFile("TargetMark.png")

            ' Coordinates of top-right target mark
            x = CInt(Math.Truncate(8.5F * 72 - 1 * 72 - 1.0F / 8 * 72)) ' = pageWidth - 1" - target mark width (1/8") at 72DPI = X coordinate to put the barcode image
            y = 1 * 72 ' = 1" - Y coordinate to put the barcode image

            ' Put first target mark image into array
            images(1) = targetMarkImage
            points(1) = New Point(x, y)

            ' Coordinates of bottom-left target mark
            x = 1 * 72 ' = 1"
            y = CInt(Math.Truncate(11.0F * 72 - 1 * 72 - 1.0F / 8 * 72)) ' = page height - 1" - target mark height (1/8") at 72DPI

            ' Put second target mark image into array
            images(2) = targetMarkImage
            points(2) = New Point(x, y)

            ' Draw images on all PDF document pages.
            barcode.DrawImagesToPDF("wikipedia.pdf", -1, images, points, "result.pdf")

            ' Cleanup
            barcodeImage.Dispose()
            targetMarkImage.Dispose()
            barcode.Dispose()

            ' Open the result document in default associated application
            Process.Start("result.pdf")

        End Sub
		
	End Class
End Namespace