Adding Image watermark to Pdf while Creating it using iTextSharp?

Question

Adding Image watermark to Pdf while Creating it using iTextSharp with ASP.Net backed with VB.Net

Praveen Mishra · Answer

Hi Sagar , To add an image watermark to a PDF while creating it using iTextSharp with ASP.Net backed with VB.Net, you can follow these steps: Step 1: Install iTextSharp library Make sure you have the iTextSharp library installed in your project. You can install it via NuGet by right-clicking on your project in Visual Studio and selecting "Manage NuGet Packages." Search for "iTextSharp" and install the appropriate package. Step 2: Import necessary namespaces In your VB.Net code file, import the necessary namespaces for iTextSharp: Here is code snipped : Import necessary namespaces Imports iTextSharp.text Imports iTextSharp.text.pdf Create a PDF document Dim document As New Document(PageSize.A4, 50, 50, 50, 50) Create a PdfWriter Dim writer As PdfWriter = PdfWriter.GetInstance(document, New FileStream("path/to/output.pdf", FileMode.Create)) Add content to the document document.Open() Dim imagePath As String = "path/to/image.png" Dim image As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(imagePath) document.Add(image) Dim watermarkImagePath As String = "path/to/watermark.png" Dim watermarkImage As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(watermarkImagePath) watermarkImage.SetAbsolutePosition(200, 400) ' Set the position of the watermark image on the page Dim pageCount As Integer = document.PageNumber For i As Integer = 1 To pageCount document.SetPageSize(PageSize.A4) document.NewPage() document.Add(watermarkImage) Next document.Close()

Amit Mohanty · Answer

Check this Dim document As New Document() Dim writer As PdfWriter = PdfWriter.GetInstance(document, New FileStream("path/to/output.pdf", FileMode.Create)) document.Open() ' Add content to the document ' Add tables, additional text, etc. document.Add(New Paragraph("Hello, World!")) Dim table As New PdfPTable(1) Dim cell As New PdfPCell(New Phrase("Hello, World!")) table.AddCell(cell) document.Add(table) ' Create a watermark object Dim watermark As PdfContentByte = writer.DirectContentUnder ' Load the watermark image Dim watermarkImage As Image = Image.GetInstance("path/to/watermark.png") watermarkImage.SetAbsolutePosition(100, 100) ' Set the transparency of the watermark watermark.SetGState(New PdfGState() With {.FillOpacity = 0.5F}) ' Add the watermark to each page For i As Integer = 1 To writer.PageNumber watermark.AddImage(watermarkImage) watermark.BeginText() watermark.EndText() Next document.Close()