主题：[求助]如何给PDF文件添加水印

mark pdf水印

Dim waterMarkName As String = "aaaaaabbbbcccc"
Dim reader As New iTextSharp.text.pdf.PdfReader("d:\test.pdf")

Dim msWater As new io.FileStream("d:\123.pdf", io.FileMode.Create)

Dim total  As Integer = reader.NumberOfPages
Dim pdfStamper As new iTextSharp.text.pdf.PdfStamper(Reader, msWater)

Dim psize = Reader.GetPageSize(1)
Dim width = psize.Width
Dim height = psize.Height
Dim gs As new iTextSharp.text.pdf.PdfGState
Dim basefont  As iTextSharp.text.pdf.BaseFont = iTextSharp.text.pdf.BaseFont.CreateFont("C:\WINDOWS\Fonts\SIMYOU.TTF", iTextSharp.text.pdf.BaseFont.IDENTITY_H, iTextSharp.text.pdf.BaseFont.NOT_EMBEDDED)
For i As Integer = 1 To total
   
    Dim waterContent = pdfStamper.GetOverContent(i)
    waterContent.SetGState(gs)
    waterContent.BeginText()
    waterContent.SetColorFill( iTextSharp.text.BaseColor.RED)
    waterContent.SetFontAndSize(basefont, 18)
    waterContent.SetTextMatrix(0, 0)
    waterContent.ShowTextAligned(iTextSharp.text.Element.ALIGN_CENTER, waterMarkName, width / 2, height / 2, 55)
    waterContent.EndText()
Next

pdfStamper.close
reader.Close()