如何在pdf或使用itextsharp在asp.net中顯示水印文本

Question

幫我在pdf中使用itextsharp顯示水印文本 謝謝， Sunil。

Answer 1

請參考this你的問題，這清除了你對你的問題的一些懷疑。

Answer 2

link for pdfsharp dll 與pdfsharp 「進口此

Imports System.IO 
    Imports PdfSharp.Pdf 
    Imports PdfSharp.Pdf.IO 
    Imports PdfSharp.Drawing 

    Dim doc = ReturnCompatiblePdf(path_of_pdf_file) 
    Dim document As New PdfDocument 
    document = PdfReader.Open(doc, PdfDocumentOpenMode.Modify) 
    Dim watermark As String = "This is my watermark" 

    For Each page_ As PdfPage In document.Pages 

     Dim gfx As XGraphics = XGraphics.FromPdfPage(page_, XGraphicsPdfPageOptions.Append) 
     Dim fontx As New XFont("Trebuchet MS", 8, FontStyle.Bold) 
     Dim posx, posy As Double 
     posx = (page_.Width.Value - watermark.Length)/2 
     posy = page_.Height.Value - 8 
     gfx.TranslateTransform(posx, posy) 
     gfx.DrawString(watermark, fontx, XBrushes.Black, New XPoint(1, 1), XStringFormats.Default) 
    Next 

    If File.Exists(save_path) = False Then 
     document.Save(save_path) 
    End If