C watermarks PDF files
- 2021-12-12 05:22:47
- OfStack
This article example for everyone to share C # add PDF file watermark specific code, for your reference, the specific content is as follows
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text.pdf;
using iTextSharp.text;
using System.IO;
using System.Web.UI.HtmlControls;
using System.Drawing;
//itextsharp.dll version:5.1.10
protected void Button1_Click(object sender, EventArgs e)
{
string source =@"D:\My.Sample\C#NET\Exoport2PDF\Web2\Chap1011.pdf"; // Template path
string output = @"D:\My.Sample\C#NET\Exoport2PDF\Web2\Chap1012.pdf"; // After exporting the watermark background PDF
string watermark = @"D:\My.Sample\C#NET\Exoport2PDF\Web2\gp0.jpg"; // Watermark image
bool isSurrcess = PDFWatermark(source, output, watermark, 10, 10);
}
public bool PDFWatermark(string inputfilepath, string outputfilepath, string ModelPicName, float top, float left)
{
//throw new NotImplementedException();
PdfReader pdfReader = null;
PdfStamper pdfStamper = null;
try
{
pdfReader = new PdfReader(inputfilepath);
int numberOfPages = pdfReader.NumberOfPages;
iTextSharp.text.Rectangle psize = pdfReader.GetPageSize(1);
float width = psize.Width;
float height = psize.Height;
pdfStamper = new PdfStamper(pdfReader, new FileStream(outputfilepath, FileMode.Create));
PdfContentByte waterMarkContent;
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(ModelPicName);
image.GrayFill = 20;// Transparency, gray fill
//image.Rotation// Rotate
//image.RotationDegrees// Angle of rotation
// Location of watermark
if (left < 0)
{
left = width - image.Width + left;
}
image.SetAbsolutePosition(left, (height - image.Height) - top);
// Every 1 Page watermarking , You can also set a 1 Page watermarking
for (int i = 1; i <= numberOfPages; i++)
{
waterMarkContent = pdfStamper.GetUnderContent(i);
waterMarkContent.AddImage(image);
}
//strMsg = "success";
return true;
}
catch (Exception ex)
{
ex.Message.Trim();
return false;
}
finally
{
if (pdfStamper != null)
pdfStamper.Close();
if (pdfReader != null)
pdfReader.Close();
}