Replace specific image on specific page in PDF using iTextsh

Mustafa ALKhuzaie

Current code replace all images in all pages, i need replace one image in specific page

thanks

My code

//Source pdf
PdfReader pdf = new PdfReader(@\\file-01\);
//destination pdf

PdfStamper stp = new PdfStamper(pdf, new FileStream(E:\CMMS));
PdfWriter writer = stp.Writer;
//red text (Mz.083mDD)to find the specific page that content image
int pageNo = pdf.XrefSize;

for (int pageNumber = 1; pageNumber <= pdf.NumberOfPages; pageNumber++)
{

ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();

string currentPageText = PdfTextExtractor.GetTextFromPage(pdf, pageNumber, strategy);
if (currentPageText.Contains("Mz.083mDD"))
{
Session["page_location"] = pageNumber;

}

}

int pageNumber1 = (int)Session["page_location"];

iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(@"E:\CMMS\143.gif");
PdfDictionary pg = pdf.GetPageN(pageNumber1);
PdfDictionary res =
(PdfDictionary)PdfReader.GetPdfObject(pg.Get(PdfName.RESOURCES));
PdfDictionary xobj =
(PdfDictionary)PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT));
if (xobj != null)
{
foreach (PdfName name in xobj.Keys)
{

PdfObject obj = xobj.Get(name);
if (obj.IsIndirect())
{
PdfDictionary tg = (PdfDictionary)PdfReader.GetPdfObject(obj);
PdfName type =
(PdfName)PdfReader.GetPdfObject(tg.Get(PdfName.SUBTYPE));
if (PdfName.IMAGE.Equals(type))
{

PdfReader.KillIndirect(obj);
iTextSharp.text.Image maskImage = img.ImageMask;
if (maskImage != null)
writer.AddDirectImageSimple(maskImage);
writer.AddDirectImageSimple(img, (PRIndirectReference)obj);
break;
}
}
}

}

3 Replies

Know the answer? Post it — somebody with the same question will find it here.

Marvin Reid4y ago
You can use the Document Editor from the LEADTOOLS SDK to replace the image on the page. Here are resources that will help you with this.

https://www.leadtools.com/help/sdk/v22/dh/javascript/de/namespace.html#!
https://demo.leadtools.com/JavaScript/DocumentEditor/
+1
alice yang9y ago
Hey,

You can use Free Spire.PDF and below code to replace one image on specific page.

Code:
PdfDocument doc = new PdfDocument();
doc.LoadFromFile("Test.pdf");
PdfPageBase page = doc.Pages[0];
PdfImage image = PdfImage.FromFile("image.png");
page.ReplaceImage(0, image);
doc.SaveToFile("result.pdf");
Reference:
https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Image/How-to-replace-the-existing-image-on-the-PDF-file-in-C.html
+1
Ananth G9y ago
image url ,specific image, page as a parameter.
FunForGeneratePdf(@"E:\CMMS\33434.gif",@"E:\CMMS\143.gif","5");

Public void FunForGeneratePdf(string objImgUrl,string objSpecificImgUrl, string objSpecificPageNo)
{
//Include your code
if (objSpecificPageNo==pageNumber1.ToString())
{
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(objSpecificImgUrl);//use like this
}
else{
iTextSharp.text.Image img = iTextSharp.text.Image.GetInstance(objImgUrl);
}
}
+1