Cancel or delete pdf watermarks

Aspose.PDF Product Family
1

Hello, may I ask how to cancel or delete using aspose.pdf PDF watermarks, please provide relevant Demo。my email hneg_qiaoer@qq.com,

Expect replies

2

Hi there,


Thanks for your inquiry. You can remove TextStamp/Watermark by replacing stamp contents with empty text string as following.

PdfContentEditor editor = new PdfContentEditor();<o:p></o:p>

editor.BindPdf(myDir + “watermark.pdf”);<o:p></o:p>

editor.ReplaceText(“Test Watermark”, “”);<o:p></o:p>

editor.Save(myDir + “watermark_out.pdf”);<o:p></o:p>


Moreover, there is another convenient way to delete watermark with Aspose.Pdf using DeleteStampById() method but in this case watermark should be added using Aspose.Pdf API with StampId and later you can delete that specific watermark. Please check following sample code for the purpose.


//****Adding Text Stamp****//

Document pdfDocument = new Document(myDir + "Helloworld.pdf");

FormattedText txtFormatted = new FormattedText();

txtFormatted.AddNewLineText("Processed/Reviewed By:");

txtFormatted.AddNewLineText(DateTime.Now.ToString());

TextStamp textStamp = new TextStamp(txtFormatted);

textStamp.Background=true;

textStamp.BottomMargin=50;

textStamp.HorizontalAlignment=HorizontalAlignment.Right;

textStamp.VerticalAlignment=VerticalAlignment.Bottom;

textStamp.YIndent=10;

textStamp.TextState.FontSize=10;

textStamp.Opacity=100;

//Set ID of stamp

textStamp.setStampId(999);

pdfDocument.Pages[1].AddStamp(textStamp);

//save output document

pdfDocument.Save(myDir + "Helloworld_textstamp.pdf");

//****Removing Text Stamp****//

PdfContentEditor contentEditor = new PdfContentEditor();

contentEditor.BindPdf(myDir + "Helloworld_textstamp.pdf");

StampInfo[] stampInfo = contentEditor.GetStamps(1);

//Loop through each stamp

for (int i = 0; i < stampInfo.Length; i++)

{

//Check to see if the ID = 999, if so delete the stamp.

if (stampInfo[i].StampId == 999)

{ contentEditor.DeleteStampById(stampInfo[i].StampId); }

}

contentEditor.Save(myDir + "Hellowrold_deletestamp.pdf");

Hopefully it will help you to accomplish your requirements. Please feel free to contact us for any further assistance.


Best Regards,