Dear all,
I am evaluating Aspose.PDF, how to insert a watermark into existing .PDF … I am trying to use codes below, but no luck:
private void createSignedPDF(string originalfolder, string filename, string signedfolder)
{
try
{
//open document
string pdffile = originalfolder + “\” + filename;
Document pdfDocument = new Document(pdffile);
//set coordinates
int lowerLeftX = 400;
int lowerLeftY = 75;
int upperRightX = 550;
int upperRightY = 100;
//get the page where image needs to be added
Page page = pdfDocument.Pages[pdfDocument.Pages.Count];
//load image into stream
FileStream imageStream = new FileStream(“aspose-logo.jpg”, FileMode.Open);
//add image to Images collection of Page Resources
page.Resources.Images.Add(imageStream);
//using GSave operator: this operator saves current graphics state
page.Contents.Add(new Operator.GSave());
//create Rectangle and Matrix objects
Aspose.Pdf.Rectangle rectangle = new Aspose.Pdf.Rectangle(lowerLeftX, lowerLeftY, upperRightX, upperRightY);
Aspose.Pdf.DOM.Matrix matrix = new Aspose.Pdf.DOM.Matrix(new double[] { rectangle.URX - rectangle.LLX, 0, 0, rectangle.URY - rectangle.LLY, rectangle.LLX, rectangle.LLY });
//using ConcatenateMatrix (concatenate matrix) operator: defines how image must be placed
page.Contents.Add(new Operator.ConcatenateMatrix(matrix));
XImage ximage = page.Resources.Images[page.Resources.Images.Count];
//using Do operator: this operator draws image
page.Contents.Add(new Operator.Do(ximage.Name));
//using GRestore operator: this operator restores graphics state
page.Contents.Add(new Operator.GRestore());
TextStamp textStamp = new TextStamp(“my text stamp goes here!”);
textStamp.Rotate = Rotation.on90;
textStamp.Background = true;
textStamp.TextState.FontSize = 5.0F;
textStamp.TextState.FontStyle = FontStyles.Bold;
textStamp.TextState.FontStyle = FontStyles.Italic;
pdfDocument.Pages[pdfDocument.Pages.Count].AddStamp(textStamp);
pdfDocument.Pages[pdfDocument.Pages.Count].Watermark.Image.Save(“mywatermark.jpg”);
//save updated document
string newpdf_file = signedfolder + “\” + filename.Substring(0, filename.IndexOf(".pdf")) + “_SIGNED.pdf”;
pdfDocument.Save(newpdf_file);
imageStream.Close();
}
catch { }
finally { }
}
it01: