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Inserting an image after text

I'm making a simple program with .NET and iText7
Inserting a signature image in a PDF document is one of the functions under production.
It has been implemented until the image is inserted into the PDF and newly saved, but I don't know if the image goes behind the text.
The Canvas function seems to be possible, but no matter how many times I look at the example, I can't see any parameters related to the placement.
It would be nice to present a keyword that can implement the function.
The sample results are attached to help understanding. In the figure, the left is the capture of the PDF in which I inserted my signature using a word processor, and the right is the capture of the PDF generated through IText.
My iText version is .Net 7.2.1.
I attached the code below just in case it was necessary.
Thank you.
public void PDF_SIGN(FileInfo old_fi)
{
string currentPath = System.IO.Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
String imageFile = currentPath + "\\sign.jpg";
ImageData data = ImageDataFactory.Create(imageFile);
string source = old_fi.FullName;
string sourceFileName = System.IO.Path.GetFileNameWithoutExtension(source);
string sourceFileExtenstion = System.IO.Path.GetExtension(source);
string dest = old_fi.DirectoryName + "\\" + sourceFileName + "(signed)" + sourceFileExtenstion;
PdfDocument pdfDoc = new PdfDocument(new PdfReader(source), new PdfWriter(dest));
Document document = new Document(pdfDoc);
iText.Layout.Element.Image image = new iText.Layout.Element.Image(data);
image.ScaleAbsolute(Xsize, Ysize);
image.SetFixedPosition(1, Xaxis, Yaxis);
document.Add(image);
document.Close();
pdfDoc.Close();
}
Sample Result (Left: Gaol, Right: Current result):

You can organize content you add using iText in the same pass before or behind each other simply by the order of adding, and layout elements may have background images or colors.
The previously existing content of the source document, consequentially, usually serves as a mere background of everything new. Except, that is, if you draw to a page in a content stream that precedes earlier content.
Unfortunately you cannot use the Document class for this as its renderer automatically works in the foreground. But you can use the Canvas class here; this class only works on a single object (e.g. a single page) but it can be initialized in a far more flexible way.
In your case, therefore, replace
Document document = new Document(pdfDoc);
iText.Layout.Element.Image image = new iText.Layout.Element.Image(data);
image.ScaleAbsolute(Xsize, Ysize);
image.SetFixedPosition(1, Xaxis, Yaxis);
document.Add(image);
document.Close();
by
iText.Layout.Element.Image image = new iText.Layout.Element.Image(data);
image.ScaleAbsolute(Xsize, Ysize);
image.SetFixedPosition(1, Xaxis, Yaxis);
PdfPage pdfPage = pdfDoc.GetFirstPage();
PdfCanvas pdfCanvas = new PdfCanvas(pdfPage.NewContentStreamBefore(), pdfPage.GetResources(), pdfDoc);
using (Canvas canvas = new Canvas(pdfCanvas, pdfPage.GetCropBox()))
{
canvas.Add(image);
}
and you should get the desired result.
(Actually I tested that using Java and ported it to C# in writing this answer. I hope it's ported all right.)
As an aside, if you only want to put an image on the page, you don't really need the Canvas, you can directly use one of the AddImage* methods of PdfCanvas. For multiple elements to be automatically arranged, though, using the Canvas is a good idea.
Also I said above that you cannot use Document here. Actually you can if you replace the document renderer that class uses. For the task at hand that would have been an overkill, though.

get height and width of docx file without using office

I get count of pages in next code:
using DocumentFormat.OpenXml.Packaging;
WordprocessingDocument doc = WordprocessingDocument.Open( #"D:\2pages.docx", false );
Console.WriteLine(
doc.ExtendedFilePropertiesPart.Properties.Pages.InnerText.ToString()
);
can I get in this way height and width of file?
or in another way but without using office.

Aspose.Word (which is not free) has these things built in:
https://docs.aspose.com/display/wordsnet/Changing+Page+Setup+for+Whole+Document+using+Aspose.Words
Document doc = new Document();
// This truly makes the document empty. No sections (not possible in Microsoft Word).
doc.RemoveAllChildren();
// Create a new section node.
// Note that the section has not yet been added to the document,
// but we have to specify the parent document.
Section section = new Section(doc);
// Append the section to the document.
doc.AppendChild(section);
// Lets set some properties for the section.
section.PageSetup.SectionStart = SectionStart.NewPage;
section.PageSetup.PaperSize = PaperSize.Letter;
Someone had a similar problem and this is the discussion on SO (but with OpenXML):
Change Page size of Wor Document using Open Xml SDK 2.0
Maybe you can deduct your answer from this.

Please use PageSetup.PageHeight and PageSetup.PageWidth properties to get the page's height and width. Hope this helps you.
Document doc = new Document(MyDir + "input.docx");
Console.WriteLine(doc.FirstSection.PageSetup.PageHeight);
Console.WriteLine(doc.FirstSection.PageSetup.PageWidth);
I work with Aspose as Developer Evangelist.

MVCRazorToPdf (iTextSharp) using custom font

I am trying to add a custom font to my pdf output using the nuget package MVCRazorToPdf but I am having trouble with how to do this as the documentation for iTextSharp isn't great and all seems to be outdated.
The current code I have for creating the pdf is:
return new PdfActionResult(
"test.cshtml",
new TestModel(),
(writer, document) =>
{
FontFactory.Register(HostingEnvironment.MapPath("~/content/fonts/vegur-regular-webfont.ttf"), "VegurRegular");
});
Where writer is a PdfWriter and document is a Document
All the examples of using the FontFactory show that you need to use the XmlWorker but I don't have access to that, so I was wondering if there was any way to change the documents font using the writer or document?
I've seen that there is the document.HtmlStyleClass property but can't find anything about how to use this anywhere.
Any help with this would be greatly appreciated

MVCRazorToPdf is a very, very simple wrapper around iTextSharp's XMLWorker and uses the even simpler XMLWorkerHelper with all defaults to do its work. If you look at the source you'll see this:
document.Open();
using (var reader = new StringReader(RenderRazorView(context, viewName)))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, reader);
document.Close();
output = workStream.ToArray();
}
If you're dead-set on using the NuGet version then you're stuck with this implementation and you're not going to be able to register a custom font.
However, there's an open issue regarding this that includes a fix so if you're willing to compile from source you can apply that change and you should be all set.
If you want to go one step further I'd recommend reading this great post that shows how simple parsing HTML with iTextSharp is as well Bruno's post here that shows how to register fonts.
EDIT
As per the post in the includes a fix link (just in case the link breaks in future), change the above using statement to:
using (var reader = new MemoryStream(Encoding.UTF8.GetBytes(RenderRazorView(context, viewName))))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, reader, null, FontFactory.FontImp as IFontProvider);
document.Close();
output = workStream.ToArray();
}
And then the font factory as registered in the question above will work when using style="font-family:VegurRegular;"

Set BaseUrl of an existing Pdf Document

We're having trouble setting a BaseUrl using iTextSharp. We have used Adobes Implementation for this in the past, but we got some severe performance issues. So we switched to iTextSharp, which is aprox 10 times faster.
Adobe enabled us to set a base url for each document. We really need this in order to deploy our documents on different servers. But we cant seem to find the right code to do this.
This code is what we used with Adobe:
public bool SetBaseUrl(object jso, string baseUrl)
{
try
{
object result = jso.GetType().InvokeMember("baseURL", BindingFlags.SetProperty, null, jso, new Object[] {baseUrl });
return result != null;
}
catch
{
return false;
}
}
A lot of solutions describe how you can insert links in new or empty documents. But our documents already exist and do contain more than just text. We want to overlay specific words with a link that leads to one or more other documents. Therefore, its really important to us that we can insert a link without accessing the text itself. Maybe lay a box ontop of these words and set its position (since we know where the words are located in the document)
We have tried different implementations, using the setAction method, but it doesnt seem to work properly. The result was in most cases, that we saw out box, but there was no link inside or associated with it. (the cursor didn't change and nothing happend, when i clicked inside the box)
Any help is appreciated.

I've made you a couple of examples.
First, let's take a look at BaseURL1. In your comment, you referred to JavaScript, so I created a document to which I added a snippet of document-level JavaScript:
writer.addJavaScript("this.baseURL = \"http://itextpdf.com/\";");
This works perfectly in Adobe Acrobat, but when you try this in Adobe Reader, you get the following error:
NotAllowedError: Security settings prevent access to this property or
method. Doc.baseURL:1:Document-Level:0000000000000000
This is consistent with the JavaScript reference for Acrobat where it is clearly indicated that special permissions are needed to change the base URL.
So instead of following your suggested path, I consulted ISO-32000-1 (which was what I asked you to do, but... I've beaten you in speed).
I discovered that you can add a URI dictionary to the catalog with a Base entry. So I wrote a second example, BaseURL2, where I add this dictionary to the root dictionary of the PDF:
PdfDictionary uri = new PdfDictionary(PdfName.URI);
uri.put(new PdfName("Base"), new PdfString("http://itextpdf.com/"));
writer.getExtraCatalog().put(PdfName.URI, uri);
Now the BaseURL works in both Acrobat and Reader.
Assuming that you want to add a BaseURL to existing documents, I wrote BaseURL3. In this example, we add the same dictionary to the root dictionary of an existing PDF:
PdfReader reader = new PdfReader(src);
PdfDictionary uri = new PdfDictionary(PdfName.URI);
uri.put(new PdfName("Base"), new PdfString("http://itextpdf.com/"));
reader.getCatalog().put(PdfName.URI, uri);
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(dest));
stamper.close();
Using this code, you can change a link that points to "index.php" (base_url.pdf) into a link that points to "http://itextpdf.com/index.php" (base_url_3.pdf).
Now you can replace your Adobe license with a less expensive iTextSharp license ;-)

Assigning an Existing Custom Layout/Navigator to a Portfolio Generated By iTextSharp

I am generating collections (Acrobat Portfolios) via iTextSharp. I would like to assign an existing custom navigator (custom layout) to the generated collection. I believe iTextSharp allows for the CUSTOM parameter to define a custom navigator, as in the last code line of this block:
Document document = new Document();
FileStream stream = new FileStream(portfolioPath, FileMode.Create);
PdfWriter writer = PdfWriter.GetInstance(document, stream);
document.Open();
document.Add(new Paragraph(" "));
PdfCollection collection = new PdfCollection(PdfCollection.CUSTOM);
//The integer 3 can also substitute for PdfCollection.CUSTOM
However, when the collection/portfolio is generated the CUSTOM parameter inserts the TILE layout within the generated collection. I want to have the CUSTOM parameter use a custom .nav navigator I developed to insert a custom layout.
I located this post on SO:
How to embed a .nav file into pdf portfolio?
which lead to:
Adobe® Supplement to the
ISO 32000
BaseVersion: 1.7
ExtensionLevel: 3e
Pages 34 - 37 of this document says it is possible to have the collection access the custom navigator by adjusting the Navigator entry in the collection dictionary and the navigator dictionary itself. Additionally, page 541 of the Second Edition of iText in Action implies this is possible (and it is my hope what is possible in iText is also possible in iTextSharp).
So is it possible -- using iTextSharp -- to have a generated collection/portfolio access and implement a custom layout/navigator? If so, how? Or is there another way to do this via C# and/or through some workaround? All help is greatly appreciated.

I found a different way to dictate the custom layout/navigator using iTextSharp. Instead of defining the custom layout during or after
PdfCollection collection = new PdfCollection(PdfCollection.CUSTOM);
I threw out the code listed in my question and used the iTextSharp stamper.
First, I created an empty portfolio file. Within this file I assigned the custom layout that I wanted to use. When opened the file displays the layout, but contains no attached files. This file will serve as a template and assign it's navigator to each newly created iTextSharp PDF using this code:
const string templatePath = #"C:\PortfolioTemplate\PortfolioTemplate.pdf"; //this file will contain the custom navigator/layout for the new pdf
const string portfolioPath = #"C:\OutputFile\NewPortfolio.pdf";
string[] packageitems = { file-to-add-to-collection };
PdfReader reader = new PdfReader(templatePath);
FileStream outputstream = new FileStream(portfolioPath, FileMode.Create);
PdfStamper stamp = new PdfStamper(reader, outputstream);
PdfFileSpecification fs = PdfFileSpecification.FileEmbedded(stamp.Writer, packageitems[0], packageitems[0], null);
stamp.AddFileAttachment(packageitems[0], fs);
stamp.Close();
I used the above proof of concept to loop through all the files in a directory folder and I have created large portfolios without issue that are styled using the custom navigator/layout I wanted.
After coming up with the idea of using a template to pass the navigator into a newly created portfolio, I used the code in the below link to guide me to the above conclusion:
http://itextsharp.10939.n7.nabble.com/Attach-file-td3812.html