itext7

问题 Can I render a PDF Page to a real image object (e.g. BufferedImage) using IText 7? 回答1: If you really want to do this, consider using GhostScript. Ghostscript is a suite of software based on an interpreter for Adobe Systems' PostScript and Portable Document Format (PDF) page description languages. Its main purposes are the rasterization or rendering of such page description language files, for the display or printing of document pages, and the conversion between PostScript and PDF files. --

问题 I am using Itext 7.1.6 to generate the PDF. When I try to run , I get this error document was closed . It is impossible to execute the action. I checked solutions in stackoverflow for this but they are saying it is related to fonts. I modified the fonts by creating instance every time I use it but even then I get same issue. I am unable to figure out how I can resolve this issue. Can anyone please help me to fix it ? Please find the below code and exception Document doc = null; PdfPage

问题 I am fairly new to iText. I downloaded a free 30 day trial and tried the following on .NET MVC: 1. Extract fields from PDF form: string src = "mypdf.pdf"; string dest = "mypdfRES.pdf"; PdfReader newReader = new PdfReader(src); newReader.SetUnethicalReading(true); PdfDocument pdf = new PdfDocument(newReader, new PdfWriter(dest)); PdfAcroForm form = PdfAcroForm.GetAcroForm(pdf, true); IDictionary<String, PdfFormField> fields = form.GetFormFields(); After that I set a value to a specific field

问题 I am trying to add some "multiple rows and columns"'s cell to table, but got IndexOutOfBoundsException. Any help will be greatly appreciated. Thanks! public static void main(String[] args) throws FileNotFoundException { PdfWriter writer = new PdfWriter("D:\\test.pdf"); PdfDocument pdf = new PdfDocument(writer); Document document = new Document(pdf); Table table = new Table(10); table.setWidthPercent(100); table.addCell(new Cell(1, 3).add(new Paragraph(1 + "_" + 3 + "_"))); table.addCell(new

问题 I am using iText7 to create a document which has multiple sections. Some of the sections are to be formatted normally, but some are to be formatted into columns. I can get it to format properly into columns by using the ColumnDocumentRenderer object, but when I do so, the entire document is set to use columns. Is there any way to have iText swap which renderer to use on the fly? When I try to swap out renderers on the fly, I get a null pointer exception (com.itextpdf.kernel.pdf.PdfDictionary

问题 I have to create a tool which adds to several .pdf file names their creation date. I'd like to use the creationdate stored internally in pdfs and for this I downloaded iText Community Edition. Now, my code starts like this (VB) Module Module1 Sub Main() Dim filename As String = My.Application.CommandLineArgs(0) Dim PDFReader = New Pdf.PdfReader(filename) Dim PDFDocument = New Pdf.PdfDocument(PDFReader) Dim documentinfo As Pdf.PdfDocumentInfo = PDFDocument.GetDocumentInfo Dim author As String

问题 So I am alreay searching about this the entire day and I just don't know how to get it working. Basically I want to create a PDF server side with iText 7 in my ASP.Net WebApi. Very straightforward and easy Pdf creation: [HttpGet] public HttpResponseMessage CreateLieferschein() { MemoryStream stream = new MemoryStream(); PdfWriter writer = new PdfWriter(stream); var pdf = new PdfDocument(writer); var document = new Document(pdf); document.Add(new Paragraph("Hello World!")); } From here on I

问题 I know similar questions have been asked before, however, they are hideously out of date (some going back to 2006). I have a .net 3.5 app (w/ iTextSharp 5) I am converting to .net core (iText 7) which extracts signatures from FedEx tracking documents, sent in a byte[] array via a SOAP service. This code has worked very well for many years now with minor updates. There are a couple of images in the PDF document returned from Fedex but the signature block is not the 110x46 image (which is the

问题 Project is to fill existing forms programmatically from a database/datagridview and allow the user to edit the forms afterwards as the database does not hold all values needed. I am able to get the values, and put them into the form however: Values set using AcroForms do not show/print when viewing form. Background color change does not show when viewing form. Both changes appear when clicking into the field. I understand this is caused by hybrid XFA and AcroForms issues, and that pdfXFA is a

问题 I would like to add and remove a watermark to a PDF using iText 7. I was able to add the watermark, but unable to remove it again. I could only find relevant code/examples related to iText 5. Any pointers appreciated, thanks. This is how I added the Watermark (using Layers): pdfDoc = new PdfDocument(new PdfReader(sourceFile), new PdfWriter(destinationPath)); var numberOfPages = pdfDoc.GetNumberOfPages(); PageSize ps = pdfDoc.GetDefaultPageSize(); for (var i = 1; i <= numberOfPages; i++) {