SpirePDF/FreeSpire.PDF - Githubissues

.NET Library for Processing & Manipulating PDF Files

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Free Spire.PDF for .NET is a Community Edition of the Spire.PDF for .NET, which is a totally free PDF API for commercial and personal use.

As a standalone .NET library, Free Spire.PDF for .NET enables developers to create, write, edit, convert, print, handle and read PDF files on any .NET( C#, VB.NET, ASP.NET, .NET Core) applications.

PDF Processing Features.

Generate/write/read/edit PDF documents.
Supports 14 core, Type 1, True Type, Type 3, CJK & Unicode fonts.
Extract images, text, pages and attachments from a PDF document with great speed and accuracy.
Merge/split PDF documents and overlay documents.
Convert HTML, XPS, Text and images to PDF and convert PDF to Excel,Word,images with efficient performance.
Encrypt/Decrypt PDF, modify PDF passwords and create PDF digital signatures.
Add and modify text/image bookmarks.
Add text in Footer/Header.
Export database table and pictures to PDF.
Add Hyperlinks, work with actions/Javascript Action/Action Chain/Action Annotation.
Add/remove/edit/fill fields.

Conversions

Support Environment

Fully written in C# and also support VB.NET.
Applied on .NET Framework 2.0, 3.5, 3.5 Client Profile, 4.0, 4.0 Client Profile,4.5 and .NET Standard 2.0, .NET Core, .NET 5.0, MonoAndroid and Xamarin.Ios.
Support Windows Forms and ASP.NET Applications.
Support 32-bit OS
Support 64-bit OS
Support PDF Version 1.2, 1.3, 1.4, 1.5, 1.6 and 1.7.
PDF API reference in HTML.
Be Independent and do not need Adobe Acrobat or other third party PDF libraries.

Convert PDF to DOC in C

            //Create a PDF document and load sample PDF.
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile("test.pdf");

            //Use SaveToFile method and set conversion target parameter as FileFormat.DOC.
            doc.SaveToFile("PDFtoDoc.doc", FileFormat.DOC);

Convert PDF to images in C

            //Create a PDF document and load sample PDF.
            PdfDocument doc = new PdfDocument();
            doc.LoadFromFile("sample.pdf");

            Image bmp = doc.SaveAsImage(0);
            Image emf = doc.SaveAsImage(0, Spire.Pdf.Graphics.PdfImageType.Metafile);
            Image zoomImg = new Bitmap((int)(emf.Size.Width * 2), (int)(emf.Size.Height * 2));
            using (Graphics g = Graphics.FromImage(zoomImg))
            {
                g.ScaleTransform(2.0f, 2.0f);
                g.DrawImage(emf, new Rectangle(new Point(0, 0), emf.Size), new Rectangle(new Point(0, 0), emf.Size), GraphicsUnit.Pixel);
            }
            //Save as BMP
            bmp.Save("convertToBmp.bmp", ImageFormat.Bmp);
            System.Diagnostics.Process.Start("convertToBmp.bmp");

            //Save as EMF
            emf.Save("convertToEmf.png", ImageFormat.Png);
            System.Diagnostics.Process.Start("convertToEmf.png");

            //Save as ZoomImg
            zoomImg.Save("convertToZoom.png", ImageFormat.Png);
            System.Diagnostics.Process.Start("convertToZoom.png");

Convert HTML to PDF in C

            //Create a pdf document.
            PdfDocument doc = new PdfDocument();

            PdfPageSettings setting = new PdfPageSettings();

            setting.Size = new SizeF(1000,1000);
            setting.Margins = new Spire.Pdf.Graphics.PdfMargins(20);

            PdfHtmlLayoutFormat htmlLayoutFormat = new PdfHtmlLayoutFormat();
            htmlLayoutFormat.IsWaiting = true;

            String url = "https://www.wikipedia.org/";

            Thread thread = new Thread(() =>
            { doc.LoadFromHTML(url, false, false, false, setting,htmlLayoutFormat); });
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            thread.Join();

            //Save pdf file.
            doc.SaveToFile("output-wiki.pdf");