In my application, option is there to upload multiple attachments, that can be png, jpg, doc or .xlsx and its working fine using .Net MVC.
Now I want to merge all these attachments into a single PDF. Is that possible using .net MVC?
Yes, you can use: pdfsharp.
PDFsharp is a .NET library for processing PDF file. You create PDF pages using drawing routines known from GDI+. Almost anything that can be done with GDI+ will also work with PDFsharp. Only basic text layout is supported by PDFsharp, and page breaks are not created automatically. The same drawing routines can be used for screen, PDF, or meta files
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On the project, we keep our fonts in Azure Blob Storage and not with the project files themselves. I usually add them via #font-face, then use them in ASP.NET Razor files that make up the PDF. my current task is to embed the fonts directly to the PDF, the idea being that right now when selecting text from the PDF and looking for the font, it shows me a seemingly unrelated string as its name. for example:
I'm using SelectPdf library to make the pdf itself. I was wondering how to embed the fonts I'm using into the pdf.
I want to perform OCR on png and pdf files.I am able to get Tesseract 3.0.2 .net wrapper work for png files but I can't find any class in it for PDf files.So, does it work for the pdf files.If not then please let me know any other open source library for scanning pdfs. My requirement is scanning diagrams in a pdf for specific circles, and creating hyperlinks for those circles.
No, it doesn't. You'll have to extract the images from the pdf first. This can be done using pdfimages pdfimages.exe -j your.pdf or gs as suggested by Zakk Diaz.
I have about 400 ebooks, all in PDF format, and my task is to extract the cover from every one of them (which is the first page of every PDF) and export them all as separate image (PNG or JPEG) files
So I will end up with 400 ebooks and 400 images of their covers.
I have Windows
Any advice greatly appreciated.
Use ghostscript to render tiff or jpg from the pdf. You have fine grained control over the result.
If this is a commercial application, you need a commercial license. If you use the application commercially, but inside your organisation, you are allowed to use the GPLed version of ghostscript.
Ghostscript can be found here. The PDF interpreter in many opensource packages relies on the gs PDF interpreter. Imagemagick for example, requires ghostscript libraries.
Download GS here: http://ghostscript.com/download/gsdnld.html
Use C# Process class to execute Ghostscript, there is a SO topic on this here How to run a C# console application with the console hidden
The commandline for tiff will be:
D:\gs\gs9.20>bin\gswin64c.exe -sOutputFile=d:\some%02d.tiff -dBATCH -dNOPAUSE -sDEVICE=tiff24nc -sCompression=lzw -r150 -sPageList=1 d:\PDFReference.pdf
This will create one some01.tiff file on d:\ in 150dpi resolution.
The following thread is suitable for your request. converting pdf file to an jpeg image
One solution is to use a third party library. ImageMagick is a very popular, freely available too. You can get a .NET wrapper for it here. The original ImageMagick download page is here.
http://www.codeproject.com/KB/library/pdftoimages.aspx Convert PDF pages to image files using the Solid Framework
http://www.print-driver.com/howto/convert_pdf_to_jpeg.html Universal Document Converter
http://www.makeuseof.com/tag/6-ways-to-convert-a-pdf-file-to-a-jpg-image/ 6 Ways To Convert A PDF To A JPG Image
And you also can take a look at this thread: how to open a page from a pdf file in pictureBox in C#
If you use this process to convert a PDF to tiff, you can use this class to retrieve the bitmap from tiff.
I need to create a software which will create print previews of the documents of following formats: the MS Office documents (.doc(x), .ppt(x), .xls(x)), images, .txt files and PDF files. I have made a working prototype using XPS files. So basically I do the following: I convert the office files to .xps using Office Automation and then I render the .xps documents to images. I simply create XPS files from images and .txt by adding text or an image to FlowDocument, then rendering it. But I have found out that there is no way to convert PDF to XPS fast (A document which has 600 pages takes more than 2 minutes to convert and this is totally not suitable). So I am stuck at this point. It seems that I should start over again, using the different file format. Should I rewrite my program using PDF, for example, or is there any other way to accomplish my task? And if I should use PDF, could you, please, suggest me a good PDF C# library to render previews of pages as fast as possible? I tried using Websupergoo's ABCPdf, but it is too slow, because it does not allow me to render the previews to System.Windows.Media.Imaging.BitmapSource, only System.Drawing.Bitmap, so I have to convert Bitmap to BitmapSource and it takes up a lot of time.
Thanks in advance.
Use Ghostscipt to convert PDF to images. Though, I don't know why you wouldn't just use the PDF. I have used GhostScript for a number of PDF/Image manipulation tasks.
http://www.wibit.net/blog/integrating_ghostscript_c
Ghostscript will output any PDF to images to the settings you specify. I think you can use it as a DLL or as a commandline process.
I am generating PDF documents using DevExpress XtraReports.
I am using the same image over and over (in rows of status lights).
The PDF generated seems to duplicate the image definition for each image included. I would prefer if it included the image once and referenced it wherever it needed another copy - this would drastically reduce the size of my PDF docs.
Is there any way to achieve this using DevExpress or even post processed via a third party application. Any help is appreciated.
Two options:
OPT1: I suppose your image is a background or a company logo and the image is the same on all the pages of the pdf. If yes, then create the pdf without the image. Post-process the pdf and add the image on all the pages (you can do that using itext/itextsharp or pdflib).
OPT2: take your actual pdf and convert it using Ghoscript. Using Ghsoscript you can do a "pdf to pdf" conversion. During the conversion Ghostscript try to identify repeated images and removes them. The resulting file is smaller. (Ghostscript is not always able to do that... try with you pdf file).
It is possible to re-use the same image content in multiple locations throughout your document. But it's a fair bit easier to do this while adding the image(s) to the PDF.
I'm not sure if DevExpress supports this.