How to compress pdf file with multiple page using .net c#?

Dastaan

13y2kWindows Forms

Hi,

I need to compress pdf file with more than 5 page in project , how can i compress pdf in asp.net c# ?

Please help.

Thanks

dastaan

4 Replies

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Kip Hackman5y ago
You can use LEADTOOLS PDF Pro SDK technology in your application.
https://www.leadtools.com/sdk/products/pdf-pro
You can leverage the PDFFile class coupled with the PDFOptimizerOptions to compress and optimize the PDF file to quickly and efficiently reduce the size while preserving as much of the original file's quality as possible.
Here is some sample code:
new PDFFile(srcPath)
{
   OptimizerOptions = new PDFOptimizerOptions
   {
      AutoOptimizerMode = PDFAutoOptimizerMode.Customized,
      ColorImageDownsamplingMode = PDFDownsamplingMode.Bicubic,
      GrayImageDownsamplingMode = PDFDownsamplingMode.Bicubic,
      MonoImageDownsamplingMode = PDFDownsamplingMode.Bicubic,
      ColorImageDownsampleFactor = 2.0,
      GrayImageDownsampleFactor = 2.0,
      MonoImageDownsampleFactor = 2.0,
      ColorImageDPI = 150,
      GrayImageDPI = 150,
      MonoImageDPI = 150,
      ColorImageCompression = RasterImageFormat.Jpx,
      GrayImageCompression = RasterImageFormat.Jpeg,
      MonoImageCompression = RasterImageFormat.Jbig2,
      EmbedAllFonts = true,
      SubsetFonts = true
   }
}.Optimize(dstPath);
Vishwakarma Vijay5y ago
Try this - https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Document-in-C-VB.NET.html

It allows you to compress images as well as other content in a PDF document in .NET.
Jignesh Kumar5y ago
Hi Dastan,

Please use ItextSharp library to achieve this one,

HTML
"fileUpload" runat="server" />
"btnCompress" Text="Compress" runat="server" OnClick="CompressPdf" />
Button click event
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;

protected void CompressPdf(object sender, EventArgs e)
{
    if (fileUpload.HasFile)
    {
        if (fileUpload.PostedFile.ContentLength > 0)
        {
            string pdfFile = fileUpload.PostedFile.FileName;
            PdfReader reader = new PdfReader(pdfFile);
            PdfStamper stamper = new PdfStamper(reader, new FileStream(@"C:\Users\dharmendra\Desktop\pdfCompressTest.pdf", FileMode.Create), PdfWriter.VERSION_1_5);
            stamper.FormFlattening = true;
            stamper.SetFullCompression();
            stamper.Close();
        }
    }
}
Salman Beg5y ago
Check this link, https://www.c-sharpcorner.com/forums/what-is-the-best-way-to-compress-pdf-file-size https://stackoverflow.com/questions/13719553/compress-existing-pdf-using-c-sharp-programming-using-freeware-libraries