How to compress (reduce the size) file in c#

You can try LEADTOOLS Document SDK. With LEADTOOLS you can load, view, save, convert, and compress PDF files. Using the PDFOptimizerOptions Class and the Optimize Method you can efficiently reduce the size of PDF files while preserving as much of the original file's quality as possible. The code is as simple as this:

using (RasterCodecs codecs = new RasterCodecs())

{

string sourceFile = @"C:\Temp\1.pdf";

var info = codecs.GetInformation(sourceFile, true);

pdfFile = new PDFFile(sourceFile);

var currentOptions = new PDFOptimizerOptions();

currentOptions.AutoOptimizerMode = PDFAutoOptimizerMode.BestSize;

pdfFile.OptimizerOptions = currentOptions;

string exportFile = @"C:\Temp\OptimizedPDF.pdf";

pdfFile.Optimize(exportFile);

}

For more information, see the following links:

https://www.leadtools.com/help/leadtools/v20/dh/pdf/pdffile.html

https://www.leadtools.com/help/leadtools/v20/dh/pdf/pdfoptimizeroptions.html

https://www.leadtools.com/help/leadtools/v20/dh/pdf/pdffile-optimize.html

You can also find a forums post including a sample project, written in C#, to compress and optimize PDF file at the following link:

https://www.leadtools.com/support/forum/posts/t12408-

Hi,

 

You can try using Spire.PDF to compress PDF file. Check the below links:

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Images-in-C-VB.NET.html

 

https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Document-in-C-VB.NET.htmlhttps://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Document-Operation/How-to-Compress-PDF-Document-in-C-VB.NET.html 

Following link can be helpful for you.

 

https://www.aspforums.net/Threads/151080/Compress-PDF-File-Size-in-ASPNet-using-C-and-VBNet/