When load and saving a PDF, is there a way to compress it?

[Sungkyu_min]

Hi..

I found that to compress the size of a PDF, you need to use a method like it.
`PdfCompressor compressor = new PdfCompressor(pdfPath);
compressor.CompressToFile("Compressed.pdf");
`.

Is there a way to compress a PDF when loading it, performing a specific task, and saving it?
Before saving, there was a compression option, but it didn't work.

Code: Select all

PdfDocument doc = new PdfDocument();
doc.LoadFromFile(fileName);

//..... some task

doc.CompressionLevel = PdfCompressionLevel.Best; // is not working
doc.SaveToFile(fileName);


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Add content

Also, when using `PdfCompressor`, the compression rate seems to be too high even though the ImageQuality is set to high (4.33MB -> 670KB). There are some images in my PDF file, but the image resolution seems to be lowered too much. I want about half the compression ratio, is there a higher option?

Code: Select all

            PdfCompressor compressor = new PdfCompressor(fileName);
            compressor.Options.ImageCompressionOptions.CompressImage = true;
            compressor.Options.ImageCompressionOptions.ImageQuality = ImageQuality.High;
            compressor.Options.ImageCompressionOptions.ResizeImages = true;
            compressor.Options.TextCompressionOptions.CompressFonts = true;
            compressor.Options.RemoveMetadata = true;
            compressor.CompressToFile(saveName);


[Ula.wang]

Hi,

Thank you for your inquiry.
You can refer to the following link to help you achieve the effect of compressing document. If the issue still exists, please offer your file to help us do further investigation, you can attach here or send it to us via email ([email protected] ). Thank you in advance.

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

Sincerely,
Ula
E-iceblue support team