如何在VB.net中使用iTextSharp减小PDF图像的大小 [英] How to reduce PDF images size with iTextSharp in VB.net

问题描述

大家好，

i需要打开一个pdf文件并缩小尺寸！



我写了这段代码：

Hi guys,
i need to open a pdf file and reduce size!

I wrote this code:

Dim pdfFile As String = "D:\pdf\1.pdf"
Dim reader As New PdfReader(pdfFile)
Dim stamper As New PdfStamper(reader, New FileStream("D:\pdf\1c.pdf", FileMode.Create), PdfWriter.VERSION_1_5)

Document.Compress = True

stamper.FormFlattening = True
stamper.SetFullCompression()

stamper.Close()

但是我获得了一份与原版相同尺寸的新pdf文件。



我应该用pdf压缩图像吗？如果怎么做？



非常感谢！

Alex

But i obtain a new pdf file with same size of original.

Should i compress images in pdf? In case how to do this?

Thanks a lot!
Alex

推荐答案

http://www.dotnetspark.com/kb/1807-pdf-compression -by-itexsharp.aspx [ ^ ]

如何使用c＃和iTextSharp 优化（压缩）pdf [ ^ ]

http：//forums.asp .net / t / prev / 1857554 [ ^ ]

http://www.dotnetspark.com/kb/1807-pdf-compression-by-itexsharp.aspx[^]
How to optimize(compress) pdf using c# and iTextSharp[^]
http://forums.asp.net/t/prev/1857554[^]

如果您真的想减小PDF的大小，请查看Aspose.PDF：

http://www.aspose.com/docs/display/pdfnet/Optimize+PDF+file+size [ ^ ]



我能够将尺寸缩小约5.6倍（100页从16.8MB减少到3MB）

If you're really looking to reduce the size of PDF's look at Aspose.PDF:
http://www.aspose.com/docs/display/pdfnet/Optimize+PDF+file+size[^]

I was able to reduce the size by about 5.6 times (100 pages went from 16.8MB down to 3MB)

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