COM pressing PDF文件使得它更大 [英] compressing pdf file makes it bigger

问题描述

我COM preSS上传 .PDF 文件并将其保存到服务器的文件系统。一切正常，但文件变大，从30KB到48KB。什么可能我是做错了什么？这里的code部分，我COM preSS上传的文件：

 的FileStream的SourceFile = System.IO.File.OpenRead（文件路径）;
的FileStream destFile = System.IO.File.Create（zipPath）;
GZipStream compStream =新GZipStream（destFile，COM pressionMode.Com preSS）;尝试
{
    INT theByte = sourceFile.ReadByte（）;
    而（theByte！= -1）
    {
        compStream.WriteByte（（字节）theByte）;
        theByte = sourceFile.ReadByte（）;
    }
}
 

解决方案

我想这个问题是 GZipLib 在这里。我用 DotNetZip 而不是和现在预期的文件变得更小。它可以在这里下载 。

I compress the uploaded .pdf files and save them to server's file system. Everything works well, but the file gets bigger, from 30kb to 48kb. What could I be doing wrong? Here's the code part I compress the uploaded file:

FileStream sourceFile = System.IO.File.OpenRead(filePath);
FileStream destFile = System.IO.File.Create(zipPath);
GZipStream compStream = new GZipStream(destFile, CompressionMode.Compress);

try
{
    int theByte = sourceFile.ReadByte();
    while (theByte != -1)
    {
        compStream.WriteByte((byte)theByte);
        theByte = sourceFile.ReadByte();
    }
}

解决方案

I guess the problem is with GZipLib here. I used DotNetZip instead and file gets smaller as expected now. It can be downloaded here.

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