C # 4.0: 将 pdf 转换为 byte [] ，反之亦然

// loading bytes from a file is very easy in C#. The built in System.IO.File.ReadAll* methods take care of making sure every byte is read properly.
// note that for Linux, you will not need the c: part
// just swap out the example folder here with your actual full file path
string pdfFilePath = "c:/pdfdocuments/myfile.pdf";
byte[] bytes = System.IO.File.ReadAllBytes(pdfFilePath);


// munge bytes with whatever pdf software you want, i.e. http://sourceforge.net/projects/itextsharp/
// bytes = MungePdfBytes(bytes); // MungePdfBytes is your custom method to change the PDF data
// ...
// make sure to cleanup after yourself


// and save back - System.IO.File.WriteAll* makes sure all bytes are written properly - this will overwrite the file, if you don't want that, change the path here to something else
System.IO.File.WriteAllBytes(pdfFilePath, bytes);

最简单的方法:

byte[] buffer;
using (Stream stream = new IO.FileStream("file.pdf"))
{
buffer = new byte[stream.Length - 1];
stream.Read(buffer, 0, buffer.Length);
}


using (Stream stream = new IO.FileStream("newFile.pdf"))
{
stream.Write(buffer, 0, buffer.Length);
}

或者类似的东西..。

using (FileStream fs = new FileStream("sample.pdf", FileMode.Open, FileAccess.Read))
{
byte[] bytes = new byte[fs.Length];
int numBytesToRead = (int)fs.Length;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = fs.Read(bytes, numBytesRead, numBytesToRead);


// Break when the end of the file is reached.
if (n == 0)
{
break;
}


numBytesRead += n;
numBytesToRead -= n;
}
numBytesToRead = bytes.Length;
}