文件和字节流的相互转换
1、读取文件,并转换为字节流
FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
byte[] infbytes = new byte[(int)fs.Length];
fs.Read(infbytes, 0, infbytes.Length);
fs.Close();
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return infbytes;
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2、将字节流写入文件
FileStream fs = new FileStream("D:\\inf.dlv", FileMode.Create, FileAccess.Write);
fs.Write(inf, 0, inf.Length);
fs.Close();
FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
byte[] infbytes = new byte[(int)fs.Length];
fs.Read(infbytes, 0, infbytes.Length);
fs.Close();
return infbytes;

FileStream fs = new FileStream("D:\\inf.dlv", FileMode.Create, FileAccess.Write);
fs.Write(inf, 0, inf.Length);
fs.Close();
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