Question

我希望能够打开文件，读取字节，添加值（我的加密密钥）并将其写入新文件。所以我的问题是这种方法还可以吗？

const int ENCRYPE_KEY = 12345;
static void Encrypt(string fileName)
{
    using (FileStream streamToRead = File.OpenRead(fileName))
    {
        using (BinaryReader reader = new BinaryReader(streamToRead))
        {
            using (FileStream streamToWrite = File.Create(@"D:\temp\encrypted.jpg"))
            {
                using (BinaryWriter writer = new BinaryWriter(streamToWrite))
                {
                    for (int i = 0; i < streamToRead.Length; i++)
                    {
                        byte b = reader.ReadByte();
                        writer.Write((byte)(b + ENCRYPE_KEY));
                    }
                }
            }
        }
    }
}

Answer 1

而不是箭头反模式我建议使用 Linq 查询（如果文件足够小 - ReadAllBytes - 以适应内存）：

   var target = File
     .ReadAllBytes(fileName)
     .Select(b => (byte)(unchecked(b + ENCRYPE_KEY))) // do not forget to allow overflow
     .ToArray();

   File.WriteAllBytes(@"D:\temp\encrypted.jpg", target);

Answer 2

你可以这样做。对我来说似乎更清洁。

        byte[] data = File.ReadAllBytes(fileName);
        using (FileStream streamToWrite = File.Create(@"D:\temp\encrypted.jpg"))
        using (BinaryWriter writer = new BinaryWriter(streamToWrite))
        {
            for (int i = 0; i < data.Length; i++)
            {
                writer.Write((byte)(data[i] + ENCRYPE_KEY));
            }
        }

将所有这些流放在一起可以吗？

2 个答案: