将文件转换为Base64String，然后再转换回来

Question

标题说明了一切：

null

Boolean MyMethod(){
    using (StreamReader sr = new StreamReader("C:\...\file.tar.gz")) {
        String AsString = sr.ReadToEnd();
        byte[] AsBytes = new byte[AsString.Length];
        Buffer.BlockCopy(AsString.ToCharArray(), 0, AsBytes, 0, AsBytes.Length);
        String AsBase64String = Convert.ToBase64String(AsBytes);

        byte[] tempBytes = Convert.FromBase64String(AsBase64String);
        File.WriteAllBytes(@"C:\...\file_copy.tar.gz", tempBytes);
    }
    FileInfo orig = new FileInfo("C:\...\file.tar.gz");
    FileInfo copy = new FileInfo("C:\...\file_copy.tar.gz");
    // Confirm that both original and copy file have the same number of bytes
    return (orig.Length) == (copy.Length);
}

编辑：工作示例要简单得多（多亏了@T.S.):

Boolean MyMethod(){
    byte[] AsBytes = File.ReadAllBytes(@"C:\...\file.tar.gz");
    String AsBase64String = Convert.ToBase64String(AsBytes);

    byte[] tempBytes = Convert.FromBase64String(AsBase64String);
    File.WriteAllBytes(@"C:\...\file_copy.tar.gz", tempBytes);

    FileInfo orig = new FileInfo(@"C:\...\file.tar.gz");
    FileInfo copy = new FileInfo(@"C:\...\file_copy.tar.gz");
    // Confirm that both original and copy file have the same number of bytes
    return (orig.Length) == (copy.Length);
}

谢谢！

Answer 1

如果您出于某种原因想将文件转换为base-64字符串。比如如果你想通过互联网传递，等等。你能做到的

Byte[] bytes = File.ReadAllBytes("path");
String file = Convert.ToBase64String(bytes);

相应地，读回文件：

Byte[] bytes = Convert.FromBase64String(b64Str);
File.WriteAllBytes(path, bytes);