C#将文件转换成Base64String并返回

标题说明了一切:

  1. 我读了tar.gz这样的档案
  2. 将文件分解成一个字节数组
  3. 将这些字节转换为Base64string
  4. 将该Base64string转换回字节数组
  5. 把这些字节写回新的tar.gz文件

我可以确认两个文件大小相同(下面的方法返回true),但我不能再提取复制版本。

我错过了什么吗?

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(感谢@TS):

 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!

如果你想出于某种原因将你的文件转换为base-64string。 就像如果你想通过互联网传递等等,你可以做到这一点

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

相应地,回读文件:

 Byte[] bytes = Convert.FromBase64String(b64Str); File.WriteAllBytes(path, bytes); 
 private String encodeFileToBase64Binary(File file){ String encodedfile = null; try { FileInputStream fileInputStreamReader = new FileInputStream(file); byte[] bytes = new byte[(int)file.length()]; fileInputStreamReader.read(bytes); encodedfile = Base64.encodeBase64(bytes).toString(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return encodedfile; } 

在java中将文件编码为base64格式