C＃轉換文件到Base64String，然後再返回

Question

的標題說明了一切：

1. 我在tar.gz壓縮讀像這樣
2. 斷裂文件轉換成字節數組
3. 轉換這些字節爲Base64字符串
4. 轉換是Base64編碼字符串回字節數組
5. 寫這些字節返回到一個新的tar.gz文件

我可以確認這兩個文件的大小相同（以下方法返回true），但我無法再提取複製版本。

我錯過了什麼嗎？

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); 
} 

編輯：工作的例子是簡單得多（感謝@ 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); 
} 

謝謝！

Answer 1

如果你想出於某種原因將你的文件轉換爲base-64字符串。就像如果你想通過互聯網來傳遞，等等......你可以做到這一點

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

相應的，讀迴文件：

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

Answer 2

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; 
} 

encode a file into base64 format in java