如何解决"base64无效字符"?错误? [英] How can I solver an "base64 invalid characters" error?

问题描述

当我尝试使用以下代码将value1转换为byte []时:

When I m trying to convert the value1 to byte[] using the following code:

string value1 = "4rdHFh%2BHYoS8oLdVvbUzEVqB8Lvm7kSPnuwF0AAABYQ%3D";
byte[] value2 = Convert.FromBase64String(value1);

我收到一个错误，指出字符串内容无效的base-64字符...

Ι received an error that the string contents invalid base-64 characters...

怎么了?

谢谢！

推荐答案

来自

s由基数64位数字，空格字符和结尾 填充字符. 从零开始的64位基数升序 是大写字符"A"至"Z"，小写字符"a"至 "z"，数字"0"到"9"以及符号"+"和"/" .

s is composed of base 64 digits, white space characters, and trailing padding characters. The base 64 digits in ascending order from zero are the uppercase characters 'A' to 'Z', lowercase characters 'a' to 'z', numerals '0' to '9', and the symbols '+' and '/'.

%不允许采用 base64 编码.

% is not allowed in base64 encoding.

从 Wikipedia 中查看 Base64索引表/p>

Value   Char
0   A   16  Q   32  g   48  w
1   B   17  R   33  h   49  x
2   C   18  S   34  i   50  y
3   D   19  T   35  j   51  z
4   E   20  U   36  k   52  0
5   F   21  V   37  l   53  1
6   G   22  W   38  m   54  2
7   H   23  X   39  n   55  3
8   I   24  Y   40  o   56  4
9   J   25  Z   41  p   57  5
10  K   26  a   42  q   58  6
11  L   27  b   43  r   59  7
12  M   28  c   44  s   60  8
13  N   29  d   45  t   61  9
14  O   30  e   46  u   62  +
15  P   31  f   47  v   63  /

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