Convert a string into BASE62

问题

I'm looking for the c# code to convert a string into BASE62, like this:

http://www.molengo.com/base62/title/base62-encoder-decoder

I need those encode and decode-methods for URL-Encoding.

回答1:

Try the C# library available here which adds some extension methods to allow you to convert a byte array to and from BASE62.

• https://github.com/renmengye/base62-csharp

If your source data is contained in a "string" then you would first need to convert your "string" to a suitable byte array.

But be careful, to use the correct string to byte conversion call....as you may want the bytes to be the ASCII characters, or the Unicode byte stream etc i.e. Encoding.GetBytes(text) or System.Text.ASCIIEncoding.ASCII.GetBytes(text);, etc

byte[] bytestoencode = ..... 

string encodedasBASE62 = bytestoencode.ToBase62();

.....

byte[] bytesdecoded = encodedasBASE62.FromBase62();

回答2:

You can do this for any base, this way:

static string ToBase62(ulong number)
{
var alphabet = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var n = number;
ulong basis = 62;
var ret = "";
while (n > 0)
 {
   ulong temp = n % basis;
   ret = alphabet[(int)temp] + ret;
   n = (n / basis);

 }
 return ret;
}

回答3:

not the real answer but hopefully this helps you to build a C# Version of it:

Javascript Base62 Encode/Decode:

http://x443.wordpress.com/2012/03/18/javascript-base62-encode-decode/

来源：https://stackoverflow.com/questions/17745025/convert-a-string-into-base62