base63 url decode - CSharp System

CSharp examples for System:String Base

  1. HOME
  2. CSharp
  3. System
  4. String Base

Description

base63 url decode

Demo Code


using System;/*from  ww  w.jav a  2s .  com*/

public class Main{
        public static byte[] base64urldecode(string arg)
        {
            string s = arg;
            s = s.Replace('-', '+'); // 62nd char of encoding
            s = s.Replace('_', '/'); // 63rd char of encoding
            switch (s.Length % 4) // Pad with trailing '='s
            {
                case 0: break; // No pad chars in this case
                case 2: s += "=="; break; // Two pad chars
                case 3: s += "="; break; // One pad char
                default: throw new System.Exception("Illegal base64url string!");
            }
            return Convert.FromBase64String(s); // Standard base64 decoder
        }
}

Related Tutorials