Base64 Encode Binary Data - CSharp File IO

CSharp examples for File IO:MemoryStream

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Description

Base64 Encode Binary Data

Demo Code

using System;/*from w  w w  .j a  va  2s  . com*/
using System.IO;
using System.Text;
class MainClass
{
   public static byte[] DecimalToByteArray (decimal src)
   {
      // Create a MemoryStream as a buffer to hold the binary data.
      using (MemoryStream stream = new MemoryStream())
      {
         // Create a BinaryWriter to write binary data the stream.
         using (BinaryWriter writer = new BinaryWriter(stream))
         {
            // Write the decimal to the BinaryWriter/MemoryStream.
            writer.Write(src);
            // Return the byte representation of the decimal.
            return stream.ToArray();
         }
      }
   }
   public static decimal ByteArrayToDecimal (byte[] src)
   {
      using (MemoryStream stream = new MemoryStream(src))
      {
         using (BinaryReader reader = new BinaryReader(stream))
         {
            return reader.ReadDecimal();
         }
      }
   }
   public static string StringToBase64 (string src)
   {
      byte[] b = Encoding.Unicode.GetBytes(src);
      return Convert.ToBase64String(b);
   }
   public static string Base64ToString (string src)
   {
      byte[] b = Convert.FromBase64String(src);
      return Encoding.Unicode.GetString(b);
   }
   public static string DecimalToBase64 (decimal src)
   {
      byte[] b = DecimalToByteArray(src);
      return Convert.ToBase64String(b);
   }
   public static decimal Base64ToDecimal (string src)
   {
      byte[] b = Convert.FromBase64String(src);
      return ByteArrayToDecimal(b);
   }
   public static string IntToBase64 (int src)
   {
      byte[] b = BitConverter.GetBytes(src);
      return Convert.ToBase64String(b);
   }
   public static int Base64ToInt (string src)
   {
      byte[] b = Convert.FromBase64String(src);
      return BitConverter.ToInt32(b,0);
   }
   public static void Main()
   {
      byte[] data = { 0x06, 0x43, 0x5E, 0xFF, 0x34, 0xF0, 0x2D, 0x62, 0x78,
      0x22, 0x15, 0x52, 0x5A, 0xDE, 0x0C, 0x59, 0x43, 0x43, 0xBD, 0xC2,
      0xD5, 0x0F, 0x8D, 0xF5, 0xCE, 0x0C};
      char[] base64data = new char[(int)(Math.Ceiling((double)data.Length / 3) * 4)];
      Console.WriteLine("\nByte array encoding/decoding");
      Convert.ToBase64CharArray(data, 0, data.Length, base64data, 0);
      Console.WriteLine(new String(base64data));
      Console.WriteLine(BitConverter.ToString(Convert.FromBase64CharArray(base64data, 0, base64data.Length)));
      // Encode and decode a string.
      Console.WriteLine("\nString encoding/decoding");
      Console.WriteLine(StringToBase64
      ("Welcome to Visual C# Recipes from Apress"));
      Console.WriteLine(Base64ToString("ASDFGHJRTYUIFGHVBNDFGHRTJ"));
      // Encode and decode a decimal.
      Console.WriteLine("\nDecimal encoding/decoding");
      Console.WriteLine(DecimalToBase64(212312312545.561231236696m));
      Console.WriteLine(Base64ToDecimal("KDjBDFGHJKEPAATYUIOAAJAA=="));
      // Encode and decode an int.
      Console.WriteLine("\nInteger encoding/decoding");
      Console.WriteLine(IntToBase64(32123));
      Console.WriteLine(Base64ToInt("AAAzYsAAA=="));
   }
}

Result


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