Base64 from http://en.wikibooks.org/wiki/Algorithm_Implementation/Miscellaneous/Base64#Java : Base64 « Development Class « C# / C Sharp

1. C# / C Sharp
2. Development Class
3. Base64

Base64 from http://en.wikibooks.org/wiki/Algorithm_Implementation/Miscellaneous/Base64#Java

 
using System;
using System.Collections;

public static class HTTPUtility
{


    #region Base64

    // Adapted from example at: http://en.wikibooks.org/wiki/Algorithm_Implementation/Miscellaneous/Base64#Java
    public static string ConvertToBase64String(byte[] inArray)
    {
        // Base 64 character set
        const string base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

        // Result and padding strings
        string r = string.Empty;
        string p = string.Empty;

        // Zero pad the array if necessary
        int c = inArray.Length % 3;
        if (c > 0)
        {
            int addedChars = 3 - c;
            p = new string('=', addedChars);
            byte[] newArray = new byte[inArray.Length + addedChars];
            inArray.CopyTo(newArray, 0);
            inArray = newArray;
        }

        // Convert the input array
        for (int i = 0; i < inArray.Length; i += 3)
        {
            // Add a newline character if necessary
            if (i > 0 && (i / 3 * 4) % 76 == 0)
                r += "\r\n";

            // Three bytes become one 24-bit number
            int n = (inArray[i] << 16) + (inArray[i + 1] << 8) + (inArray[i + 2]);

            // 24-bit number gets split into four 6-bit numbers
            int n1 = (n >> 18) & 63;
            int n2 = (n >> 12) & 63;
            int n3 = (n >> 6) & 63;
            int n4 = n & 63;

            // Use the four 6-bit numbers as indices for the base64 character list
            r = string.Concat(r, base64Chars[n1], base64Chars[n2], base64Chars[n3], base64Chars[n4]);
        }

        return r.Substring(0, r.Length - p.Length) + p;
    }

    #endregion
}

   
  

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