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copied!<p>Here's some code that'll convert an integer to an arbitrary base up to 36, and convert a string representation of a base x value to an integer (given the base):</p> <pre><code>class Program { static void Main(string[] args) { int b10 = 123; int targetBase = 5; string converted = ConvertToBase(b10, targetBase); int convertedBack = ConvertFromBase(converted, targetBase); string base3 = "212210"; string base7 = ConvertFromBaseToBase(base3, 3, 7); Console.WriteLine(converted); Console.WriteLine(convertedBack); Console.WriteLine(base7); Console.ReadLine(); } private const string chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; private static string ConvertToBase(int b10, int targetBase) { if (targetBase < 2) throw new ArgumentException("Target base must be greater than 2.", "targetBase"); if (targetBase > 36) throw new ArgumentException("Target base must be less than 36.", "targetBase"); if (targetBase == 10) return b10.ToString(); StringBuilder result = new StringBuilder(); while (b10 >= targetBase) { int mod = b10 % targetBase; result.Append(chars[mod]); b10 = b10 / targetBase; } result.Append(chars[b10]); return Reverse(result.ToString()); } private static int ConvertFromBase(string bx, int fromBase) { if (fromBase < 2) throw new ArgumentException("Base must be greater than 2.", "fromBase"); if (fromBase > 36) throw new ArgumentException("Base must be less than 36.", "fromBase"); if (fromBase == 10) return int.Parse(bx); bx = Reverse(bx); int acc = 0; for (int i = 0; i < bx.Length; i++) { int charValue = chars.IndexOf(bx[i]); acc += (int)Math.Pow(fromBase, i) * charValue; } return acc; } public static string ConvertFromBaseToBase(string bx, int fromBase, int toBase) { int b10 = ConvertFromBase(bx, fromBase); return ConvertToBase(b10, toBase); } public static string Reverse(string s) { char[] charArray = new char[s.Length]; int len = s.Length - 1; for (int i = 0; i <= len; i++) charArray[i] = s[len - i]; return new string(charArray); } } </code></pre> <p>If you're unconcerned with displaying these values, you can use extended characters in your chars set - if you stick to plain ascii, you can theoretically have base256 values. Going beyond that I would recommend not using chars, but instead using some other uniquely-identifiable value - though I don't much see the value.</p>

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