Converts from base: 0 - 62 - CSharp System

CSharp examples for System:String Convert

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Description

Converts from base: 0 - 62

Demo Code

// Licensed under the same terms of ServiceStack: new BSD license.
using System.Text;
using System.Linq;
using System.Collections.Generic;
using System;//from  ww w  .j av a  2 s .co  m

public class Main{
        /// <summary>
		/// Converts from base: 0 - 62
		/// </summary>
		/// <param name="source">The source.</param>
		/// <param name="from">From.</param>
		/// <param name="to">To.</param>
		/// <returns></returns>
		public static string BaseConvert(this string source, int from, int to)
		{
			const string chars = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
			var result = "";
			var length = source.Length;
			var number = new int[length];

			for (var i = 0; i < length; i++)
			{
				number[i] = chars.IndexOf(source[i]);
			}

			int newlen;

			do
			{
				var divide = 0;
				newlen = 0;

				for (var i = 0; i < length; i++)
				{
					divide = divide * from + number[i];

					if (divide >= to)
					{
						number[newlen++] = (int)(divide / to);
						divide = divide % to;
					}
					else if (newlen > 0)
					{
						number[newlen++] = 0;
					}
				}

				length = newlen;
				result = chars[divide] + result;
			}
			while (newlen != 0);

			return result;
		}
}

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