RM.Common/DotNetCode/ConvertHelper.cs

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using System;
using System.Text;

namespace RM.Common.DotNetCode
{
    public sealed class ConvertHelper
    {
        public static string ConvertBase(string value, int from, int to)
        {
            if (!ConvertHelper.isBaseNumber(from))
            {
                throw new ArgumentException("参数from只能是2,8,10,16四个值。");
            }
            if (!ConvertHelper.isBaseNumber(to))
            {
                throw new ArgumentException("参数to只能是2,8,10,16四个值。");
            }
            int intValue = Convert.ToInt32(value, from);
            string result = Convert.ToString(intValue, to);
            if (to == 2)
            {
                switch (result.Length)
                {
                    case 3:
                        result = "00000" + result;
                        break;

                    case 4:
                        result = "0000" + result;
                        break;

                    case 5:
                        result = "000" + result;
                        break;

                    case 6:
                        result = "00" + result;
                        break;

                    case 7:
                        result = "0" + result;
                        break;
                }
            }
            return result;
        }

        private static bool isBaseNumber(int baseNumber)
        {
            return baseNumber == 2 || baseNumber == 8 || baseNumber == 10 || baseNumber == 16;
        }

        public static byte[] StringToBytes(string text)
        {
            return Encoding.Default.GetBytes(text);
        }

        public static byte[] StringToBytes(string text, Encoding encoding)
        {
            return encoding.GetBytes(text);