ISO8583组包、解包

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace POS.Provider
{
    public class ISO8583
    {
        readonly int[] VLen = new int[130];
        readonly int[] FLen = new int[130];
        public ISO8583()
        {
            #region VLEN
            VLen[2] = 2;
            VLen[32] = 2;
            VLen[33] = 2;
            VLen[34] = 2;
            VLen[35] = 2;
            VLen[36] = 3;
            VLen[44] = 2;
            VLen[45] = 2;
            VLen[46] = 3;
            VLen[47] = 3;
            VLen[48] = 3;
            VLen[54] = 3;
            VLen[55] = 3;
            VLen[56] = 3;
            VLen[57] = 3;
            VLen[58] = 3;
            VLen[59] = 3;
            VLen[60] = 1;
            VLen[61] = 3;
            VLen[62] = 3;
            VLen[63] = 3;
            VLen[72] = 3;
            VLen[99] = 2;
            VLen[100] = 2;
            VLen[102] = 2;
            VLen[103] = 2;
            VLen[104] = 3;
            VLen[105] = 3;
            VLen[106] = 3;
            VLen[107] = 3;
            VLen[108] = 3;
            VLen[109] = 3;
            VLen[110] = 3;
            VLen[111] = 3;
            VLen[112] = 3;
            VLen[113] = 2;
            VLen[114] = 3;
            VLen[115] = 3;
            VLen[116] = 3;
            VLen[117] = 3;
            VLen[118] = 3;
            VLen[119] = 3;
            VLen[120] = 3;
            VLen[121] = 3;
            VLen[122] = 3;
            VLen[123] = 3;
            VLen[124] = 3;
            VLen[125] = 2;
            VLen[126] = 1;
            VLen[127] = 3;
            #endregion
            #region FLEN
            FLen[0] = 16;
            FLen[1] = 16;
            FLen[3] = 6;
            FLen[4] = 12;
            FLen[5] = 12;
            FLen[6] = 12;
            FLen[7] = 10;
            FLen[8] = 8;
            FLen[9] = 8;
            FLen[10] = 8;
            FLen[11] = 6;
            FLen[12] = 6;
            FLen[13] = 4;
            FLen[14] = 4;
            FLen[15] = 4;
            FLen[16] = 4;
            FLen[17] = 4;
            FLen[18] = 4;
            FLen[19] = 3;
            FLen[20] = 3;
            FLen[21] = 3;
            FLen[22] = 3;
            FLen[23] = 3;
            FLen[24] = 3;
            FLen[25] = 2;
            FLen[26] = 2;
            FLen[27] = 1;
            FLen[28] = 8;
            FLen[29] = 8;
            FLen[30] = 8;
            FLen[31] = 8;
            FLen[37] = -12;
            FLen[38] = -6;
            FLen[39] = -2;
            FLen[40] = -3;
            FLen[41] = -8;
            FLen[42] = -15;
            FLen[43] = -40;
            FLen[49] = -3;
            FLen[50] = -3;
            FLen[51] = -3;
            FLen[52] = -16;
            FLen[53] = 18;
            FLen[64] = -4;
            FLen[65] = -16;
            FLen[66] = 1;
            FLen[67] = 2;
            FLen[68] = 3;
            FLen[69] = 3;
            FLen[70] = 3;
            FLen[71] = 4;
            FLen[73] = 6;
            FLen[74] = 10;
            FLen[75] = 10;
            FLen[76] = 10;
            FLen[77] = 10;
            FLen[78] = 10;
            FLen[79] = 10;
            FLen[80] = 10;
            FLen[81] = 10;
            FLen[82] = 12;
            FLen[83] = 12;
            FLen[84] = 12;
            FLen[85] = 12;
            FLen[86] = 15;
            FLen[87] = 15;
            FLen[88] = 15;
            FLen[89] = 15;
            FLen[90] = 42;
            FLen[91] = -1;
            FLen[92] = 2;
            FLen[93] = 5;
            FLen[94] = -7;
            FLen[95] = -42;
            FLen[96] = -8;
            FLen[97] = 16;
            FLen[98] = -25;
            FLen[101] = -17;
            FLen[128] = -16;
            #endregion
        }
        public string ToPackage(string[] v, string _ISO)
        {
            try
            {
                v = v.ToDomain();
                for (int i = 0; i <= 128; i++)
                {
                    if (v[i] == null || v[i] == "")
                        continue;
                    _ISO += VLen[i] < 1 ?
                                FLen[i] < 0 ?
                                    v[i].PadRight(Math.Abs(FLen[i]), ‘ ‘).Substring(0, Math.Abs(FLen[i])) :
                                    v[i].PadLeft(FLen[i], ‘0‘).Substring(v[i].PadLeft(FLen[i], ‘0‘).Length - Math.Abs(FLen[i]), Math.Abs(FLen[i])) :
                                (v[i].Length.ToString().PadLeft(VLen[i], ‘0‘) + v[i]);
                }
                return _ISO;
            }
            catch (Exception ex)
            {
                throw new Exception("打包失败:" + ex);
            }
        }
        public string[] UnPackage(string s)
        {
            try
            {
                var v = new string[130];
                var _OneBlock = "";
                var _TwoBlock = "";
                var x = 4;
                for (var i = 0; i <= 128; i++)
                {
                    if (i == 0)
                    {
                        v[129] = s.Skip(i).Take(x).ToStr();
                        v[i] = s.Skip(x).Take(FLen[i]).ToStr();
                        _OneBlock = v[i].ToBinary();
                        x += FLen[i];
                        continue;
                    }
                    if (i == 1)
                    {
                        if (_OneBlock.Substring(i - 1, 1) == "1")
                        {
                            v[i] = s.Skip(x).Take(FLen[i]).ToStr();
                            _TwoBlock = v[i].ToBinary();
                            x += FLen[i];
                        }
                        continue;
                    }
                    if (i >= 65)
                        if (_TwoBlock == "" || _TwoBlock == "0000000000000000000000000000000000000000000000000000000000000000")
                            break;
                        else
                        {
                            if (VLen[i] > 0)
                            {
                                if (_TwoBlock.Substring(i - 64 - 1, 1) == "1")
                                {
                                    var w = Convert.ToInt16(s.Skip(x).Take(VLen[i]).ToStr());
                                    v[i] = s.Skip(x + VLen[i]).Take(w).ToStr();
                                    x += (w + VLen[i]);
                                }
                            }
                            else
                            {
                                if (_TwoBlock.Substring(i - 64 - 1, 1) == "1")
                                {
                                    v[i] = s.Skip(x).Take(FLen[i].ToAbs()).ToStr();
                                    x += FLen[i].ToAbs();
                                }
                            }
                        }
                    else
                    {
                        if (VLen[i] > 0)
                        {
                            if (_OneBlock.Substring(i - 1, 1) == "1")
                            {
                                var w = Convert.ToInt16(s.Skip(x).Take(VLen[i]).ToStr());
                                v[i] = s.Skip(x + VLen[i]).Take(w).ToStr();
                                x += (w + VLen[i]);
                            }
                        }
                        else
                        {
                            if (_OneBlock.Substring(i - 1, 1) == "1")
                            {
                                v[i] = s.Skip(x).Take(FLen[i].ToAbs()).ToStr();
                                x += FLen[i].ToAbs();
                            }
                        }
                    }
                }
                return v;
            }
            catch (Exception ex)
            {
                throw new Exception("解包失败:" + ex);
            }
        }
    }
    public class ISO8583Model
    {

    }
    public static class ISO8583ToolBox
    {
        public static string[] ToDomain(this string[] v)
        {
            var _OneBlock = "";
            for (var i = 2; i <= 64; i++)
                _OneBlock += (v[i] != null && v[i] != "") ? "1" : "0";
            var _TwoBlock = "";
            for (var i = 65; i <= 128; i++)
                _TwoBlock += (v[i] != null && v[i] != "") ? "1" : "0";
            _OneBlock = _TwoBlock == "0000000000000000000000000000000000000000000000000000000000000000" ? "0" + _OneBlock : "1" + _OneBlock;
            v[0] = _OneBlock.ToHex().PadLeft(16, ‘0‘);
            v[1] = _TwoBlock.ToHex().PadLeft(16, ‘0‘) == "0000000000000000" ? null : _TwoBlock.ToHex().PadLeft(16, ‘0‘);
            return v;
        }
        public static string ToBinary(this string x)
        {
            var s = "";
            for (int i = 0; i <= 15; i++)
                s += x.Substring(i, 1).ToBin();
            return s;
        }
        public static string ToBin(this string s)
        {
            return s == "0" ? "0000" :
                   s == "1" ? "0001" :
                   s == "2" ? "0010" :
                   s == "3" ? "0011" :
                   s == "4" ? "0100" :
                   s == "5" ? "0101" :
                   s == "6" ? "0110" :
                   s == "7" ? "0111" :
                   s == "8" ? "1000" :
                   s == "9" ? "1001" :
                   s == "A" ? "1010" :
                   s == "B" ? "1011" :
                   s == "C" ? "1100" :
                   s == "D" ? "1101" :
                   s == "E" ? "1110" :
                   s == "F" ? "1111" : "";
        }
        public static string ToHex(this string s)
        {
            return String.Format("{0:X1}", Convert.ToInt64(s, 2));
        }
        public static string ToStr(this IEnumerable<Char> s)
        {
            return String.Join("", s);
        }
        public static int ToAbs(this int i)
        {
            return Math.Abs(i);
        }
    }
}