BarcodeLib/Symbologies/EAN13.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
namespace BarcodeLib
{
    class EAN13 : BarcodeCommon, IBarcode
    {
        private string[] EAN_CodeA = { "0001101", "0011001", "0010011", "0111101", "0100011", "0110001", "0101111", "0111011", "0110111", "0001011" };
        private string[] EAN_CodeB = { "0100111", "0110011", "0011011", "0100001", "0011101", "0111001", "0000101", "0010001", "0001001", "0010111" };
        private string[] EAN_CodeC = { "1110010", "1100110", "1101100", "1000010", "1011100", "1001110", "1010000", "1000100", "1001000", "1110100" };
        private string[] EAN_Pattern = { "aaaaaa", "aababb", "aabbab", "aabbba", "abaabb", "abbaab", "abbbaa", "ababab", "ababba", "abbaba" };
        private Hashtable CountryCodes = new Hashtable(); //is initialized by init_CountryCodes()
        private string _Country_Assigning_Manufacturer_Code = "N/A";

        public EAN13(string input)
        {
            Raw_Data = input;

            CheckDigit();
        }
        /// <summary>
        /// Encode the raw data using the EAN-13 algorithm. (Can include the checksum already.  If it doesnt exist in the data then it will calculate it for you.  Accepted data lengths are 12 + 1 checksum or just the 12 data digits)
        /// </summary>
        private string Encode_EAN13()
        {
            //check length of input
            if (Raw_Data.Length < 12 || Raw_Data.Length > 13)
                throw new Exception("EEAN13-1: Data length invalid.");

            if (!BarcodeLib.Barcode.CheckNumericOnly(Raw_Data))
                throw new Exception("EEAN13-2: Numeric Data Only");

            string patterncode = EAN_Pattern[Int32.Parse(Raw_Data[0].ToString())];
            string result = "101";

            //first
            //result += EAN_CodeA[Int32.Parse(RawData[0].ToString())];

            //second
            int pos = 0;
            while (pos < 6)
            {
                if (patterncode[pos] == 'a')
                    result += EAN_CodeA[Int32.Parse(Raw_Data[pos + 1].ToString())];
                if (patterncode[pos] == 'b')
                    result += EAN_CodeB[Int32.Parse(Raw_Data[pos + 1].ToString())];
                pos++;
            }//while


            //add divider bars
            result += "01010";

            //get the third
            pos = 1;
            while (pos <= 5)
            {
                result += EAN_CodeC[Int32.Parse(Raw_Data[(pos++) + 6].ToString())];
            }//while