BarcodeLib/Symbologies/Codabar.cs

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

namespace BarcodeLib
{
    class Codabar: BarcodeCommon, IBarcode
    {
        private System.Collections.Hashtable Codabar_Code = new System.Collections.Hashtable(); //is initialized by init_Codabar()
        
        public Codabar(string input)
        {
            Raw_Data = input;
        }//Codabar

        /// <summary>
        /// Encode the raw data using the Codabar algorithm.
        /// </summary>
        private string Encode_Codabar()
        {
            if (Raw_Data.Length < 2) throw new Exception("ECODABAR-1: Data format invalid. (Invalid length)");

            //check first char to make sure its a start/stop char
            switch (Raw_Data[0].ToString().ToUpper().Trim())
            {
                case "A": break;
                case "B": break;
                case "C": break;
                case "D": break;
                default: throw new Exception("ECODABAR-2: Data format invalid. (Invalid START character)");
            }//switch

            //check the ending char to make sure its a start/stop char
            switch (Raw_Data[Raw_Data.Trim().Length - 1].ToString().ToUpper().Trim())
            {
                case "A": break;
                case "B": break;
                case "C": break;
                case "D": break;
                default: throw new Exception("ECODABAR-3: Data format invalid. (Invalid STOP character)");
            }//switch

            string result = "";

            //populate the hashtable to begin the process
            this.init_Codabar();

            foreach (char c in Raw_Data)
            {
                result += Codabar_Code[c].ToString();
                result += "0"; //inter-character space
            }//foreach

            //remove the extra 0 at the end of the result
            result = result.Remove(result.Length - 1);

            //clears the hashtable so it no longer takes up memory
            this.Codabar_Code.Clear();

            return result;