C#如何打印条形码EAN13码

假设将EAN的内容从右到左的顺序编号:N13、N12、N11、N10、N9、N8、N7、N6、N5、N4、N3、N2、N1，其中N1是准备要求的校验位：
1、C1=（N2+N4+N6+N8+N10+N12）*3；
2、C2=N3+N5+N7+N9+N11+N13；
3、将C1与C2相加，取其个位数，设为C3；4、校验位N1=10-C3

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;

namespace BarCodeEAN13
{
/// <summary>
/// Barcode control.
/// </summary>
public class wctrl_BarCode
{

   private static string getENA13Code(string Numbers12bit)
   {
    int c1 = 0;
    int c2 = 0;

    for (int i=0; i<11; i= i+2)
    {
     c1 += int.Parse(Numbers12bit[i].ToString());
     c2 += int.Parse(Numbers12bit[i+1].ToString());
    }

    int c3 = c1 + c2 *3;

    c3 = c3 - c3/10 *10;

    if (c3 == 0)
    {
     return Numbers12bit + 0;
    }
    else
    {
     int N = 10 - c3;

     return Numbers12bit + N;
    }
   }

   /// <summary>
   /// Paint EAN13 barcode to specified graphics into specified draw rectangle.
   /// </summary>
   /// <param name="barCode">BarCode value.</param>
   /// <param name="g">Graphics where to draw.</param>
   /// <param name="drawBounds">Draw bounds.</param>
   public static void Paint_EAN13(string Numbers12bit,Graphics g,Rectangle drawBounds)
   {
    string barCode = getENA13Code(Numbers12bit);

    char[] symbols = barCode.ToCharArray();

    //--- Validate barCode -------------------------------------------------------------------//
    if(barCode.Length != 13){    
     return;
    }
    foreach(char c in symbols){
     if(!Char.IsDigit(c)){
      return;
     }
    }

    //--- Check barcode checksum ------------------------//
    int checkSum = Convert.ToInt32(symbols[12].ToString());
    int calcSum = 0;
    bool one_three = true;
    for(int i=0;i<12;i++){
     if(one_three){
      calcSum += (Convert.ToInt32(symbols[i].ToString()) * 1);
      one_three = false;
     }
     else{
      calcSum += (Convert.ToInt32(symbols[i].ToString()) * 3);
      one_three = true;
     }    
    }
   
    char[] calcSumChar = calcSum.ToString().ToCharArray();
    if(checkSum !=0 && checkSum != (10 - Convert.ToInt32(calcSumChar[calcSumChar.Length - 1].ToString()))){
     return;
      }   
    //--------------------------------------------------//
    //---------------------------------------------------------------------------------------//

    Font font = new Font("Microsoft Sans Serif",8);
   
    // Fill backround with white color
//    g.Clear(Color.White);

    int lineWidth = 1;
    int x = drawBounds.X;

    // Paint human readable 1 system symbol code
    g.DrawString(symbols[0].ToString(),font,new SolidBrush(Color.Black),x,drawBounds.Y + drawBounds.Height - 16);
    x += 10;

    // Paint left 'guard bars', always same '101'
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;

    // First number of barcode specifies how to encode each character in the left-hand
    // side of the barcode should be encoded.
    bool[] leftSideParity = new bool[6];
    switch(symbols[0])
    {
     case '0':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = true; // Odd
      leftSideParity[2] = true; // Odd
      leftSideParity[3] = true; // Odd
      leftSideParity[4] = true; // Odd
      leftSideParity[5] = true; // Odd
      break;
     case '1':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = true; // Odd
      leftSideParity[2] = false; // Even
      leftSideParity[3] = true; // Odd
      leftSideParity[4] = false; // Even
      leftSideParity[5] = false; // Even
      break;
     case '2':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = true; // Odd
      leftSideParity[2] = false; // Even
      leftSideParity[3] = false; // Even
      leftSideParity[4] = true; // Odd
      leftSideParity[5] = false; // Even
      break;
     case '3':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = true; // Odd
      leftSideParity[2] = false; // Even
      leftSideParity[3] = false; // Even
      leftSideParity[4] = false; // Even
      leftSideParity[5] = true; // Odd
      break;
     case '4':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = true; // Odd
      leftSideParity[3] = true; // Odd
      leftSideParity[4] = false; // Even
      leftSideParity[5] = false; // Even
      break;
     case '5':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = false; // Even
      leftSideParity[3] = true; // Odd
      leftSideParity[4] = true; // Odd
      leftSideParity[5] = false; // Even
      break;
     case '6':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = false; // Even
      leftSideParity[3] = false; // Even
      leftSideParity[4] = true; // Odd
      leftSideParity[5] = true; // Odd
      break;
     case '7':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = true; // Odd
      leftSideParity[3] = false; // Even
      leftSideParity[4] = true; // Odd
      leftSideParity[5] = false; // Even
      break;
     case '8':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = true; // Odd
      leftSideParity[3] = false; // Even
      leftSideParity[4] = false; // Even
      leftSideParity[5] = true; // Odd
      break;
     case '9':
      leftSideParity[0] = true; // Odd
      leftSideParity[1] = false; // Even
      leftSideParity[2] = false; // Even
      leftSideParity[3] = true; // Odd
      leftSideParity[4] = false; // Even
      leftSideParity[5] = true; // Odd
      break;
    }

    // second number system digit + 5 symbol manufacter code
    string lines = "";
    for(int i=0;i<6;i++){
     bool oddParity = leftSideParity[i];
     if(oddParity){
      switch(symbols[i + 1])
      {
       case '0':
        lines += "0001101";
        break;
       case '1':
        lines += "0011001";
        break;
       case '2':
        lines += "0010011";
        break;
       case '3':
        lines += "0111101";
        break;
       case '4':
        lines += "0100011";
        break;
       case '5':
        lines += "0110001";
        break;
       case '6':
        lines += "0101111";
        break;
       case '7':
        lines += "0111011";
        break;
       case '8':
        lines += "0110111";
        break;
       case '9':
        lines += "0001011";
        break;
      }
     }
     // Even parity
     else{
      switch(symbols[i + 1])
      {
       case '0':
        lines += "0100111";
        break;
       case '1':
        lines += "0110011";
        break;
       case '2':
        lines += "0011011";
        break;
       case '3':
        lines += "0100001";
        break;
       case '4':
        lines += "0011101";
        break;
       case '5':
        lines += "0111001";
        break;
       case '6':
        lines += "0000101";
        break;
       case '7':
        lines += "0010001";
        break;
       case '8':
        lines += "0001001";
        break;
       case '9':
        lines += "0010111";
        break;
      }
     }
    }

    // Paint human readable left-side 6 symbol code
    g.DrawString(barCode.Substring(1,6),font,new SolidBrush(Color.Black),x,drawBounds.Y + drawBounds.Height - 12);

    char[] xxx = lines.ToCharArray();
    for(int i=0;i<xxx.Length;i++){
     if(xxx[i] == '1'){
      g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height - 12);
     }
     else{
      g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height - 12);
     }
     x += lineWidth;
    }
   
    // Paint center 'guard bars', always same '01010'
    g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;

    // 5 symbol product code + 1 symbol parity
    lines = "";
    for(int i=7;i<13;i++){
     switch(symbols[i])
     {
      case '0':
       lines += "1110010";
       break;
      case '1':
       lines += "1100110";
       break;
      case '2':
       lines += "1101100";
       break;
      case '3':
       lines += "1000010";
       break;
      case '4':
       lines += "1011100";
       break;
      case '5':
       lines += "1001110";
       break;
      case '6':
       lines += "1010000";
       break;
      case '7':
       lines += "1000100";
       break;
      case '8':
       lines += "1001000";
       break;
      case '9':
       lines += "1110100";
       break;
     }
    }

    // Paint human readable left-side 6 symbol code
    g.DrawString(barCode.Substring(7,6),font,new SolidBrush(Color.Black),x,drawBounds.Y + drawBounds.Height - 12);

    xxx = lines.ToCharArray();
    for(int i=0;i<xxx.Length;i++){
     if(xxx[i] == '1'){
      g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height - 12);
     }
     else{
      g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height - 12);
     }
     x += lineWidth;
    }
   
    // Paint right 'guard bars', always same '101'
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.White,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
    x += lineWidth;
    g.DrawLine(new Pen(Color.Black,lineWidth),x,drawBounds.Y,x,drawBounds.Y + drawBounds.Height);
   }

}
}