純 C# 產生Code39 BarCode 圖片

參考引用來源:純 C# 產生Code39 BarCode 圖片
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using System.Drawing;
using System.Drawing.Imaging;
private Bitmap GetCode39(string strSource)
{
  int x = 5; //左邊界
  int y = 0; //上邊界
  int WidLength = 2; //粗BarCode長度
  int NarrowLength = 1; //細BarCode長度
  int BarCodeHeight = 24; //BarCode高度
  int intSourceLength = strSource.Length;
  string strEncode = "010010100"; //編碼字串 初值為 起始符號 *

  string AlphaBet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*"; //Code39的字母

  string[] Code39 = //Code39的各字母對應碼
  {
       /* 0 */ "000110100",
       /* 1 */ "100100001",
       /* 2 */ "001100001",
       /* 3 */ "101100000",
       /* 4 */ "000110001",
       /* 5 */ "100110000",
       /* 6 */ "001110000",
       /* 7 */ "000100101",
       /* 8 */ "100100100",
       /* 9 */ "001100100",
       /* A */ "100001001",
       /* B */ "001001001",
       /* C */ "101001000",
       /* D */ "000011001",
       /* E */ "100011000",
       /* F */ "001011000",
       /* G */ "000001101",
       /* H */ "100001100",
       /* I */ "001001100",
       /* J */ "000011100",
       /* K */ "100000011",
       /* L */ "001000011",
       /* M */ "101000010",
       /* N */ "000010011",
       /* O */ "100010010",
       /* P */ "001010010",
       /* Q */ "000000111",
       /* R */ "100000110",
       /* S */ "001000110",
       /* T */ "000010110",
       /* U */ "110000001",
       /* V */ "011000001",
       /* W */ "111000000",
       /* X */ "010010001",
       /* Y */ "110010000",
       /* Z */ "011010000",
       /* - */ "010000101",
       /* . */ "110000100",
       /*' '*/ "011000100",
       /* $ */ "010101000",
       /* / */ "010100010",
       /* + */ "010001010",
       /* % */ "000101010",
       /* * */ "010010100"
  };


  strSource = strSource.ToUpper();

  //實作圖片
  Bitmap objBitmap = new Bitmap(
    ((WidLength * 3 + NarrowLength * 7) * (intSourceLength + 2)) + (x * 2),
    BarCodeHeight + (y * 2));

  Graphics objGraphics = Graphics.FromImage(objBitmap); //宣告GDI+繪圖介面

  //填上底色
  objGraphics.FillRectangle(Brushes.White, 0, 0, objBitmap.Width, objBitmap.Height);

  for (int i = 0; i < intSourceLength; i++)
  {
    if (AlphaBet.IndexOf(strSource[i]) == -1 || strSource[i] == '*') //檢查是否有非法字元
    {
      objGraphics.DrawString("含有非法字元", SystemFonts.DefaultFont, Brushes.Red, x, y);
      return objBitmap;
    }
    //查表編碼
    strEncode = string.Format("{0}0{1}", strEncode, Code39[AlphaBet.IndexOf(strSource[i])]);
  }

  strEncode = string.Format("{0}0010010100", strEncode); //補上結束符號 *

  int intEncodeLength = strEncode.Length; //編碼後長度
  int intBarWidth;

  for (int i = 0; i < intEncodeLength; i++) //依碼畫出Code39 BarCode
  {
    intBarWidth = strEncode[i] == '1' ? WidLength : NarrowLength;
    objGraphics.FillRectangle(i % 2 == 0 ? Brushes.Black : Brushes.White,
      x, y, intBarWidth , BarCodeHeight);
    x += intBarWidth;
  }
  return objBitmap;
}