条码生成实例

1.下面是代码

string[] Code39 =
        {
                 /* 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"
             };

        /// <summary>
        /// 生成条码 Bitmap,自定义条码高度,自定义文字对齐样式
        /// </summary>
        /// <param name="sourceCode"></param>
        /// <param name="barCodeHeight"></param>
        /// <param name="sf"></param>
        /// <returns></returns>
        public Bitmap GetCode39(string sourceCode, int barCodeHeight, StringFormat sf,string titleName="")
        {
            var BarCodeText = sourceCode.ToUpper();
            int leftMargin = 0;
            int topMargin = 0;
            int thickLength = 2;
            int narrowLength = 1;
            int intSourceLength = sourceCode.Length;
            string strEncode = "010010100"; //添加起始码“ *”.
            var font = new System.Drawing.Font("Segoe UI", 5);
            string AlphaBet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*";

            sourceCode = sourceCode.ToUpper();
            Bitmap objBitmap = new Bitmap(((thickLength * 3 + narrowLength * 7) * (intSourceLength + 2)) + (leftMargin * 2), barCodeHeight + (topMargin * 2));

            Graphics objGraphics = Graphics.FromImage(objBitmap);

            //获取条码最终编号
            for (int i = 0; i < intSourceLength; i++)
            {
                //非法字符校验
                if (AlphaBet.IndexOf(sourceCode[i]) == -1 || sourceCode[i] == '*')
                {
                    //异常返回
                    objGraphics.FillRectangle(Brushes.White, 0, topMargin, objBitmap.Width, objBitmap.Height);
                    objGraphics.DrawString("Invalid Bar Code", SystemFonts.DefaultFont, Brushes.Red, leftMargin, topMargin);
                    return objBitmap;
                }
                //编码
                strEncode = string.Format("{0}0{1}", strEncode,Code39[AlphaBet.IndexOf(sourceCode[i])]);
            }
            strEncode = string.Format("{0}0010010100", strEncode); //添加结束码“*”

            //绘制条码
            int intEncodeLength = strEncode.Length;
            int intBarWidth;
            for (int i = 0; i < intEncodeLength; i++) //绘制 Code39 barcode
            {
                intBarWidth = strEncode[i] == '1' ? thickLength : narrowLength;
                objGraphics.FillRectangle(i % 2 == 0 ? Brushes.Black : Brushes.White, leftMargin, topMargin, intBarWidth, barCodeHeight);
                leftMargin += intBarWidth;
            }
          
            //绘制信息明码--title
            Font barCodeTextFont = new Font("黑体", 10F);
            var titlerect = new RectangleF(0, 0, objBitmap.Width, 20);
            objGraphics.FillRectangle(Brushes.White, titlerect);
            //文本对齐
            objGraphics.DrawString(titleName, barCodeTextFont, Brushes.Black, titlerect);
            //绘制明码      
            //Font barCodeTextFont = new Font("黑体", 10F);
            RectangleF rect = new RectangleF(0, barCodeHeight - 20, objBitmap.Width, 20);
            objGraphics.FillRectangle(Brushes.White, rect);
            //文本对齐
            objGraphics.DrawString(BarCodeText, barCodeTextFont, Brushes.Black, rect, sf);
            
            return objBitmap;
        }