条形码生成函数

     /*条形码生成函数
        *Author:    Jone
        */
        //主函数
        // str 待获取的字符串,w 单个条形码的长度,h 条形码的高度
        public string CreateCode(string str, int w, int h)
        {
            //alert(str);
            string returnStr = "字符串不能为空";
            if (w < 1)
                w = 1;
            if (h < 1)
                h = 52;
            if (!"".Equals(str))
            {
                string regstr = "^[a-zA-Z0-9+%*/$.-]{1,}$";
                Regex reg = new Regex(regstr, RegexOptions.IgnoreCase);
                str = str.ToLower();
                if (reg.IsMatch(str))
                {
                    str = "*" + str + "*";
                    string code = getCode(str);
                    int len = code.Length;
                    code = code.Replace("_", "<span x=1 style='float:left;height:" + h + "px;width:" + w + "px;background:#FFFFFF'></span>");
                    code = code.Replace("|", "<span x=2 style='float:left;height:" + h + "px;width:" + w + "px;background:#000000'></span>");
                    returnStr = "<div style='display:block;width:" + len + "px'>" + code + "</div>";
                }
                else
                {
                    returnStr = "字符串格式不对";
                }
            }

            return returnStr;

        }

        //将code转换成下面样式
        protected string getCode(string str)
        {
            str = str.Replace("0", "_|_|__||_||_|");
            str = str.Replace("1", "_||_|__|_|_||");
            str = str.Replace("2", "_|_||__|_|_||");
            str = str.Replace("3", "_||_||__|_|_|");
            str = str.Replace("4", "_|_|__||_|_||");
            str = str.Replace("5", "_||_|__||_|_|");
            str = str.Replace("7", "_|_|__|_||_||");
            str = str.Replace("6", "_|_||__||_|_|");
            str = str.Replace("8", "_||_|__|_||_|");
            str = str.Replace("9", "_|_||__|_||_|");
            str = str.Replace("a", "_||_|_|__|_||");
            str = str.Replace("b", "_|_||_|__|_||");
            str = str.Replace("c", "_||_||_|__|_|");
            str = str.Replace("d", "_|_|_||__|_||");
            str = str.Replace("e", "_||_|_||__|_|");
            str = str.Replace("f", "_|_||_||__|_|");
            str = str.Replace("g", "_|_|_|__||_||");
            str = str.Replace("h", "_||_|_|__||_|");
            str = str.Replace("i", "_|_||_|__||_|");
            str = str.Replace("j", "_|_|_||__||_|");
            str = str.Replace("k", "_||_|_|_|__||");
            str = str.Replace("l", "_|_||_|_|__||");
            str = str.Replace("m", "_||_||_|_|__|");
            str = str.Replace("n", "_|_|_||_|__||");
            str = str.Replace("o", "_||_|_||_|__|");
            str = str.Replace("p", "_|_||_||_|__|");
            str = str.Replace("r", "_||_|_|_||__|");
            str = str.Replace("q", "_|_|_|_||__||");
            str = str.Replace("s", "_|_||_|_||__|");
            str = str.Replace("t", "_|_|_||_||__|");
            str = str.Replace("u", "_||__|_|_|_||");
            str = str.Replace("v", "_|__||_|_|_||");
            str = str.Replace("w", "_||__||_|_|_|");
            str = str.Replace("x", "_|__|_||_|_||");
            str = str.Replace("y", "_||__|_||_|_|");
            str = str.Replace("z", "_|__||_||_|_|");
            str = str.Replace("-", "_|__|_|_||_||");
            str = str.Replace("*", "_|__|_||_||_|");
            str = str.Replace("/", "_|__|__|_|__|");
            str = str.Replace("%", "_|_|__|__|__|");
            str = str.Replace("+", "_|__|_|__|__|");
            str = str.Replace("$", "_|__|_|__|__|");
            str = str.Replace(".", "_||__|_|_||_|");

            return str;
        }