public partial class ReceivablesFormView : System.Web.UI.Page    {        protected void Page_Load(object sender, EventArgs e)        {            string code = Get("6901028045575", 2, 60);            this.barcode.InnerHtml = code;        }        /// <summary>        /// 获取 EAN-13 条形码（HTML 版）        /// </summary>        /// <param name="s">欲编码的字符串</param>        /// <param name="width">单个条形宽（px）</param>        /// <param name="height">条形高（px）</param>        /// <returns></returns>        public static string Get(string s, int width, int height)        {            int checkcode_input = -1;//输入的校验码            if (!Regex.IsMatch(s, @"^\d{12}$"))            {                if (s.Length != 13)                {                    return "字符串长度不正确！";                }                else if (!Regex.IsMatch(s, @"^\d{13}$"))                {                    return "存在不允许的字符！";                }                else                {                    checkcode_input = int.Parse(s[12].ToString());                    s = s.Substring(0, 12);                }            }            int sum_even = 0;//偶数位之和            int sum_odd = 0;//奇数位之和            for (int i = 0; i < 12; i++)            {                if (i % 2 == 0)                {                    sum_odd += int.Parse(s[i].ToString());                }                else                {                    sum_even += int.Parse(s[i].ToString());                }            }            int checkcode = (10 - (sum_even * 3 + sum_odd) % 10) % 10;//校验码            if (checkcode_input > 0 && checkcode_input != checkcode)            {                return "输入的校验码错误！";            }            s += checkcode;//变成13位            // 000000000101左侧42个01010右侧35个校验7个101000000000            // 6        101左侧6位 01010右侧5位 校验1位101000000000            string result_bin = "";//二进制串            result_bin += "000000000101";            string type = ean13type(s[0]);            for (int i = 1; i < 7; i++)            {                result_bin += ean13(s[i], type[i - 1]);            }            result_bin += "01010";            for (int i = 7; i < 13; i++)            {                result_bin += ean13(s[i], ‘C‘);            }            result_bin += "101000000000";            string result_html = "";//HTML代码            string color = "";//颜色            int height_bottom = width * 5;            foreach (char c in result_bin)            {                color = c == ‘0‘ ? "#FFFFFF" : "#000000";                result_html += "<div style=\"width:" + width + "px;height:" + height + "px;float:left;background:" + color + ";\"></div>";            }            result_html += "<div style=\"clear:both\"></div>";            result_html += "<div style=\"float:left;color:#000000;width:" + (width * 9) + "px;text-align:center;\">" + s[0] + "</div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#FFFFFF;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            for (int i = 1; i < 7; i++)            {                result_html += "<div style=\"float:left;width:" + (width * 7) + "px;color:#000000;text-align:center;\">" + s[i] + "</div>";            }            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#FFFFFF;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#FFFFFF;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#FFFFFF;\"></div>";            for (int i = 7; i < 13; i++)            {                result_html += "<div style=\"float:left;width:" + (width * 7) + "px;color:#000000;text-align:center;\">" + s[i] + "</div>";            }            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#FFFFFF;\"></div>";            result_html += "<div style=\"float:left;width:" + width + "px;height:" + height_bottom + "px;background:#000000;\"></div>";            result_html += "<div style=\"float:left;color:#000000;width:" + (width * 9) + "px;\"></div>";            result_html += "<div style=\"clear:both\"></div>";            return "<div style=\"background:#FFFFFF;padding:0px;font-size:" + (width * 10) + "px;font-family:‘楷体‘;\">" + result_html + "</div>";        }        private static string ean13(char c, char type)        {            switch (type)            {                case ‘A‘:                    {                        switch (c)                        {                            case ‘0‘: return "0001101";                            case ‘1‘: return "0011001";                            case ‘2‘: return "0010011";                            case ‘3‘: return "0111101";//011101                            case ‘4‘: return "0100011";                            case ‘5‘: return "0110001";                            case ‘6‘: return "0101111";                            case ‘7‘: return "0111011";                            case ‘8‘: return "0110111";                            case ‘9‘: return "0001011";                            default: return "Error!";                        }                    }                case ‘B‘:                    {                        switch (c)                        {                            case ‘0‘: return "0100111";                            case ‘1‘: return "0110011";                            case ‘2‘: return "0011011";                            case ‘3‘: return "0100001";                            case ‘4‘: return "0011101";                            case ‘5‘: return "0111001";                            case ‘6‘: return "0000101";//000101                            case ‘7‘: return "0010001";                            case ‘8‘: return "0001001";                            case ‘9‘: return "0010111";                            default: return "Error!";                        }                    }                case ‘C‘:                    {                        switch (c)                        {                            case ‘0‘: return "1110010";                            case ‘1‘: return "1100110";                            case ‘2‘: return "1101100";                            case ‘3‘: return "1000010";                            case ‘4‘: return "1011100";                            case ‘5‘: return "1001110";                            case ‘6‘: return "1010000";                            case ‘7‘: return "1000100";                            case ‘8‘: return "1001000";                            case ‘9‘: return "1110100";                            default: return "Error!";                        }                    }                default: return "Error!";            }        }        private static string ean13type(char c)        {            switch (c)            {                case ‘0‘: return "AAAAAA";                case ‘1‘: return "AABABB";                case ‘2‘: return "AABBAB";                case ‘3‘: return "AABBBA";                case ‘4‘: return "ABAABB";                case ‘5‘: return "ABBAAB";                case ‘6‘: return "ABBBAA";//中国                case ‘7‘: return "ABABAB";                case ‘8‘: return "ABABBA";                case ‘9‘: return "ABBABA";                default: return "Error!";            }        }    }