关于条形码生成 及在打印页显示不出来的问题(BarCodeToHTML.cs)
如果只需要在电脑显示不打印 用BarCodeToHTML.cs包的方法getEAN13()即可;
如果需要在电脑显示并且打印 需要修改 BarCodeToHTML.cs包的方法getEAN13();
把所有background改成以背景图片显示即可;
以下代码是修改getEAN13()background后的代码:
public static string getEAN13(string s, int width, int height) { int checkcode_input = -1;//输入的校验码 if (!Regex.IsMatch(s, @"^\d{12}$")) { if (!Regex.IsMatch(s, @"^\d{13}$")) { 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>"; }
使用方法:
//调用时传入 12位 未校验的数字字符串("140504203323"),宽度(2),高度(50)
//BarCodeToHTML.getEAN13("140504203323", 2, 50);
//BarCodeToHTML.getEAN13("140504203323", 1, 30);
使用方法BarCodeToHTML.getEAN13(string s, int width, int height)
getEAN13()方法中会自动校验,返回13位条码