//
// ================================================= // 条码打印// // 设计: 陈炎和 2011.03//==================================================////BarCode128有三种不同的版本：A（数字、大写字母、控制字符）B（数字、大小字母、字符）C（双位数字）//本程序只处理B、C,BarCode128由码头、码身、码检、码尾组成,//using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Drawing; namespace cyh.General{ /// <summary> /// 生成条码打印类 /// </summary> public class BarCode128 { //ASCII从32到127对应的条码区,由3个条、3个空、共11个单元构成,符号内含校验码 private string[] Code128Encoding = new string[] { "11011001100", "11001101100", "11001100110", "10010011000", "10010001100", "10001001100", "10011001000", "10011000100", "10001100100", "11001001000", "11001000100", "11000100100", "10110011100", "10011011100", "10011001110", "10111001100", "10011101100", "10011100110", "11001110010", "11001011100", "11001001110", "11011100100", "11001110100", "11101101110", "11101001100", "11100101100", "11100100110", "11101100100", "11100110100", "11100110010", "11011011000", "11011000110", "11000110110", "10100011000", "10001011000", "10001000110", "10110001000", "10001101000", "10001100010", "11010001000", "11000101000", "11000100010", "10110111000", "10110001110", "10001101110", "10111011000", "10111000110", "10001110110", "11101110110", "11010001110", "11000101110", "11011101000", "11011100010", "11011101110", "11101011000", "11101000110", "11100010110", "11101101000", "11101100010", "11100011010", "11101111010", "11001000010", "11110001010", "10100110000", "10100001100", "10010110000", "10010000110", "10000101100", "10000100110", "10110010000", "10110000100", "10011010000", "10011000010", "10000110100", "10000110010", "11000010010", "11001010000", "11110111010", "11000010100", "10001111010", "10100111100", "10010111100", "10010011110", "10111100100", "10011110100", "10011110010", "11110100100", "11110010100", "11110010010", "11011011110", "11011110110", "11110110110", "10101111000", "10100011110", "10001011110", "10111101000", "10111100010", "11110101000", "11110100010", "10111011110", "10111101110", "11101011110", "11110101110", "11010000100", "11010010000", "11010011100" }; private const string Code128Stop = "11000111010", Code128End = "11"; //固定码尾 private enum Code128ChangeModes { CodeA = 101, CodeB = 100, CodeC = 99 }; //变更 private enum Code128StartModes { CodeUnset = 0, CodeA = 103, CodeB = 104, CodeC = 105 };//各类编码的码头/// <summary>
/// 绘制Code128码(以像素为单位) /// </summary> public int EncodeBarcode(string code, System.Drawing.Graphics g, int x, int y, int width, int height, bool showText) { if (string.IsNullOrEmpty(code)) new Exception("条码不能为空"); List<int> encoded = CodetoEncoded(code); //1.拆分转义 encoded.Add(CheckDigitCode128(encoded)); //2.加入校验码 string encodestring = EncodeString(encoded); //3.编码 if (showText) //计算文本的大小,字体占图像的1/4高 { Font font = new System.Drawing.Font("宋体", height/5F, System.Drawing.FontStyle.Regular, GraphicsUnit.Pixel, ((byte)(0))); SizeF size = g.MeasureString(code, font); height = height - (int)size.Height; g.DrawString(code, font, System.Drawing.Brushes.Black, x, y + height); int w = DrawBarCode(g, encodestring, x, y, width, height); //4.绘制 return ((int)size.Width > w ? (int)size.Width : w); } else return DrawBarCode(g, encodestring, x, y, width, height); //4.绘制 } //1.检测并将字符串拆分并加入码头 private List<int> CodetoEncoded(string code) { List<int> encoded = new List<int>(); int type = 0;//2:B类,3:C类 for (int i = 0; code.Length > 0; i++) { int k = isNumber(code); if (k >= 4) //连续偶个数字可优先使用C类(其实并不定要转C类，但能用C类时条码会更短) { if (type == 0) encoded.Add((int)Code128StartModes.CodeC); //加入码头 else if (type != 3) encoded.Add((int)(Code128ChangeModes.CodeC)); //转义 type = 3; for (int j = 0; j < k; j = j + 2) //两位数字合为一个码身 { encoded.Add(Int32.Parse(code.Substring(0, 2))); code = code.Substring(2); } } else { if ((int)code[0] < 32 || (int)code[0] > 126) throw new Exception("字符串必须是数字或字母"); if (type == 0) encoded.Add((int)Code128StartModes.CodeB); //加入码头 else if (type != 2) encoded.Add((int)(Code128ChangeModes.CodeB)); //转义 type = 2; encoded.Add((int)code[0] - 32);//字符串转为ASCII-32 code = code.Substring(1); } } return encoded; } //2.校验码 private int CheckDigitCode128(List<int> encoded) { int check = encoded[0]; for (int i = 1; i < encoded.Count; i++) check = check + (encoded[i] * i); return (check % 103); }//2.编码(对应Code128Encoding数组)
private string EncodeString(List<int> encoded) { string encodedString = ""; for (int i = 0; i < encoded.Count; i++) { encodedString += Code128Encoding[encoded[i]]; } encodedString += Code128Stop + Code128End; // 加入结束码 return encodedString; }//4.绘制条码(返回实际图像宽度)
private int DrawBarCode(System.Drawing.Graphics g, string encodeString, int x, int y, int width, int height) { int w = width / encodeString.Length; for (int i = 0; i < encodeString.Length; i++) { g.FillRectangle(encodeString[i] == '0' ? System.Drawing.Brushes.White : System.Drawing.Brushes.Black, x, y, w, height); x += w; } return w * (encodeString.Length+2); } //检测是否连续偶个数字,返回连续数字的长度 private int isNumber(string code) { int k = 0; for (int i = 0; i < code.Length; i++) { if (char.IsNumber(code[i])) k++; else break; } if (k % 2 != 0) k--; return k; }/// <summary>
/// 绘制Code128码到图片 /// </summary> public Image EncodeBarcode(string code, int width, int height, bool showText) { Bitmap image = new Bitmap(width, height); using (Graphics g = Graphics.FromImage(image)) { g.Clear(Color.White); int w = EncodeBarcode(code, g, 0, 0, width, height, showText);Bitmap image2 = new Bitmap(w, height); //剪切多余的空白;
using (Graphics g2 = Graphics.FromImage(image2)) { g2.DrawImage(image, 0, 0); return image2; }}
}
/// <summary> /// 绘制Code128码到流 /// </summary> public byte[] EncodeBarcodeByte(string code, int width, int height, bool showText) { Image image = EncodeBarcode(code, width, height, showText); System.IO.MemoryStream ms = new System.IO.MemoryStream(); image.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp); byte[] byteImage = ms.ToArray(); ms.Close(); image.Dispose(); return byteImage;}
}}